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Chauhan A, Pal A, Sachdeva M, Boora GS, Parsana M, Bakshi J, Verma RK, Srinivasan R, Chatterjee D, Maitra A, Ghoshal S. A FACS-based novel isolation technique identifies heterogeneous CTCs in oral squamous cell carcinoma. Front Oncol 2024; 14:1269211. [PMID: 38469233 PMCID: PMC10925612 DOI: 10.3389/fonc.2024.1269211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 02/02/2024] [Indexed: 03/13/2024] Open
Abstract
Purpose Isolating circulating tumour cells (CTCs) from the blood is challenging due to their low abundance and heterogeneity. Limitations of conventional CTC detection methods highlight the need for improved strategies to detect and isolate CTCs. Currently, the Food and Drug Administration (FDA)-approved CellSearch™ and other RUO techniques are not available in India. Therefore, we wanted to develop a flexible CTC detection/isolation technique that addresses the limitation(s) of currently available techniques and is suitable for various downstream applications. Methods We developed a novel, efficient, user-friendly CTC isolation strategy combining density gradient centrifugation and immuno-magnetic hematogenous cell depletion with fluorescence-activated cell sorting (FACS)-based positive selection using multiple CTC-specific cell-surface markers. For FACS, a stringent gating strategy was optimised to exclude debris and doublets by side scatter/forward scatter (SSC/FSC) discriminator, remove dead cells by 4',6-diamidino-2-phenylindole (DAPI) staining, and eliminate non-specific fluorescence using a "dump" channel. APC-labelled anti-CD45mAB was used to gate remaining hematogenous cells, while multiple epithelial markers (EpCAM, EGFR, and Pan-Cytokeratin) and an epithelial-mesenchymal transition (EMT) marker (Vimentin) labelled with fluorescein isothiocyanate (FITC) were used to sort cancer cells. The technique was initially developed by spiking Cal 27 cancer cells into the blood of healthy donors and then validated in 95 biopsy-proven oral squamous cell carcinoma (OSCC) patients. CTCs isolated from patients were reconfirmed by Giemsa staining, immuno-staining, and whole transcriptome amplification (WTA), followed by qRT-PCR. In vitro culture and RNA sequencing (RNA-Seq) were also performed to confirm their suitability for various downstream applications. Results The mean detection efficiency for the Cal 27 tongue cancer cells spiked in the whole blood of healthy donors was 32.82% ± 12.71%. While ~75% of our patients (71/95) had detectable CTCs, the CTC positivity was independent of the TNM staging. The isolated potential cancer cells from OSCC patients were heterogeneous in size. They expressed different CTC-specific markers in various combinations as identified by qRT-PCR after WTA in different patients. Isolated CTCs were also found to be suitable for downstream applications like short-term CTC culture and RNA-Seq. Conclusion We developed a sensitive, specific, flexible, and affordable CTC detection/isolation technique, which is scalable to larger patient cohorts, provides a snapshot of CTC heterogeneity, isolates live CTCs ready for downstream molecular analysis, and, most importantly, is suitable for developing countries.
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Affiliation(s)
- Anshika Chauhan
- Department of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Arnab Pal
- Department of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Meenakshi Sachdeva
- Department of Regenerative Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Geeta S. Boora
- Department of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Monil Parsana
- Department of Otolaryngology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Jaimanti Bakshi
- Department of Otolaryngology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Roshan Kumar Verma
- Department of Otolaryngology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Radhika Srinivasan
- Department of Cytology and Gynecological Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Debajyoti Chatterjee
- Department of Histopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Arindam Maitra
- National Institute of Biomedical Genomics, Kalyani, West Bengal, India
| | - Sushmita Ghoshal
- Department of Radiotherapy, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Gautamjit RK, Gupta R, Singh A, Panda NK, Ghoshal S, Bakshi JB, Verma RK. Feasibility of Establishing an Artificial Intelligence Based Head and Neck Cancer Registry: Experience from a Tertiary Care Hospital. Indian J Otolaryngol Head Neck Surg 2022; 74:588-593. [PMID: 36373123 PMCID: PMC9638407 DOI: 10.1007/s12070-022-03173-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/19/2022] [Indexed: 11/08/2022] Open
Abstract
Introduction Establishing and maintaining a cancer registry in a tertiary high volume centre is fraught with difficulty, inaccuracy and missed data entry. Further, the raw unstructured data must be converted into a structured digital data, so that scientists can identify trends in cancer diagnoses and treatment responses. Objective We test the feasibility of establishing a cancer registry of Head and Neck malignancy patients through a research oriented artificial intelligence (AI) enabled data collection platform, using its smartphone application version. Materials and Methods This prospective observational study was conducted in the Department of Otolaryngology & Head and Neck Surgery, Post Graduate Institute of Medical Education And Research, Chandigarh in collaboration with Departments of Radiotherapy and Community Medicine. After taking due clearance from the Institute ethical committee, HNC patients, who were biopsy proven, were enrolled from October 2019 up to March 2021. The obtained data was entered, followed up and analysed through Jiyyo Research application which is a commercially available dedicated research oriented AI enabled data collection platform. Results The Jiyyo Research site was browsed and after proper registration, the patient data was entered into a proforma/questionnaire. The entered patient details were browsed for review, follow up and addition of new information. The whole process of data capture for each patient, took approximately 5-8 min, while any updates or review for the same patient required less than a minute. Search and data retrieval was very quick, and can be done in 1-2 min. Through this platform, a total of 1214 HNC patients were collected, followed and analysed during the study period. Conclusion It was feasible to establish a Head and Neck Cancer Registry using an AI based smartphone app. This AI based tumor registry could benefit in further studies with longer follow up of 5 and 10 years and in future AI studies. Supplementary Information The online version contains supplementary material available at 10.1007/s12070-022-03173-3.
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Affiliation(s)
- R K Gautamjit
- grid.415131.30000 0004 1767 2903*Department of Otolaryngology and Head and Neck surgery, PGIMER, 160012 Chandigarh, India
| | - Rijuneeta Gupta
- grid.415131.30000 0004 1767 2903*Department of Otolaryngology and Head and Neck surgery, PGIMER, 160012 Chandigarh, India
| | - Amarjeet Singh
- grid.415131.30000 0004 1767 2903**Department of Community Medicine, School of Public Health, PGIMER, Chandigarh, India
| | - Naresh Kumar Panda
- grid.415131.30000 0004 1767 2903*Department of Otolaryngology and Head and Neck surgery, PGIMER, 160012 Chandigarh, India
| | - Sushmita Ghoshal
- grid.415131.30000 0004 1767 2903***Department of Radiotherapy and oncology, PGIMER, Chandigarh, India
| | - Jaimanti B. Bakshi
- grid.415131.30000 0004 1767 2903*Department of Otolaryngology and Head and Neck surgery, PGIMER, 160012 Chandigarh, India
| | - Roshan Kumar Verma
- grid.415131.30000 0004 1767 2903*Department of Otolaryngology and Head and Neck surgery, PGIMER, 160012 Chandigarh, India
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Ghoshal S, Dracham CB, Sundaram A, Kumar R, Bal A, Das A, Bahl A, Verma RK, Elangovan A. Prognostic Value of HPV Infection Assessed by p16 Immunohistochemistry and the Influence of Tobacco Usage in Oropharyngeal Cancers: Real World Scenario. Indian J Otolaryngol Head Neck Surg 2022; 74:5823-5831. [PMID: 36742604 PMCID: PMC9895501 DOI: 10.1007/s12070-021-02427-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/25/2021] [Indexed: 02/07/2023] Open
Abstract
To find if an association could be established between Human Papilloma Virus (HPV) infection and oropharyngeal cancers (OPCs) in a group of patients known to be regular users of tobacco, and to determine the impact of HPV status on clinical outcomes.Case records of 212 patients with AJCC-7 (The American Joint Committee on Cancer 7th edition) stages II-IVB non metastatic squamous cell carcinoma of the oropharynx treated using radical radiotherapy with or without chemotherapy during the years 2015-2018 were retrieved. Formalin-fixed, paraffin-embedded blocks from oropharyngeal biopsies were available for 177 patients and were evaluated for p16 expression by immunohistochemical (IHC) staining. More than 50% nuclear staining with or without cytoplasmic staining was considered HPV+ . The association between tobacco use and HPV, as well as the influence of HPV status on survival outcomes were assessed. p16 expression was found to be positive in 23(13%) patients. Significant association was found between chewable tobacco usage and HPV positivity (p = 0.051). The median follow up was 20.5 months (range: 3-80). 5-year Overall Survival was 43.4% and 29.8% (p = 0.044) in HPV+ and HPV- patients, respectively. Local control was significantly better in HPV+ patients (38.6% vs. 25.3%, p = 0.049). There was also a trend towards improved Disease-free Survival in HPV+ patients (31 months vs. 15 months, p = 0.078). Though less in prevalence among the Indian population, improved outcomes in HPV+ OPC patients and widely available IHC HPV assays signifies the routine implementation of p16 testing in day-to-day clinical practice.
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Affiliation(s)
- Sushmita Ghoshal
- Department of Radiotherapy and Oncology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Chinna Babu Dracham
- Department of Radiotherapy and Oncology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Archana Sundaram
- Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Rajesh Kumar
- Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Amanjit Bal
- Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Ashim Das
- Department of Pathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Amit Bahl
- Department of Radiotherapy and Oncology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Roshan Kumar Verma
- Department of Otorhinolaryngology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Arun Elangovan
- Department of Radiotherapy and Oncology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Muraleedharan M, Panda NK, Angrish P, Arora K, Patro SK, Bansal S, Chakrabarti A, Rudramurthy SM, Bakshi J, Mohindra S, Gupta R, Virk RS, Verma RK, Ramavat AS, Nayak G. As the virus sowed, the fungus reaped! A Comparative Analysis of the Clinico-epidemiological Characteristics of Rhino-orbital Mucormycosis before and during Covid -19 Pandemic. Mycoses 2022; 65:567-576. [PMID: 35289000 PMCID: PMC9115264 DOI: 10.1111/myc.13437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 11/27/2022]
Abstract
Background The sudden surge of mucormycosis cases which happened during the second wave of COVID‐19 pandemic was a significant public health problem in India. Objectives The aim of this study was to analyse the clinico‐epidemicological characteristics of the mucormycosis cases to determine the changes that had occurred due to COVID‐19 pandemic. Methodology A retrospective cross‐sectional study was conducted at the Department of Otolaryngology Head and Neck Surgery, PGIMER, Chandigarh, India. Patients diagnosed with rhino‐orbital mucormycosis were categorised into the following groups: Pre‐pandemic(May 2019 to April 2020), Pandemic Pre‐epidemic (May 2020 to April 2021) and Epidemic (1 May 2021 to 12 July 2021). The epidemiological, clinical and surgical data of all the patients were retrieved from the hospital records and analysed. Results The epidemic period had 370 cases, compared with 65 during pandemic period and 42 in the pre‐pandemic period. Diabetes mellitus was seen in 87% of cases during epidemic period, 92.9% in the pre‐pandemic period and 90.8% in the pre‐pandemic pre‐epidemic period. The proportion of patients suffering from vision loss, restricted extra‐ocular movements, palatal ulcer and nasal obstruction was higher in the pre‐epidemic groups, and the difference was significant (p, <.01). There was no history of oxygen use in 85.9% of patients and no steroid use in 76.5%. The death rates were the lowest during epidemic (10%). Conclusion COVID‐19 has caused a statistically significant increase in the number of mucormycosis infections. The mortality and morbidity which showed an increase during the first wave of COVID‐19 decreased significantly during the epidemic period.
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Affiliation(s)
- Manjul Muraleedharan
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Naresh Kumar Panda
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Prerna Angrish
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Kanika Arora
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Sourabha Kumar Patro
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Sandeep Bansal
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Arunaloke Chakrabarti
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | | | - Jaimanti Bakshi
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Satyawati Mohindra
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Rijuneeta Gupta
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Ramandeep Singh Virk
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Roshan Kumar Verma
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Anurag Snehi Ramavat
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Gyanaranjan Nayak
- Department of Otolaryngology Head and Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
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Goel M, Kumar A, Maitra G, Verma RK. First report of trans-mediastinal perforation of bilateral main bronchi by a self-expandable metallic stent. Lung India 2022; 39:201-202. [PMID: 35259807 PMCID: PMC9053922 DOI: 10.4103/lungindia.lungindia_720_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Goel MK, Kumar A, Maitra G, Singh B, Ahlawat S, Jain P, Garg N, Verma RK. Safety and diagnostic yield of transbronchial lung cryobiopsy by flexible bronchoscopy using laryngeal mask airway in diffuse and localized peripheral lung diseases: A single-center retrospective analysis of 326 cases. Lung India 2021; 38:109-116. [PMID: 33687002 PMCID: PMC8098897 DOI: 10.4103/lungindia.lungindia_220_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background Intubation with either an endotracheal tube or a rigid bronchoscope is generally preferred to provide airway protection as well as to manage unpredictable complications during transbronchial lung cryobiopsy (TBLC). The laryngeal mask airway has been described as a safe and convenient tool for airway control during bronchoscopy. Aims and Objectives In this study, we evaluated the safety and outcome of using a laryngeal mask airway (LMA) as a conduit for performing TBLC by flexible video bronchoscopy (FB). Methods We retrospectively analyzed the database of the patients who underwent TBLC between November 2015 and September 2019. The procedure was performed using FB through LMA under general anesthesia. Prophylactic occlusion balloon was routinely used starting January 2017 onwards. Radial endobronchial ultrasound (R-EBUS) guidance was used for TBLC in the localized lung lesions when deemed necessary. Multidisciplinary consensus diagnostic yield was determined and periprocedural complications were recorded. Results A total of 326 patients were analysed. The overall diagnostic yield was 81.60% (266/326) which included a positive yield of 82.98% (161/194) in patients with diffuse lung disease and 79.54% (105/132) in patients with localized disease. Serious bleeding complication occurred in 3 (0.92%) cases. Pneumothorax was encountered in 8 (2.45%) cases. A total of 9 (2.76%) cases had at least 1 major complication. Conclusion This study demonstrates that the use of LMA during TBLC by flexible bronchoscopy allows for a convenient port of entry, adequate airway support and effective endoscopic management of intrabronchial haemorrhage especially with the use of occlusion balloon.
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Affiliation(s)
- Manoj Kumar Goel
- Department of Pulmonology, Critical Care and Sleep Medicine, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Ajay Kumar
- Department of Pulmonology, Critical Care and Sleep Medicine, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Gargi Maitra
- Department of Pulmonology, Critical Care and Sleep Medicine, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Balkar Singh
- Department of Anesthesiology, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Sunita Ahlawat
- Department of Pathology, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Priti Jain
- Department of Pathology, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - Neeraj Garg
- Department of Pathology, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - R K Verma
- Department of Radiology, Fortis Memorial Research Institute, Gurugram, Haryana, India
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Madakshira MG, Bal A, Verma RK. Desmoplastic fibroma of the mandible: a rare gnathic bone tumor with a review of the literature. Autops Case Rep 2019; 9:e2019091. [PMID: 31641651 PMCID: PMC6771450 DOI: 10.4322/acr.2019.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/07/2019] [Indexed: 11/23/2022] Open
Abstract
Desmoplastic fibroma (DF) is a rare bone tumor, which is known to involve mostly the gnathic bones. In this setting, the clinical presentation is usually represented by a bulging tumor of the face. Radiologically, the tumor is usually characterized by an expansile lytic bone lesion. The histopathology of the tumor shows a poorly circumscribed hypocellular lesion rich in collagen fibers with interspersed spindle cells having bland nuclear chromatin. Despite the lack of mitoses and nuclear pleomorphism, DF has an aggressive nature, presenting as a destructive growth causing entrapment of neuro-vascular bundles, sinusitis, or trismus. Some cases of DF show mutations in the adenomatous polyposis coli pathway shown by nuclear localization of the β-catenin protein. Few reports showed an association with tuberous sclerosis, though most of these cases were sporadic. We discuss a rare case of desmoplastic fibroma involving the mandible, and a review of the literature of the DF cases involving the gnathic bones.
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Affiliation(s)
- Manoj Gopal Madakshira
- Post Graduate Institute and Medical Education and Research (PGIMER), Department of Histopathology. Chandigarh, India
| | - Amanjit Bal
- Post Graduate Institute and Medical Education and Research (PGIMER), Department of Histopathology. Chandigarh, India
| | - Roshan Kumar Verma
- Post Graduate Institute and Medical Education and Research (PGIMER), Department of Otolaryngology and Head & Neck Surgery. Chandigarh, India
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Chayanika K, Krishna V, Sanjay K, Verma RK, Verma CM, Pandey U. Transient Stress Lymphocytosis in Cardiac Emergencies: A Clinicopathological Study of Under-recognized Entity at a Tertiary Care Cardiology Institute in North India. J Cardiovasc Dis Res 2018. [DOI: 10.5530/jcdr.2018.1.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Singha D, Rana S, Kumar S, Singh Y, Singh J, Verma RK. Efficacy of magnesium sulphate and/or fentanyl as adjuvants to intrathecal low-dose bupivacaine in parturients undergoing elective caesarean section. J Obstet Anaesth Crit Care 2017. [DOI: 10.4103/joacc.joacc_24_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Mann VS, Subramanyam M, Verma RK, Jha AA, John JR. Estimation and Comparison of Erythrocyte and Hemoglobin Levels in Subjects with Healthy Periodontium and Chronic Periodontitis. Pesqui bras odontopediatria clín integr 2017. [DOI: 10.4034/pboci.2017.171.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lee YL, Verma RK, Yadav H, Barua A. Health impacts of Facebook usage and mobile texting among undergraduate dental students: it's time to understand the difference between usage and an excessive use. Eur J Dent Educ 2016; 20:218-228. [PMID: 26277860 DOI: 10.1111/eje.12164] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/13/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Facebook and mobile texting are prevalent in the lives of almost every student. However, little is known about the relationship between Facebook usage or mobile texting and their impacts on health amongst undergraduate dental students. In this study, excessive Facebook use and excessive mobile texting were studied as they relate to impacts on health. MATERIALS AND METHODS A cross-sectional study was conducted at a private university in Malaysia. A total of 188 undergraduate dental students were interviewed using a pre-tested and self-rated questionnaire. Data collected from participants were analysed using SPSS version 18.0. Chi-square test, Fisher's exact test and multiple logistic regression analyses were applied to study the relationship between explanatory variables and excessive Facebook use and excessive mobile texting. RESULTS The prevalence of excessive Facebook use and excessive mobile texting amongst undergraduate dental students was found to be 33.2% and 33.0%, respectively. According to a multivariate analysis, texting habits, such as the presence of daytime sleepiness after texting late at night (aOR = 2.682, 95% CI = 1.142-6.301) and the presence of anxious feelings if students failed to receive a timely response (aOR = 3.819, 95% CI = 1.580-9.230), were determined to be significant predictors of excessive mobile texting. Excessive Facebook use was found to be significantly related to three variables as follows: fewer numbers of close friends (aOR = 2.275, 95% CI = 1.057-4.898), the checking of updates on the Facebook walls of their friends (aOR = 2.582, 95% CI = 1.189-5.605) and the absence of active and vigorous feelings during Facebook use (aOR = 3.401, 95% CI = 1.233-9.434). CONCLUSIONS Approximately one-third of undergraduate dental students in this study experienced excessive Facebook use and/or excessive mobile texting. Health education and promotion should be instituted to create awareness, whilst students should be advised to practise self-control with respect to both mobile texting and Facebook usage.
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Affiliation(s)
- Y L Lee
- Department of Pharmacy Practice, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - R K Verma
- Department of Pharmacy Practice, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia.
| | - H Yadav
- Department of Community Medicine, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
| | - A Barua
- Department of Community Medicine, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
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Santhosh S, Bhattacharya A, Verma RK, Lal A, Mittal BR. A rare case of asymptomatic radioiodine-avid renal and brain metastases 20 years after hemi-thyroidectomy for adenomatous goiter. Indian J Nucl Med 2016; 31:42-4. [PMID: 26917894 PMCID: PMC4746841 DOI: 10.4103/0972-3919.172358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A 65-year-old patient, with a history of left hemi-thyroidectomy for adenomatous goiter 20 years previously, was found to have pulmonary lesions on chest X-ray, a brain lesion on computerized tomography (CT), and elevated serum thyroglobulin (Tg). While completion thyroidectomy revealed that no pathological evidence of thyroid malignancy, radioiodine-avid pulmonary, brain, and renal and bone lesions were identified on diagnostic as well as posttherapy whole body planar scintigraphy and single photon emission computed tomography-CT. Subsequent ultrasonography-guided biopsy of a renal nodule showed thyroid follicular cells. This case suggests that metastatic differentiated thyroid carcinoma should be suspected in asymptomatic patients with incidentally detected lesions, raised serum Tg, and history of thyroid lesions.
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Affiliation(s)
- Sampath Santhosh
- Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Anish Bhattacharya
- Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Roshan Kumar Verma
- Department of Otolaryngology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Anupam Lal
- Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Bhagwant Rai Mittal
- Department of Nuclear Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Weisstanner C, Mantokoudis G, Huth M, Verma RK, Nauer C, Senn P, Caversaccio MD, Wagner F. Radiation dose reduction in postoperative computed position control of cochlear implant electrodes in lambs - An experimental study. Int J Pediatr Otorhinolaryngol 2015; 79:2348-54. [PMID: 26596357 DOI: 10.1016/j.ijporl.2015.10.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/27/2015] [Accepted: 10/29/2015] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Cochlear implants (CI) are standard treatment for prelingually deafened children and postlingually deafened adults. Computed tomography (CT) is the standard method for postoperative imaging of the electrode position. CT scans accurately reflect electrode depth and position, which is essential prior to use. However, routine CT examinations expose patients to radiation, which is especially problematic in children. We examined whether new CT protocols could reduce radiation doses while preserving diagnostic accuracy. METHODS To investigate whether electrode position can be assessed by low-dose CT protocols, a cadaveric lamb model was used because the inner ear morphology is similar to humans. The scans were performed at various volumetric CT dose-indexes CTDIvol)/kV combinations. For each constant CTDIvol the tube voltage was varied (i.e., 80, 100, 120 and 140kV). This procedure was repeated at different CTDIvol values (21mGy, 11mGy, 5.5mGy, 2.8mGy and 1.8mGy). To keep the CTDIvol constant at different tube voltages, the tube current values were adjusted. Independent evaluations of the images were performed by two experienced and blinded neuroradiologists. The criteria diagnostic usefulness, image quality and artifacts (scaled 1-4) were assessed in 14 cochlear-implanted cadaveric lamb heads with variable tube voltages. RESULTS Results showed that the standard CT dose could be substantially reduced without sacrificing diagnostic accuracy of electrode position. The assessment of the CI electrode position was feasible in almost all cases up to a CTDIvol of 2-3mGy. The number of artifacts did not increase for images within this dose range as compared to higher dosages. The extent of the artifacts caused by the implanted metal-containing CI electrode does not depend on the radiation dose and is not perceptibly influenced by changes in the tube voltage. Summarizing the evaluation of the CI electrode position is possible even at a very low radiation dose. CONCLUSIONS CT imaging of the temporal bone for postoperative electrode position control of the CI is possible with a very low and significantly radiation dose. The tube current-time product and voltage can be reduced by 50% without increasing artifacts. Low-dose postoperative CT scans are sufficient for localizing the CI electrode.
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Affiliation(s)
- C Weisstanner
- University Institute for Diagnostic and Interventional Neuroradiology, Inselspital, Bern, Switzerland
| | - G Mantokoudis
- University Department of Otorhinolaryngology, Head & Neck Surgery, Inselspital, Bern, Switzerland
| | - M Huth
- University Department of Otorhinolaryngology, Head & Neck Surgery, Inselspital, Bern, Switzerland
| | - R K Verma
- University Institute for Diagnostic and Interventional Neuroradiology, Inselspital, Bern, Switzerland
| | - C Nauer
- Department of Radiologie, Kantonsspital, Chur, Switzerland
| | - P Senn
- University Department of Otorhinolaryngology, Head & Neck Surgery, Inselspital, Bern, Switzerland
| | - M D Caversaccio
- University Department of Otorhinolaryngology, Head & Neck Surgery, Inselspital, Bern, Switzerland
| | - F Wagner
- University Institute for Diagnostic and Interventional Neuroradiology, Inselspital, Bern, Switzerland.
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Yadav RS, Verma RK, Bahadur A, Rai SB. Infrared to infrared upconversion emission in Pr(3+)/Yb(3+) co-doped La2O3 and La(OH)3 nano-phosphors: a comparative study. Spectrochim Acta A Mol Biomol Spectrosc 2015; 142:324-330. [PMID: 25706603 DOI: 10.1016/j.saa.2015.01.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 01/17/2015] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
The Pr(3+)/Yb(3+) co-doped La2O3 and La(OH)3 nano-phosphors have been synthesized through solution combustion method. The structure and morphology of the samples have been studied using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The physical and optical properties of the samples have been measured and compared. A broad intense infrared emission centered at 850nm due to (1)I6→(1)G4 transition along with sharp green emission centerd at 513nm due to (3)P0→(3)H4 transition are observed on excitation with 976nm laser. The emission intensity of Pr(3+) is optimized with concentration and it is maximum at 0.08mol%. The annealed samples are found to be more crystalline and emit larger photoluminescence due to removal of quenching centers. The power dependent study of green upconversion emission indicates the involvement of two photons. The phosphor in La(OH)3 phase is more stable though the photoluminescence emission is slightly weak. La(OH)3 is less toxic compared to La2O3 and is biocompatible. It generates more heat and can be used in biothermal treatment.
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Affiliation(s)
- R S Yadav
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - R K Verma
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - A Bahadur
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - S B Rai
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India.
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16
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Gratz PP, Schroth G, Gralla J, Mattle HP, Fischer U, Jung S, Mordasini P, Hsieh K, Verma RK, Weisstanner C, El-Koussy M. Whole-Brain Susceptibility-Weighted Thrombus Imaging in Stroke: Fragmented Thrombi Predict Worse Outcome. AJNR Am J Neuroradiol 2015; 36:1277-82. [PMID: 25792535 DOI: 10.3174/ajnr.a4275] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 12/11/2014] [Indexed: 01/14/2023]
Abstract
BACKGROUND AND PURPOSE The prevalence and clinical importance of primarily fragmented thrombi in patients with acute ischemic stroke remains elusive. Whole-brain SWI was used to detect multiple thrombus fragments, and their clinical significance was analyzed. MATERIALS AND METHODS Pretreatment SWI was analyzed for the presence of a single intracranial thrombus or multiple intracranial thrombi. Associations with baseline clinical characteristics, complications, and clinical outcome were studied. RESULTS Single intracranial thrombi were detected in 300 (92.6%), and multiple thrombi, in 24 of 324 patients (7.4%). In 23 patients with multiple thrombi, all thrombus fragments were located in the vascular territory distal to the primary occluding thrombus; in 1 patient, thrombi were found both in the anterior and posterior circulation. Only a minority of thrombus fragments were detected on TOF-MRA, first-pass gadolinium-enhanced MRA, or DSA. Patients with multiple intracranial thrombi presented with more severe symptoms (median NIHSS scores, 15 versus 11; P = .014) and larger ischemic areas (median DWI ASPECTS, 5 versus 7; P = .006); good collaterals, rated on DSA, were fewer than those in patients with a single thrombus (21.1% versus 44.2%, P = .051). The presence of multiple thrombi was a predictor of unfavorable outcome at 3 months (P = .040; OR, 0.251; 95% CI, 0.067-0.939). CONCLUSIONS Patients with multiple intracranial thrombus fragments constitute a small subgroup of patients with stroke with a worse outcome than patients with single thrombi.
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Affiliation(s)
- P P Gratz
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - G Schroth
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - J Gralla
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - H P Mattle
- Neurology (H.P.M., U.F., S.J.), Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - U Fischer
- Neurology (H.P.M., U.F., S.J.), Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - S Jung
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.) Neurology (H.P.M., U.F., S.J.), Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - P Mordasini
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - K Hsieh
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - R K Verma
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - C Weisstanner
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
| | - M El-Koussy
- From the Departments of Diagnostic and Interventional Neuroradiology (P.P.G., G.S., J.G., S.J., P.M., K.H., R.K.V., C.W., M.E.-K.)
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Yadav RS, Verma RK, Bahadur A, Rai SB. Structural characterizations and intense green upconversion emission in Yb3+, Pr3+ co-doped Y2O3 nano-phosphor. Spectrochim Acta A Mol Biomol Spectrosc 2015; 137:357-362. [PMID: 25233026 DOI: 10.1016/j.saa.2014.08.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/20/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
We report the structural and optical properties of Yb(3+), Pr(3+) co-doped Y2O3 nano-phosphor synthesized through solution combustion method. The structural studies reveal the nano-crystalline structure of the sample. The energy dispersive spectroscopy (EDS) measurements confirm the presence of Y, O, Pr and Yb elements in the sample. Fourier transform infrared studies show the vibrational features of the samples. The fluorescence spectra of the samples have been monitored on excitation with 976 nm and the intense green upconversion emission observed at 552 nm is due to (3)P0→(3)H5 electronic transition. The concentration of Pr(3+) ion in the sample is optimized and the fluorescence intensity is maximum at 0.08 mol% of Pr(3+). The power dependence studies reveal the involvement of two photons in the emission process. The possible mechanism of upconversion has been discussed on the basis of schematic energy level diagram. The sample annealed at higher temperature enhances the fluorescence intensity up to 8 times and this enhancement is discussed in terms of the removal of optical quenching centers. The nano-phosphor can be applicable in the field of display devices and green laser.
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Affiliation(s)
- R S Yadav
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - R K Verma
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - A Bahadur
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - S B Rai
- Laser & Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India.
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18
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Verma RK, Gupta B, Panda NK. Foreign body resulting in chronic otomastoiditis and facial palsy. Int J Pediatr Otorhinolaryngol 2015; 79:259-61. [PMID: 25500549 DOI: 10.1016/j.ijporl.2014.11.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 11/12/2014] [Accepted: 11/16/2014] [Indexed: 11/27/2022]
Abstract
We present a case of a foreign body in the ear of 5-year-old girl child. She presented with features of chronic suppurative otitis media with facial nerve palsy. On exploration exuberant granulation was found in attic and middle ear. A foreign body (seed) was found buried within the granulation tissue which was removed. Bony facial canal was dehiscent in the tympanic segment. She had recovery of facial nerve function. The case is being reported to increase awareness among otolaryngologist and to consider foreign body as a differential diagnosis in cases of complicated CSOM; especially in children.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolarngology and Head & Neck surgery, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India.
| | - Bhumika Gupta
- Department of Otolarngology and Head & Neck surgery, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Naresh K Panda
- Department of Otolarngology and Head & Neck surgery, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
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Sharma P, Verma RK, Mishra R, Sahu AK, Choudhary DK, Gaur RK. First report of cucumber green mottle mosaic virus association with the leaf green mosaic disease of a vegetable crop, Luffa acutangula L. Acta Virol 2014; 58:299-300. [PMID: 25283869 DOI: 10.4149/av_2014_03_299] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Verma RK, Sunku SK, Panda NK. Contrasting radiological presentation of cervical sympathetic chain schwannoma: case series of two cases. Otolaryngol Pol 2014; 68:271-5. [PMID: 25283326 DOI: 10.1016/j.otpol.2013.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 12/05/2013] [Indexed: 11/17/2022]
Abstract
Splaying of carotid bifurcation on imaging, known as Lyre sign, is seen characteristically in carotid body tumors. Is positive Lyre sign always confirmatory of carotid body tumor? Here we discuss two cases of cervical sympathetic chain schwannoma. The first case presented radiologically as an enhancing lesion with splaying of external carotid artery and internal carotid artery (positive Lyre sign) and misled us to the diagnosis of carotid body tumor. The second case presented as an enhancing lesion causing anterior displacement of external carotid artery and internal carotid artery (negative Lyre sign). Both lesions were confirmed as cervical sympathetic schwannoma. Post-operatively both patients developed Horner's syndrome. Lyre sign is not always confirmatory of carotid body tumor.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolarngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India; Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
| | - Satheesh Kumar Sunku
- Department of Otolarngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India; Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Naresh K Panda
- Department of Otolarngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India; Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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21
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Verma RK, Panda NK. Metallic foreign body migrating into prevertebral muscles: how we did it? Oman Med J 2014; 29:64-6. [PMID: 24501661 DOI: 10.5001/omj.2014.14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 12/09/2013] [Indexed: 11/03/2022] Open
Abstract
Accidental ingestion of foreign bodies is common in ENT practice. A very small number of ingested foreign bodies perforate the esophagus and even a smaller fraction of extra mucosal migration penetrates into the soft tissues of the neck. Most cases reported in the literature involve fish bones. If left untreated, they may result in life threatening complications. This case presents a patient with a metallic foreign body (metal wire) in the esophagus which migrated extraluminally into the prevertebral muscle of the neck and describes the difficulties encountered in removing the migrated foreign body. Intra-operative radiography using two metallic pointers was used to locate the exact position of the foreign body during exploration of the neck.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolaryngology and Head & Neck Surgery, PGIMER, sec 12 Chandigarh-160012, India
| | - Naresh K Panda
- Department of Otolaryngology and Head & Neck Surgery, PGIMER, sec 12 Chandigarh-160012, India
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22
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Tripathi N, Verma RK, Panda NK, Ghosal S, Sharma A. Early evaluation of voice quality in glottic cancer (T1, T2) following curative radiotherapy. Rev Laryngol Otol Rhinol (Bord) 2014; 135:91-96. [PMID: 26521348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND This is prospective study analyzing the subjective and objective quality of voice and voice related quality of life in patients of early glottic cancer (T1, T2 disease) before and after receiving curative radiotherapy. METHODS Fifteen patients of early glottic carcinoma (T1, T2) underwent voice assessment using multidimensional voice protocol based on recommendation by European Laryngological Society which included Perceptual analysis of voice by speech therapist and otolaryngologist, acoustic analysis; aerodynamic efficiency analysis-Maximum phonation time; patient's self perception of voice analysis--Voice handicap index; and videolaryngostroboscopy. Assessment was done prior to commencement of radiation therapy and at 1 month and 3 months following radio- therapy. RESULTS There was significant improvement in majority of the voice parameters post radiotherapy. Perceptual analysis showed significant improvement in GRBAS score following radiotherapy. Perturbation measures (jitter, shimmer, SNR, HNR) showed improvement post radiotherapy though remained inferior compared to controls. Mean fundamental frequency (Mean F0) and habitual frequency (habitual F0) decreased post radiotherapy. Intensity of voice increased following radiotherapy which was statistically significant (p < 0.05). There was significant improvement in the patient's perception of their quality of voice and voice related quality of life post radiotherapy. Maximum phonation time showed statistically significant improvement post-radiotherapy. Perceptual analysis of voice by professional observer correlated well with patients self perception of his own voice. CONCLUSION Voice quality improves following radiotherapy but not all the patients regain normal voice. Improvement in voice quality improves quality of life of patients shown by improved voice handicap index.
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Verma RK, Sunku SK, Bal A, Panda NK. Giant cystic primary mucoepidermoid carcinoma of mandible: a rare case and literature review. Otolaryngol Pol 2013; 68:328-32. [PMID: 25441939 DOI: 10.1016/j.otpol.2013.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 11/28/2013] [Indexed: 11/16/2022]
Abstract
Primary intra-osseous mucoepidermoid carcinoma arising from jaw is an extremely rare condition accounting to less than 2% of all mucoepidermoid carcinomas. In the jaw, it occurs more commonly in mandible than maxilla. They are low-grade cancers and affect jaw as uni- or multi-locular radiographic lesions. Here we discuss a rare case of giant cystic primary intra-cystic mucoepidermoid carcinoma of the mandible which was excised in toto. Here we discuss the clinical features, radiological and histological characteristics of this rare lesion, and review the literature.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
| | - Satheesh Kumar Sunku
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Amanjeet Bal
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Naresh K Panda
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Verma RK, Kaushal D, Panda NK. External jugular vein aneurysm with thrombus presenting as painful neck mass: a case report. Oman Med J 2013; 28:278-80. [PMID: 23904923 PMCID: PMC3725242 DOI: 10.5001/omj.2013.77] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 05/29/2013] [Indexed: 11/03/2022] Open
Abstract
External jugular vein aneurysm with thrombosis presenting as neck swelling is a rare clinical entity and rarely encountered in routine clinical practice. We present a case of a 45-year-old female with external jugular vein aneurysm presenting as a painful lump in the neck. Ultrasound of the neck and CT angiography showed saccular dilation of the lower end of the external jugular vein with thrombosis within the aneurysm. Saccular aneurysm of the external jugular vein is very uncommon and can lead to thrombotic complications with serious consequence.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh-160012, India
| | - Darwin Kaushal
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh-160012, India
| | - Naresh K. Panda
- Department of Otolaryngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh-160012, India
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Verma RK, Kumar R, Bal A, Panda NK. Aneurysmal bone cyst of maxilla with ectopic molar tooth - a case report. Otolaryngol Pol 2013; 67:302-7. [PMID: 24238115 DOI: 10.1016/j.otpol.2013.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
Abstract
Aneurysmal cysts of bone are rare non-neoplastic, locally aggressive lesion of bone with propensity for rapid growth, affecting mainly the long bones and spine. It rarely occurs in the head and neck region and within the head and neck mandible (especially the molar areas) is common. Aneurysmal cyst of bone involving the maxilla in the first decade of life is even rarer. We report a case of giant aneurysmal bone cyst of maxilla in eight-year-old male with ectopic molar tooth within the cyst. Is endoscopic excision possible? Endoscopic excision of the cyst was done successfully and no recurrence was noted even after 1 year of follow up.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolarngology and Head & Neck Surgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
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Abstract
During routine dissection of the submental region of a 65-year-old female cadaver, a bilateral supernumerary muscle, medial to the anterior bellies of the digastric muscle, was observed. The accessory muscle bundle was attached proximally to the digastric fossa of the mandible, with an intermediate attachment to the body of hyoid bone and a distal attachment to the medial margin of the lower end of the anterior belly of the digastric muscle and its intermediate tendon on the respective side. These types of bilaterally symmetrical accessory muscles of the submental region may be erroneously identified as an infarcted submental lymph node or a pseudomass on radiological examinations.
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Affiliation(s)
- A Rani
- Department of Anatomy, King George’s Medical University, Lucknow, India.
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Verma RK, Modi R, Panda NK. Anterior jugular phlebectasia and tinnitus: A case report. Ear Nose Throat J 2013; 92:E24-E25. [PMID: 23532658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
Abnormal dilation of a normal anterior jugular vein is a rare anomaly and usually presents as a neck lump. To the best of our knowledge, this is the first report in the literature of such a case in which the patient presented with severe tinnitus. Excision of the dilated portion of the anterior jugular vein in our patient alleviated the severe tinnitus.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolaryngology and Head and Neck Surgery, PGIMER, Chandigarh 160012, India.
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Yadav RV, Verma RK, Kaur G, Rai SB. Change in structural morphology on addition of ZnO and its effect on fluorescence of Yb³⁺/Er³⁺ doped Y₂O₃. Spectrochim Acta A Mol Biomol Spectrosc 2013; 103:216-221. [PMID: 23261616 DOI: 10.1016/j.saa.2012.10.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 10/08/2012] [Accepted: 10/10/2012] [Indexed: 06/01/2023]
Abstract
Yb(3+)/Er(3+) codoped Y(2)O(3) phosphor and its composite with ZnO have been synthesized by combustion method. Morphology of the materials has been investigated using X-ray diffraction pattern (XRD) and scanning electron microscopy (SEM) techniques. XRD confirms the constituents as Y(2)O(3) and ZnO, with average crystallite size of 112 nm. On addition of ZnO, a small shifting in XRD pattern of Y(2)O(3) is observed. SEM pattern suggests that the average particle size lies in micro-range (0.5 μm). A dumble like structure is observed for hybrid material on annealing at 1473 K. A strong green (525, 546 nm) with weak blue (411 nm) and red (657 nm) emissions through upconversion has been observed from the phosphor on excitation with 976 nm diode laser. The observed emissions involve (2)H(9/2)→(4)I(15/2), (2)H(11/2)→(4)I(15/2), (4)S(3/2)→(4)I(15/2) and (4)F(9/2)→(4)I(15/2) electronic transitions, respectively. The upconversion process has been confirmed by power dependence measurements and its slope value was found to be 1.85, 1.72 for green and red emissions, respectively. On addition of ZnO, the intensity of these emissions is enhanced several times. The reason behind the enhancement is discussed with the help of the emitting level lifetime. An interesting dual mode property (upconversion and downconversion) to the same material has been observed on excitation with 532 nm laser source.
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Affiliation(s)
- R V Yadav
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
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Rai M, Mishra K, Singh SK, Verma RK, Rai SB. Infrared to visible upconversion in Ho³+/Yb³+ co-doped Y₂ O₃ phosphor: effect of laser input power and external temperature. Spectrochim Acta A Mol Biomol Spectrosc 2012; 97:825-829. [PMID: 22902580 DOI: 10.1016/j.saa.2012.07.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 07/14/2012] [Accepted: 07/17/2012] [Indexed: 06/01/2023]
Abstract
In the present paper, Ho(3+) doped and Ho(3+)/Yb(3+) co-doped Y(2)O(3) phosphors have been synthesized using solution combustion technique and characterized for its structure and upconversion (UC) fluorescence as a function of Yb(3+) concentration. Effect of a variation in laser input power and external temperature on the UC emission intensity has been studied to explore the UC mechanism and temperature dependent behavior of the phosphor, respectively. On excitation with near infrared (NIR) light (976 nm), the phosphor emits strong green emission along with relatively weak emission bands in red and blue regions at 553, 670 and 497 nm due to (5)S(2)→(5)I(8), (5)F(5)→(5)I(8) and (5)F(3)→(5)I(8), respectively. The emission shows a decrease in intensity with an increase in external temperature, however contrary to the normal behavior of Ho(3+), no significant change in the FIR (fluorescence intensity ratio) of (5)F(4)→(5)I(8) and (5)S(2)→(5)I(8) transitions is noted in the present host. This peculiar behavior of the sample with external temperature has been explained by temperature dependent lifetime study of the thermally coupled levels.
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Affiliation(s)
- Monika Rai
- Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
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Verma RS, Verma RK, Chauhan A, Yadav AK. Seasonal Variation in Essential Oil Content and Composition of Thyme, Thymus serpyllum L. Cultivated in Uttarakhand Hills. Indian J Pharm Sci 2012; 73:233-5. [PMID: 22303071 PMCID: PMC3267312 DOI: 10.4103/0250-474x.91570] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 02/17/2011] [Accepted: 03/17/2011] [Indexed: 12/04/2022] Open
Abstract
Thymus serpyllum L. grown in Kumaon region of Western Himalaya was investigated for essential oil content and composition in different seasons. The oils of fresh samples were obtained by hydrodistillation. The yield of essential oil (% v/w) during different seasons varied from 0.07 to 0.28% with the highest in summer season, at vegetative stage. The oils were analyzed by GC and GC-MS. Major components of all the samples were thymol (19.4-60.1%), γ-terpinene (0.3-13.8%) and p-cymene (3.5-10.4%). The results clearly indicated that season has significant effect on quality and quantity of thyme oil.
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Affiliation(s)
- R S Verma
- Central Institute of Medicinal and Aromatic Plants (CIMAP, CSIR), Research Centre, Pantnagar, P.O.- Dairy Farm Nagla, Udham Singh Nagar, Uttarakhand-263 149, India
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Prasad R, Verma SK, Garg R, Jain A, Anand SC, Hosmane GB, Verma RK, Kushwaha NS, Kant S. Drug susceptibility pattern of Mycobacterium tuberculosis isolates from patients of category-II failure of pulmonary tuberculosis under directly observed treatment short-course from north India. Biosci Trends 2012; 6:110-4. [PMID: 22890158 DOI: 10.5582/bst.2012.v6.3.110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The major contributing factors for the causation of treatment failure in cases of pulmonary tuberculosis under Category-II directly observed treatment short-course treatment (DOTS) are treatment after default, poor treatment compliance, and development of multi-drug resistant (MDR) tuberculosis. The objective of the present study is to find out the demographic profile and drug susceptibility pattern in Category-II failure patients of pulmonary tuberculosis under Revised National Tuberculosis Control Programme (RNTCP) of India. Two hundred and twenty four patients with Category-II treatment failure of pulmonary tuberculosis were enrolled from Department of Pulmonary Medicine, at Chatrapati Sahuji Maharaj Medical University, UP, Lucknow, India, from August 2003 to July 2008. Their complete bacteriological assessment in terms of sputum smear for acid-fast bacilli, culture for Mycobacterium tuberculosis and drug sensitivity pattern were done in the Department of Microbiology. Among 224 patients, 16 (7.1%) patients were lost to follow-up and the final analysis was done among 208 (92.8%) cases. The reasons for inclusion of these 224 cases in the Category II regimen were treatment failure in the previous regimen (n = 75, 33%), default in 57% (n = 129 cases), and relapse in 8.9% (n = 20 cases). Among 208 patients, culture was positive in 170 (81.7%) cases, negative in 17 (8.1%) cases and contaminated in 21 (10%) cases. The drug sensitivity pattern of culture positive cases of Category-II failure patients revealed that, 58.2% (n = 99) had MDR tuberculosis and 40.5% (n = 69) were resistant but were non-MDR tuberculosis and 1.1 % (n = 2) cases were sensitive to all first line antituberculosis drugs.
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Affiliation(s)
- R Prasad
- Department of Pulmonary Medicine, Chatrapati Sahuji Maharaj Medical University (Earlier KGMU), UP, Lucknow, India
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Kumar Verma R, Shivaprakash MR, Shanker A, Panda NK. Subcutaneous zygomycosis of the cervicotemporal region: Due to Basidiobolus ranaram. Med Mycol Case Rep 2012; 1:59-62. [PMID: 24371740 PMCID: PMC3854634 DOI: 10.1016/j.mmcr.2012.07.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 07/27/2012] [Accepted: 07/30/2012] [Indexed: 11/21/2022] Open
Abstract
Basidiobolomycosis is a rare chronic subcutaneous infection caused by Basidiobolus ranarum. The disease usually occurs in children, less often in adolescent and rarely in adults. Males are more frequently affected than females. We report a case of subcutaneous zygomycosis of head and neck region caused by B. ranaram, in an immunocompetent adult female presenting with nontender firm swelling over the nape of neck and temporo-parietal region. The diagnosis was confirmed by histopathology, microbiology (culture) and DNA sequencing of molecular technique (sequencing). The patient was successfully treated with amphotericin B and potassium iodide.
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Affiliation(s)
- Roshan Kumar Verma
- Department of Otolaryngology Head and Neck Surgery, PGIMER, Chandigarh 160012, India
| | - M R Shivaprakash
- Department of Medical Microbiology, PGIMER, Chandigarh 160012, India
| | - Amit Shanker
- Department of Otolaryngology Head and Neck Surgery, PGIMER, Chandigarh 160012, India
| | - Naresh K Panda
- Department of Otolaryngology Head and Neck Surgery, PGIMER, Chandigarh 160012, India
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Kesavalu L, Lucas AR, Verma RK, Liu L, Dai E, Sampson E, Progulske-Fox A. Increased atherogenesis during Streptococcus mutans infection in ApoE-null mice. J Dent Res 2012; 91:255-60. [PMID: 22262633 DOI: 10.1177/0022034511435101] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Streptococcus mutans, a dental caries pathogen, also causes endocarditis and is detected in atheroscelerotic plaque. We investigated the potential for an invasive strain of S. mutans, OMZ175, to accelerate plaque growth in apolipoprotein E deficient (ApoE(null)) mice without and with balloon angioplasty (BA) injury, a model of restenosis. ApoE(null) mice were divided into 4 groups (N = 10), 2 with and 2 without BA. One each of the BA and non-BA groups was infected with S. mutans (Sm). S. mutans DNA, plaque area, inflammatory cell invasion, and Toll-like receptor (TLR) expression were measured at 6-20 weeks post-infection. S. mutans genomic DNA was detected in the aorta, liver, spleen, and heart. Plaque growth was significantly increased in infected mice with BA (Sm+BA) vs. those in the non-infected groups (p < 0.03). Plaque size was increased after infection without BA (Sm), but did not reach significance. Aortic specimens from both S. mutans and Sm+BA groups displayed increased numbers of macrophages, and TLR4 expression was increased in BA mice. In conclusion, S. mutans infection accelerated plaque growth, macrophage invasion, and TLR4 expression after angioplasty. S. mutans may also be associated with atherosclerotic plaque growth in non-injured arteries.
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Affiliation(s)
- L Kesavalu
- Department of Periodontology, University of Florida, Gainesville, FL 32610-0424, USA.
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Bhagat S, Verma RK, Panda NK. Extranasopharyneal angiofibroma in an adult: a rare presentation. Indian J Otolaryngol Head Neck Surg 2011; 63:25-6. [PMID: 22754828 DOI: 10.1007/s12070-011-0178-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Accepted: 08/21/2008] [Indexed: 11/29/2022] Open
Abstract
Juvenile nasopharyngeal angiofibromas are benign but locally aggressive tumors of nasopharynx seen exclusively in adolescent males. Angiofibromas arising in sites other than nasopharynx is very rare. Maxilla is the most frequent site of origin. Extra nasopharyngeal angiofibromas of adult is extremely rare. We present a case of extra nasopharnygeal angiofibroma arising from maxillary sinus in an adult patient which was excised successfully.
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Affiliation(s)
- Sanjeev Bhagat
- Department of Otolaryngology, Head and Neck Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012 India
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Verma RK, Gupta G, Bal A, Yadav J. Primary giant cell rich osteosarcoma of maxilla: an unusual case report. J Maxillofac Oral Surg 2011; 10:159-62. [PMID: 22654370 DOI: 10.1007/s12663-010-0066-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 07/10/2010] [Indexed: 11/26/2022] Open
Abstract
Giant cell rich osteosarcomas, histological variant of conventional osteosarcomas account for 3% of all cases of osteosarcomas and most of them are arise from the appendicular skeleton. Giant cell rich osteosarcomas have been rarely reported in the head and neck region. This is the first case report of giant cell rich variant of osteosarcoma in the maxilla. It is important to recognize this variant, as its prognosis is worse as compared to conventional osteosarcomas of the head and neck region. We here present a case of giant cell rich variant of osteosarcoma of the maxilla and along with its characteristic radiological and histopathological picture.
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Verma RK, Bhattacharyya I, Sevilla A, Lieberman I, Pola S, Nair M, Wallet SM, Aukhil I, Kesavalu L. Virulence of major periodontal pathogens and lack of humoral immune protection in a rat model of periodontal disease. Oral Dis 2010; 16:686-95. [PMID: 20846155 DOI: 10.1111/j.1601-0825.2010.01678.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE This study was designed to test the hypothesis that periodontal pathogens Tannerella forsythia and Porphyromonas gingivalis are synergistic in terms of virulence potential using a model of mixed-microbial infection in rats. MATERIALS AND METHODS Three groups of rats were infected orally with either T. forsythia or P. gingivalis in mono-bacterial infections or as mixed-microbial infections for 12 weeks and a sham-infected group were used as a control. This study examined bacterial infection, inflammation, immunity, and alveolar bone loss changes with disease progression. RESULTS Tannerella forsythia and P. gingivalis genomic DNA was detected in microbial samples from infected rats by PCR indicating their colonization in the rat oral cavity. Primary infection induced significantly high IgG, IgG2b, IgG1, and IgG2a antibody levels indicating activation of mixed Th1 and Th2 immune responses. Rats infected with the mixed-microbial consortium exhibited significantly increased palatal horizontal and interproximal alveolar bone loss. Histological examinations indicated significant hyperplasia of the gingival epithelium with moderate inflammatory infiltration and apical migration of junctional epithelium. The results observed differ compared to uninfected controls. CONCLUSION Our results indicated that T. forsythia and P. gingivalis exhibit virulence, but not virulence synergy, resulting in the immuno-inflammatory responses and lack of humoral immune protection during periodontitis in rats.
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Affiliation(s)
- R K Verma
- Department of Periodontology, Collegeof Dentistry, University of Florida, Gainesville, FL 32610, USA
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Bakthavatchalu V, Meka A, Sathishkumar S, Lopez MC, Verma RK, Wallet SM, Bhattacharyya I, Boyce BF, Mans JJ, Lamont RJ, Baker HV, Ebersole JL, Kesavalu L. Molecular characterization of Treponema denticola infection-induced bone and soft tissue transcriptional profiles. Mol Oral Microbiol 2010; 25:260-74. [PMID: 20618700 DOI: 10.1111/j.2041-1014.2010.00575.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Treponema denticola is associated with subgingival biofilms in adult periodontitis and with acute necrotizing ulcerative gingivitis. However, the molecular mechanisms by which T. denticola impacts periodontal inflammation and alveolar bone resorption remain unclear. Here, we examined changes in the host transcriptional profiles during a T. denticola infection using a murine calvarial model of inflammation and bone resorption. T. denticola was injected into the subcutaneous soft tissue over the calvaria of BALB/c mice for 3 days, after which the soft tissues and the calvarial bones were excised. RNA was isolated and analysed for transcript profiling using Murine GeneChip arrays. Following T. denticola infection, 2905 and 1234 genes in the infected calvarial bones and soft tissues, respectively, were differentially expressed (P <or= 0.05). Biological pathways significantly impacted by T. denticola infection in calvarial bone and calvarial tissue included leukocyte transendothelial migration, cell adhesion (immune system) molecules, cell cycle, extracellular matrix-receptor interaction, focal adhesion, B-cell receptor signaling and transforming growth factor-beta signaling pathways resulting in proinflammatory, chemotactic effects, and T-cell stimulation. In conclusion, localized T. denticola infection differentially induces transcription of a broad array of host genes, the profiles of which differed between inflamed calvarial bone and soft tissues.
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Affiliation(s)
- V Bakthavatchalu
- Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, KY, USA
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Meka A, Bakthavatchalu V, Sathishkumar S, Lopez MC, Verma RK, Wallet SM, Bhattacharyya I, Boyce BF, Handfield M, Lamont RJ, Baker HV, Ebersole JL, Kesavalu L. Porphyromonas gingivalis infection-induced tissue and bone transcriptional profiles. Mol Oral Microbiol 2010; 25:61-74. [PMID: 20331794 DOI: 10.1111/j.2041-1014.2009.00555.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Porphyromonas gingivalis has been associated with subgingival biofilms in adult periodontitis. However, the molecular mechanisms of its contribution to chronic gingival inflammation and loss of periodontal structural integrity remain unclear. This investigation aimed to examine changes in the host transcriptional profiles during a P. gingivalis infection using a murine calvarial model of inflammation and bone resorption. P. gingivalis FDC 381 was injected into the subcutaneous soft tissue over the calvaria of BALB/c mice for 3 days, after which the soft tissues and calvarial bones were excised. RNA was isolated from infected soft tissues and calvarial bones and was analysed for transcript profiles using Murine GeneChip((R)) arrays to provide a molecular profile of the events that occur following infection of these tissues. After P. gingivalis infection, 6452 and 2341 probe sets in the infected soft tissues and calvarial bone, respectively, were differentially expressed (P </= 0.05). Biological pathways significantly impacted by P. gingivalis infection in tissues and calvarial bone included cell adhesion (immune system) molecules, Toll-like receptors, B-cell receptor signaling, transforming growth factor-beta cytokine family receptor signaling, and major histocompatibility complex class II antigen processing pathways resulting in proinflammatory, chemotactic effects, T-cell stimulation, and downregulation of antiviral and T-cell chemotactic effects. P. gingivalis-induced inflammation activated osteoclasts, leading to local bone resorption. This is the first in vivo evidence that localized P. gingivalis infection differentially induces transcription of a broad array of host genes, the profiles of which differed between inflamed soft tissues and calvarial bone.
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Affiliation(s)
- A Meka
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA
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Abstract
Forty patients of aluminum phosphide poisoning who were admitted to the ICU of Sir Sunder Lal Hospital, Banaras Hindu University, were studied. Restlessness, excessive thirst, shock, arrhythmias, tachypnoea, and severe metabolic acidosis were the common clinical findings. Only repeated and full correction with intravenous sodium bicarbonate was able to cope up with the severity and rapidity of acidosis. There was no significant change in blood pressure, pulse rate, and respiratory rate after full correction but gradually pulse and systolic blood pressure settled after ionotropic support in the survivors. There was significant improvement from 30.36% in the case when only half correction was done, as has been the common practice, to 57.5%, when full correction of metabolic acidosis was done.
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Affiliation(s)
- S Jaiswal
- Department of Anesthesiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi - 221 005, India
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Verma RK. Bibliometric study of Indian S&T publications as reflected in Indian Science Abstracts. Collnet Journal of Scientometrics and Information Management 2009. [DOI: 10.1080/09737766.2009.10700873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Khurana P, Agarwal A, Verma RK, Gupta PK. Comparison of Midazolam and Propofol for BIS-Guided Sedation During Regional Anaesthesia. Indian J Anaesth 2009; 53:662-6. [PMID: 20640093 PMCID: PMC2900075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2009] [Indexed: 10/28/2022] Open
Abstract
SUMMARY Regional anaesthesia has become an important anaesthetic technique. Effective sedation is an essential for regional techniques too. This study compares midazolam and propofol in terms of onset & recovery from sedation, dosage and side effects of both the drugs using Bispectral Index monitoring. Ninety eight patients were randomly divided into two groups,one group recieved midazolam infusion while the other recieved propofol infusion until BIS reached 75. We observed Time to reach desired sedation, HR, MABP, time for recovery, dose to reach sedation and for maintenance of sedation and side effects if any. The time to reach required sedation was 11 min in Midazolam group(Group I) while it was 6 min in Propofol group(Group II) (p=0.0). Fall in MABP was greater with propofol. Recovery in with midazolam was slower than with propofol (18.6 +/- 6.5 vs 10.10+/-3.65 min) (p=0.00). We concluded that both midazolam and propofol are effective sedatives, but onset and offset was quicker with propofol, while midazolam was more cardiostable.
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Affiliation(s)
| | - Ankit Agarwal
- Sr.Resident, Deptt. Of Anaesthesiology, BHU, Varanasi,Correspondence to: Ankit Agarwal, Deptt. Of Anaesthesiology, BHU, Varanasi,
| | - RK Verma
- Reader, Deptt. Of Anaesthesiology, BHU, Varanasi
| | - PK Gupta
- Professor, Deptt. Of Anaesthesiology, BHU, Varanasi
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Verma RK, Kumar K, Rai SB. UV/blue upconversion in Nd3+:TeO2 glass, effect of modifiers and heat treatment on the fluorescence bands. Spectrochim Acta A Mol Biomol Spectrosc 2009; 74:776-780. [PMID: 19747875 DOI: 10.1016/j.saa.2009.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Revised: 07/23/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
Upconversion (UC) emissions in UV/blue region have been observed in Nd(3+) doped tellurite glass on 532 nm excitation. The UC bands have been observed at 360, 387, 417 and 452 nm due to the (4)D(3/2)-->(4)I(9/2), (4)D(3/2)-->(4)I(11/2), (4)D(3/2)-->(4)I(13/2) and (4)D(3/2)-->(4)I(15/2) transitions, respectively and they show two photon character. The effect of BaCO(3), BaF(2) and BaCl(2) glass modifiers on the UC efficiency has been studied and Judd-Ofelt intensity parameters have been calculated and compared. The BaCl(2) modified glass showed maximum UC intensity among the three modifiers and this enhancement in UC intensity has been related to the reduction in average phonon frequency of the glass sample. Heat treatments of the BaF(2) and BaCl(2) modified samples also show enhancement in UC intensity while the BaCO(3) modified sample has no such effect. Lifetime of the (4)D(3/2) level has been measured to understand the mechanism responsible for UC emission. Temperature dependent fluorescence studies have been done on the (4)F(3/2), (4)F(5/2) and (2)S(3/2) emitting levels and results show that Nd(3+) doped tellurite glass can be used as a temperature sensor.
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Affiliation(s)
- R K Verma
- Laser Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India
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Rawat J, Verma RK, Sindhwani G, Dua R, Negi G. Perianal tuberculous ulcer in an immunocompetent patient. Indian J Tuberc 2009; 56:229-231. [PMID: 20469737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Perianal tuberculosis, without the presence of any previous or active pulmonary infection, is extremely rare. A wide range of differential diagnosis for perianal ulcers might be one reason for a possible delay in establishing this diagnosis.
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Affiliation(s)
- Jagdish Rawat
- Department of Pulmonary Medicine, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand.
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Collumbien M, Qureshi AA, Mayhew SH, Rizvi N, Rabbani A, Rolfe B, Verma RK, Rehman H, Naveed-i-Rahat. Understanding the context of male and transgender sex work using peer ethnography. Sex Transm Infect 2009; 85 Suppl 2:ii3-7. [DOI: 10.1136/sti.2008.033571] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Srivastava A, Tripathi AK, Pandey R, Verma RK, Gupta MM. Quantitative Determination of Reserpine, Ajmaline, and Ajmalicine in Rauvolfia serpentina by Reversed- Phase High-Performance Liquid Chromatography. J Chromatogr Sci 2006; 44:557-60. [PMID: 17059683 DOI: 10.1093/chromsci/44.9.557] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
A sensitive and reproducible reversed-phase high-performance liquid chromatography (HPLC) method using photodiode array detection is established for the simultaneous quantitation of important root alkaloids of Rauvolfia serpentina, namely, reserpine, ajmaline, and ajmalicine. A Chromolith Performance RP-18e column (100 x 4.6-mm i.d.) and a binary gradient mobile phase composed of 0.01 M (pH 3.5) phosphate buffer (NaH(2)PO(4)) containing 0.5% glacial acetic acid and acetonitrile are used. Analysis is run at a flow rate of 1.0 mL/min with the detector operated at a wavelength of 254 nm. The calibration curves are linear over a concentration range of 1-20 microg/mL (r = 1.000) for all the alkaloids. The various other aspects of analysis (i.e., peak purity, similarity, recovery, and repeatability) are also validated. For the three components, the recoveries are found to be 98.27%, 97.03%, and 98.38%, respectively. The limits of detection are 6, 4, and 8 microg/mL for ajmaline, ajmalicine, and reserpine, respectively, and the limits of quantitation are 19, 12, and 23 microg/mL for ajmaline, ajmalicine, and reserpine, respectively. The developed method is simple, reproducible, and easy to operate. It is useful for the evaluation of R. serpentina.
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Affiliation(s)
- A Srivastava
- Analytical Chemistry Division, Central Institute of Medicinal and Aromatic Plants, P.O.-CIMAP, Lucknow 226015, India
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Gupta MM, Singh DV, Tripathi AK, Pandey R, Verma RK, Singh S, Shasany AK, Khanuja SPS. Simultaneous Determination of Vincristine, Vinblastine, Catharanthine, and Vindoline in Leaves of Catharanthus roseus by High-Performance Liquid Chromatography. J Chromatogr Sci 2005; 43:450-3. [PMID: 16212789 DOI: 10.1093/chromsci/43.9.450] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
A simple reversed-phase liquid chromatographic method is developed for the simultaneous quantitation of the anticancerous drugs vincristine, vinblastine, and their precursors catharanthine and vindoline using a Merck Chromolith Performance reversed-phase high-performance liquid chromatography column. A better resolution is obtained in comparison with available particulate-type C18 columns. The column provides good reproducibility and peak symmetry. Chromatography is carried isocratically with a mobile phase of acetonitrile-0.1M phosphate buffer containing 0.5% glacial acetic acid (21:79, v/v; pH 3.5) at a flow rate of 1.2 mL/min and UV detection at 254 nm. Parameters such as linearity, limits of quantitation (LOQ) and detection (LOD), precision, accuracy, recovery, and robustness are studied. The method is selective and linear for alkaloid concentration in the range 0.25 microg-25 microg/mL. The LOQ and LOD are 25, 46, 56, and 32 microg/mL and 8, 14, 18, and 10 microg/mL, respectively. The results of accuracy studies are good. Values for coefficient of variation are 2.50, 1.82, 1.33, and 1.13, respectively. The percent recovery of the alkaloids was found to be 96%, 97%, 98%, and 98%, respectively. Peak purity and homogeneity of these compounds in plant extract is studied using a photodiode-array detector. This simple and rapid method of analysis is applied for the determination of these alkaloids in a large number of leaf extracts of Catharanthus roseus..
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Affiliation(s)
- M M Gupta
- Analytical Testing Laboratory, Central Institute of Medicinal and Aromatic Plants, Lucknow 226 015, India.
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Verma RK, Pfeffer JG, Günther RW, Schmitz-Rode T. Entwicklung und tierexperimentelle Testung eines perkutanen temporären Stentsystems für Pulmonalarterien bei zentraler Lungenembolie. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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49
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Verma RK, Pfeffer JG, Günther RW, Schmitz-Rode T. Entwicklung und tierexperimentelle Testung eines perkutanen Thrombektomie-Kathetersystems. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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50
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Affiliation(s)
- A K Mehta
- Classified Specialist (ENT), Command Hospital (Western Command), Chandimandir
| | - S S Panwar
- Senior Advisor (ENT & Neuro Otology), Army Hospital (R & R), Delhi Cantt
| | - R K Verma
- Classified Specialist (ENT), Command Hospital (Western Command), Chandimandir
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