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El Mobadder M, Grzech-Lesniak Z, El Mobadder W, Rifai M, Ghandour M, Nammour S. Management of Medication-Related Osteonecrosis of the Jaw with Photobiomodulation and Minimal Surgical Intervention. Dent J (Basel) 2023; 11:dj11050127. [PMID: 37232778 DOI: 10.3390/dj11050127] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 01/12/2023] [Revised: 04/21/2023] [Accepted: 05/04/2023] [Indexed: 05/27/2023] Open
Abstract
Medication-related osteonecrosis of the jaw (MRONJ) is a relatively common pathology occurring in around 5% of patients taking bisphosphate and other antiresorptive or anti-angiogenic medications. Despite the efforts, as of today there is still no consensus on its management. In this case report, the successful management of stage II MRONJ was performed for an eighty-three-year-old female patient suffering from pain and alteration in her normal oral functions (swallowing and phonation). The treatment consisted of three sessions of photobiomodulation therapy (PBM), followed by minimal surgical intervention and three other sessions of PBM. PBM was applied on the sites of osteonecrosis with the follow parameters: 4 J/cm2; a power of 50 mW; 8 mm applicator diameter; a continuous contact mode. Irradiation was performed on three points, including the vestibular, occlusal and lingual parts of each of the bone exposure areas. Each point was irradiated for 40 s, and, in total, nine points were made per session, and nine sessions were conducted. To assess the pain, a visual analogue scale was used in which zero represented no pain at all and ten represented the greatest pain. At the first session and before any intervention, the patient stated that her pain was 8 out of 10. At the end of the treatment, a significant reduction in VAS was noted (2/10) and, clinically, a healing of the soft tissue in the previously exposed bone was observed. This case report suggests that the combination of PBM with surgical intervention is promising in the management of MRONJ.
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Affiliation(s)
- Marwan El Mobadder
- Dental Surgery Department, Wroclaw Medical University, 50-425 Wroclaw, Poland
- Department of Dental Sciences, Faculty of Medicine, University of Liege, 4000 Liege, Belgium
| | | | - Wassim El Mobadder
- Department of Endodontics, Dental Specialist' DS Polyclinics, Saida 1600, Lebanon
| | - Mohamad Rifai
- Department of Periodontology, Faculty of Dental Medicine, Lebanese University, Beirut 6573/14, Lebanon
| | - Maher Ghandour
- Department of Orthopedics, Heidelberg University Hospital, 69120 Heidelberg, Germany
| | - Samir Nammour
- Department of Dental Sciences, Faculty of Medicine, University of Liege, 4000 Liege, Belgium
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Rifai M, Aoun G, Majzoub Z. Evaluation of the Papillary Gingival Vasculature in Smokers and Nonsmokers with Chronic Periodontitis: A Clinical In Vivo Study. J Int Soc Prev Community Dent 2020; 10:368-375. [PMID: 32802785 PMCID: PMC7402256 DOI: 10.4103/jispcd.jispcd_134_20] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/07/2020] [Accepted: 04/14/2020] [Indexed: 11/29/2022] Open
Abstract
Aim: Cigarette smoking has been recognized as an important risk factor in periodontal diseases. One of the suggested mechanisms behind this association is that nicotine alters the microcirculation and causes vasoconstriction and reduced blood flow through the periodontal tissues. Scarce information is currently available relative to the microvascular alterations associated with smoking and the distribution of capillaries through the various areas of the gingival tissues. The aims of this study were to assess, in human interproximal gingival biopsies, the number and diameter of gingival capillaries in periodontally affected smokers and nonsmokers using the CD34 immunohistochemical staining method. The pattern of distribution of vessels in the different areas of the gingival tissues was also assessed. Materials and Methods: Systemically healthy patients with moderate chronic periodontitis and ranging in age between 30 and 60 years were recruited for the study from the patient population attending the Periodontology Department of the Faculty of Dental Medicine at the Lebanese University of Beirut. The patients were selected to have a group of 10 patients (Group SP) of smokers (>10 cigarettes/day for the last 10 years) and a second group (Group NP) consisting of nonsmoking periodontally affected patients. Three to four weeks following initial preparation, one interproximal gingival biopsy was obtained from each patient. Immunohistochemical staining with CD34 mouse monoclonal antibody was used to identify the endothelial cells of the blood vessels within each sample. Twelve biopsy samples (five in Group NP and seven in Group SP) were chosen for the measurement of the number and diameter of vessels in three regions of the connective tissue of the biopsy under a blinded protocol. Results: In the two groups, the quantitative distribution of small, medium, and large vessels followed a similar trend with the number of small vessels being significantly greater than both medium and large vessels. Small vessels prevailed in the peripheral regions, whereas large vessels were more abundant in the deeper connective tissue areas. The total number of vessels seemed unaffected by chronic cigarette smoking in both groups in the entire biopsy area and in the separate connective tissue regions. Quantitative alteration in the total number of gingival capillaries was not observed in chronic smokers. A redistribution of small and large vessels in the superficial and deeper connective tissue areas of the gingival papilla was noted as a result of smoking in periodontal patients. Conclusion: The quantitative distribution of small, medium, and large vessels follows a similar trend with the content in small vessels being significantly more important than both medium and large vessels. Smoking and periodontitis result in a redistribution of small and large vessels in the superficial and deeper connective tissue areas of the gingival papilla compared to nonsmoking periodontal patients. The significance and clinical implications of such rearrangement of vasculature within the gingival tissue need to be further investigated.
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Affiliation(s)
- Mohamad Rifai
- Department of Periodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Georges Aoun
- Department of Oral Medicine and Maxillofacial Radiology, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Zeina Majzoub
- Department of Periodontics and Research, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
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Abstract
AIM The aim of this study was to characterize the surface of zirconia subjected to different treatments and evaluate its effect on cell adhesion and proliferation. MATERIALS AND METHODS A total of 80 zirconia disks were divided into four groups (n = 20) according to the surface treatments used: group I: as-sintered (AS), no surface treatment applied; group II: abrasion treatment applied using Rocatec (ROC; 3M ESPE) system with silica-coated alumina powder of grit size 110 μm; group III: erbium, chromium:yttrium, scandium, gallium, garnet (Er, Cr:YSGG) laser (LAS; BIOLASE) was used at a frequency of 20 Hz and output power of 3 W; and group IV: specimens were subjected to the selective infiltration etching (SIE) technique. Surface characterization was evaluated for the different groups (roughness, hardness, and morphology), and cell behavior (adhesion and proliferation) was tested (a = 0.05). RESULTS The ROC group reported a significant increase in surface roughness (2.201 ± 0.352) and Vickers hardness (1758 ± 16.6) compared with the other surface treatments. The SIE surface-treated group reported a significantly higher number of cells (64.5 ± 2.6 and 53.5 ± 2.2 respectively) compared with the other surface-treated groups. CONCLUSION The SIE is a promising surface treatment for zirconia that significantly enhances cell adhesion and osseointegration. CLINICAL SIGNIFICANCE The SIE treatment of zirconia implants may help in a faster and better osseointegration.
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Affiliation(s)
- Wadih Nassif
- Department of Prosthodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon, Phone: +9613686787, e-mail:
| | - Mohamad Rifai
- Department of Prosthodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon
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Aoun G, Nasseh I, Sokhn S, Rifai M. Lingual Foramina and Canals of the Mandible: Anatomic Variations in a Lebanese Population. J Clin Imaging Sci 2017; 7:16. [PMID: 28589055 PMCID: PMC5433650 DOI: 10.4103/jcis.jcis_15_17] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 02/18/2017] [Accepted: 03/16/2017] [Indexed: 11/24/2022] Open
Abstract
Objective: The aim of this study was to evaluate the mandibular lingual foramina (LF) and canals and their anatomic variations using cone-beam computed tomography (CBCT) technology in a Lebanese population. Materials and Methods: In this study, we analyzed CBCT images of 90 adult Lebanese patients (41 males and 49 females). We assessed the number and location of the LF. In additional, we measured: (a) The distance from both the alveolar crest and the inferior border of the mandible to the LF and (b) the length of the lingual canals (LCs). The data obtained was analyzed statistically using Shapiro–Wilk normality test, t-test, Chi-square, and Fisher's exact tests. Statistical significance was set at 0.05. Results: In our sample, the LF and canals were present in 93.33% of the CBCT analyzed, and the majority (76.64%) was located above the genial tubercles. The distance from the foramen of the superior and the inferior LCs to the alveolar crest was 16.24 ± 2.82 mm and 25.49 ± 2.43 mm, respectively. The distance from the foramen of the superior canal to the inferior border of the mandible was 14 ± 2.32 mm. The mean length of the superior canal was 5.81 ± 1.6 mm and 4.25 ± 1.2 mm for the inferior one. There were no gender-related differences in the anatomic characteristics of the LF and canals except for the distance measured from the superior canal foramina to the alveolar crest where the measurement was significantly greater in males compared to females. Neither the number of canals nor the positions of the foramina were different between males and females. Conclusion: Within the limits of this study, we concluded that in our sample of Lebanese adults, there was substantial variability in the LF and canals anatomy and location.
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Affiliation(s)
- Georges Aoun
- Department of Oral Pathology and Diagnosis, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Ibrahim Nasseh
- Department of Dentomaxillofacial Radiology and Imaging, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Sayde Sokhn
- Department of Dentomaxillofacial Radiology and Imaging, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Mohamad Rifai
- Department of Periodontology, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
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Lachhab F, Rifai M, Ouald Ali H, Sayah R, Rhissassi J, Benlafquih C, Bakkali A, Benyoussef H, Messouak M, Rahali M, Cheikhaoui Y, Slaoui A, Ahid S, Belhaj S, Maazouzi W. [Contribution of closed mitral commissurotomy in the surgery of rheumatic mitral stenosis]. Ann Cardiol Angeiol (Paris) 2011; 61:69-73. [PMID: 21890105 DOI: 10.1016/j.ancard.2011.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Accepted: 07/24/2011] [Indexed: 11/24/2022]
Abstract
UNLABELLED The objective of this work was to study the indications, techniques and results of closed heart mitral commissurotomy in patients with rheumatic mitral stenosis in Morocco. METHODS All patients who had undergone closed heart mitral commissurotomy for rheumatic mitral stenosis, operated between 1999 and 2008 were collected in this study. Mitral stenosis was diagnosed and evaluated using Doppler echocardiography. Patients with commissural calcification, severe mitral regurgitation, and surgical tricuspid or aortic valvular disease were excluded from this study. RESULTS Six hundred and twenty-five patients have been collected. 62.2% were young with an age between 18 and 35 years and 491 (78.8%) were female. Seventy-nine percent of patients had stage III or IV NYHA and were in sinus regular rhythm. The closed heart mitral commissurotomy was performed for all patients through a left thoracotomy using either digital or dual dilatation. The mitral area was significantly increased postoperatively to 2.11 ± 0.32 with 100% opening of the anterior commissure, while the posterior commissure was opened only for 93.7% of patients. There were nine perioperative deaths (4.9%) and all patients who died had severe mitral stenosis (<0.8 cm(2)) with an elevated systolic pulmonary artery pressure (>60 mmHg). CONCLUSION The closed heart mitral commissurotomy provides excellent results in young patients with rheumatic mitral stenosis.
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Affiliation(s)
- F Lachhab
- Département de chirurgie cardio-vasculaire A, hôpital Ibn Sina, Rabat, Maroc.
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Abstract
In this study we introduce a rapid procedure to identify Mycobacterium abscessus (types I and II) and M. chelonae using LightCycler-based analysis of the hsp65 gene. Results from 36 clinical strains were compared with hsp65 gene restriction analysis and biochemical profiles of bacilli. As all three methods yielded identical results for each isolate, this procedure offers an excellent alternative to previously established nucleic acid amplification-based techniques for the diagnosis of mycobacterial diseases.
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Affiliation(s)
- L Sedlacek
- Department of Medical Microbiology and Hospital Epidemiology, Medical School Hannover, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
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Abstract
OBJECTIVES To study the behavior of anterior commissure carcinoma regarding its tendency for cartilage invasion. METHODS Histopathological examination of the region of the anterior commissure (AC) was done with whole organ section in 30 randomly selected specimens. Serial sections were prepared and examined histopathologically for evidence of microscopic cartilage invasion in the region of the AC. RESULTS Microscopic involvement of the thyroid cartilage was detected in the 30 sections studied. CONCLUSION Whether recurrence was de novo or initiated by residual malignant cells, it is mandatory to excise the anterior portion of the thyroid cartilage with the tumor-bearing mucosa.
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Affiliation(s)
- M Rifai
- Otorhinolarygology Department, Kasr El-Aini School of Medicine, Cairo University, Egypt
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8
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Rinder H, Dobner P, Feldmann K, Rifai M, Bretzel G, Rüsch-Gerdes S, Löscher T. Disequilibria in the distribution of rpoB alleles in rifampicin-resistant M. tuberculosis isolates from Germany and Sierra Leone. Microb Drug Resist 2000; 3:195-7. [PMID: 9185147 DOI: 10.1089/mdr.1997.3.195] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 02/04/2023] Open
Abstract
The effectiveness of culture-independent resistance predictions by molecular techniques is dependent on the number and the frequency of accessible resistance-associated genomic mutations. We have characterized an rpoB gene region involved in rifampicin resistance in 49 Mycobacterium tuberculosis isolates resistant to rifampicin from Germany and Sierra Leone. The determined frequencies of mutations differed between both countries of origins as well as with respect to previously reported distributions of resistance mutations. It is concluded that at least for some isolates the acquisition of mutations leading to rifampicin resistance in clinical samples of M. tuberculosis is a non-random process which may lead to a geographical and temporal dependence of the sensitivities of molecular typing techniques for rifampicin resistance predictions.
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Affiliation(s)
- H Rinder
- Department of Infectious Diseases and Tropical Medicine, University of Munich, Germany
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Rinder H, Feldmann K, Tortoli E, Grosset J, Casal M, Richter E, Rifai M, Jarlier V, Vaquero M, Rüsch-Gerdes S, Cambau E, Gutierrez J, Löscher T. Culture-independent prediction of isoniazid resistance in Mycobacterium tuberculosis by katG gene analysis directly from sputum samples. Mol Diagn 1999; 4:145-52. [PMID: 10462629 DOI: 10.1016/s1084-8592(99)80038-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The molecular prediction of isoniazid (INH) resistance in Mycobacterium tuberculosis is hampered by the need for specialized equipment, expertise, high costs, a limited range of detectable mutations, or several of these factors. The rationale for the study was to find a practical alternative and to demonstrate generally valid problems. METHODS AND RESULTS DNA extracted from decontaminated sputum pellets was used to amplify a 0.26 kb target sequence within the katG gene. Mutations of codon 315, frequently found in isoniazid-resistant isolates, could be discriminated in a simple agarose minigel format following an AciI digest of the nested polymerase chain reaction (PCR) product. Within a panel of 22 sputum samples, INH resistance could be predicted in 5 of 10 samples containing isoniazid-resistant M. tuberculosis. The protocol is robust, requires little expertise and no specialized equipment, and provides the test results within 2 days. CONCLUSION The results show the feasibility to rapidly and easily detect mutations highly predictive of isoniazid resistance. Nevertheless, this, like any other molecular resistance prediction test, is affected by often neglected factors, including mutation prevalences, the phenomenon of heteroresistance, and a possible bias toward one's own method.
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Affiliation(s)
- H Rinder
- Department of Infectious Diseases and Tropical Medicine, Klinikum Innenstadt, University of Munich, Munich, Germany
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10
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Rinder H, Thomschke A, Rüsch-Gerdes S, Bretzel G, Feldmann K, Rifai M, Löscher T. Significance of ahpC Promoter Mutations for the Prediction of Isoniazid Resistance in Mycobacterium tuberculosis. Eur J Clin Microbiol Infect Dis 1998. [DOI: 10.1007/s100960050116] [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: 10/28/2022]
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Rinder H, Thomschke A, Rüsch-Gerdes S, Bretzel G, Feldmann K, Rifai M, Löscher T. Significance of ahpC promoter mutations for the prediction of isoniazid resistance in Mycobacterium tuberculosis. Eur J Clin Microbiol Infect Dis 1998; 17:508-11. [PMID: 9764555 DOI: 10.1007/bf01691135] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 11/26/2022]
Abstract
To determine the value of ahpC promoter mutations for the rapid prediction of isoniazid resistance, this genomic region was characterized in 50 isoniazid-resistant and 12 isoniazid-sensitive Mycobacterium tuberculosis isolates. Of the resistant isolates, 12 had ahpC promoter mutations, but only one possessed both an ahpC promoter mutation and a katG codon 315 substitution, although the latter was found in the majority (54%) of the isoniazid-resistant isolates investigated. This investigation presents empirical evidence that the central portion of the ahpC promoter is the most valuable genetic locus to complement katG codon 315 characterizations in order to increase the sensitivity of molecular tests for the prediction of isoniazid resistance.
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Affiliation(s)
- H Rinder
- Department of Infectious Diseases and Tropical Medicine, Klinikum Innenstadt, University of Munich, Germany
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12
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Dobner P, Rüsch-Gerdes S, Bretzel G, Feldmann K, Rifai M, Löscher T, Rinder H. Usefulness of Mycobacterium tuberculosis genomic mutations in the genes katG and inhA for the prediction of isoniazid resistance. Int J Tuberc Lung Dis 1997; 1:365-9. [PMID: 9432394] [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: 02/05/2023] Open
Abstract
SETTING Mutations in two genes of Mycobacterium tuberculosis, inhA and katG, are known to correlate with resistance to isoniazid (INH). OBJECTIVE To determine which mutation or mutations are the most predictive for INH resistance and the most frequent ones in such isolates. Further, to propose a simple and generally applicable method for their detection. DESIGN Codons 94 and 95 in the inhA gene and codons 315 and 463 in the katG gene were characterized in 50 INH-resistant and 12 INH-sensitive isolates from Germany and Sierra Leone. RESULTS Mutations in codon 315 of the katG gene were detected in 27 of the INH-resistant and none of the INH-sensitive isolates. All mutations in this codon altered an AciI restriction enzyme site. No mutations were found in the investigated codons of the inhA gene. CONCLUSION We propose that most INH resistances can be rapidly predicted by a simple AciI restriction enzyme digest of a polymerase chain reaction (PCR)-amplified katG fragment.
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Affiliation(s)
- P Dobner
- Department of Infectious Diseases and Tropical Medicine, University of Munich, Germany
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13
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Dobner P, Bretzel G, Rüsch-Gerdes S, Feldmann K, Rifai M, Löscher T, Rinder H. Geographic variation of the predictive values of genomic mutations associated with streptomycin resistance in Mycobacterium tuberculosis. Mol Cell Probes 1997; 11:123-6. [PMID: 9160326 DOI: 10.1006/mcpr.1996.0086] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [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: 02/04/2023]
Abstract
Specific mutations associated with resistance to streptomycin (SM) in Mycobacterium tuberculosis suggest themselves for its rapid prediction. However, as with any diagnostic test, their predictive values are dependent on their prevalences. In this report, SM resistance associated mutations in the rrs and rpsL genes of 25 SM resistant isolates from Germany and 25 SM resistant isolates from Sierra Leone were characterized and compared. Mutations in the rrs gene were infrequent in isolates from both localities (20% and 12%, respectively) and thus of limited predictive values. In contrast, rpsL mutations were found in 48% of the German isolates but only in 24% of the isolates from Sierra Leone. It is concluded that the predictive values of mutations in this gene may vary significantly with the origin of the samples under investigation.
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Affiliation(s)
- P Dobner
- Department of Infectious Diseases and Tropical Medicine, University of Munich, Germany
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14
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Radović N, Popović D, Rifai M, Mavrić I, Sefc J, Hrmić I. [Retroperitoneal marsupialization of renal cysts]. Lijec Vjesn 1997; 119:16-9. [PMID: 9213725] [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] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The use of minimal invasive surgery in urology continue to increase. Retroperitoneoscopic approach in performing minimal invasive surgery of retroperitoneum shortens the duration of operation in comparison with transabdominal approach, with minimal risk of intraabdominal complications. We described the use of the retroperitoneoscopic approach to the upper pole of a kidney for marsupialization of a symptomatic renal cyst. The procedure was minimally traumatic, morbidity was negligible and the patient was discharged from the hospital the third day after the operation. We believe that retroperitoneoscopic management of giant symptomatic renal cysts will be applicable, together with other existing methods.
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Affiliation(s)
- N Radović
- Djelatnost za kirurgiju, Opća bolnica Dr. Ivo Pedisića, Sisak
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15
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Abstract
Chemotaxonomic and 16S ribosomal DNA sequence analyses of an isolate from the sputum of a patient with a mycobacterial lung infection clearly delineated a new species of the genus Tsukamurella. This new species can be defined on the basis of genotypic and phenotypic data. The name Tsukamurella pulmonis sp. nov. is proposed for this organism; the type strain is IMMIB D-1321T (= DSM 44142T). This isolate shows 44.2 and 36.2% DNA relatedness to Tsukamurella paurometabola DSM 20162T (T = type strain) and Tsukamurella inchonensis DSM 44067T, respectively.
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Affiliation(s)
- A F Yassin
- Institut für Medizinische Mikrobiologie und Immunologie, Universität Bonn, Germany
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16
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Dobner P, Feldmann K, Rifai M, Löscher T, Rinder H. Rapid identification of mycobacterial species by PCR amplification of hypervariable 16S rRNA gene promoter region. J Clin Microbiol 1996; 34:866-9. [PMID: 8815098 PMCID: PMC228907 DOI: 10.1128/jcm.34.4.866-869.1996] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A total of 0.3 to 0.4 kb of the promoter region of the 16S rRNA genes from Mycobacterium tuberculosis, M. gordonae, M. xenopi, and M. leprae was PCR amplified, cloned, and sequenced. The observed number of substitutions, insertions, and deletions exceeded those found in previously used target sequences, including the entire 16S coding region. A simple and generally applicable restriction fragment length polymorphism method that can be used to distinguish between mycobacterial species is described.
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Affiliation(s)
- P Dobner
- Department for Infectious Diseases and Tropical Medicine, University of Munich, Germany
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17
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Ristow M, Möhlig M, Rifai M, Schatz H, Feldmann K, Pfeiffer A. New isoniazid/ethionamide resistance gene mutation and screening for multidrug-resistant Mycobacterium tuberculosis strains. Lancet 1995; 346:502-3. [PMID: 7637495 DOI: 10.1016/s0140-6736(95)91351-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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18
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Abstract
Twelve patients with bilateral fixed vocal cords seeking decannulation of their tracheostomies were subjected to endoscopic correction of the compromised airway. They all had arytenoidectomy associated with posterior cordectomy whether as a primary or secondary stage procedure. Decannulation was achieved in all patients using the technique described.
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19
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Abstract
Invasion of the skin of the neck by laryngeal carcinoma is relatively uncommon. Twelve cases of cancer of the larynx fungating through the cervical skin are presented. They mostly followed initial treatment by deep X-ray therapy or partial laryngectomy. A high tracheostomy was also considered to be a contributing cause for the occurrence of such a mishap. The management and follow-up of these patients is described.
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Affiliation(s)
- M Rifai
- E.N.T. Department, National Cancer Institute, Cairo University
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20
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Abstract
Isolated visual dysfunction with or without proptosis is rarely described as a sign of benign sphenoethmoidal lesions. Five patients with benign swelling of the sino-orbital region and related visual defects are reported. Cases include one patient with fibrous dysplasia, two patients with mucocoeles and two patients suffering from aspergillosis of the sinuses. A review of the literature and discussion of the cases is presented.
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Affiliation(s)
- M Rifai
- ENT Department, Cairo University
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21
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Abstract
Scleroma is an endemic disease in Egypt, which frequently results in subglottic laryngeal stenosis. Six patients suffering from laryngoscleroma are represented. They all underwent laryngotracheal resection of the stenosed segment, followed by direct anastomosis. The results were satisfactory in four of the patients. Surgery was abandoned in one patient who was believed to suffer from perichondritis following previous surgery. Restenosis occurred in a 14-year-old girl two weeks after surgery. This was attributed to recurrence, possibly due to residual activity of the disease which was missed before surgery.
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Abstract
The most common forms of surgical intervention carried out at the National Cancer Institute of Cairo for patients initially seen with hypopharyngeal carcinoma are (1) laryngopharyngectomy and pharyngeal repair using the pectoralis major myocutaneous flap (PMMF) and (2) extrapleural total pharyngolaryngoesophagectomy with gastric transposition (GT) and pharyngogastrostomy. The advantages and disadvantages with both techniques will be discussed on the basis of results of 69 patients with different tumor distributions over a 4-year period.
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Affiliation(s)
- M Rifai
- E.N.T. Department, National Cancer Institute, Cairo University, Egypt
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23
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Bricaire H, Strauch G, Rifai M, Cesselin F, Valcke JC. [Stimulation of growth hormone secretion with alpha-MSH]. Ann Endocrinol (Paris) 1974; 35:159-64. [PMID: 4422208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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