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Ramu SK, Oblizajek NR, Savica R, Chunawala ZS, Deb B, Bharucha AE. Defecatory disorders are a common cause of chronic constipation in Parkinson disease. Neurogastroenterol Motil 2024; 36:e14767. [PMID: 38376243 PMCID: PMC11061800 DOI: 10.1111/nmo.14767] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/30/2024] [Accepted: 02/05/2024] [Indexed: 02/21/2024]
Abstract
BACKGROUND AND AIMS Up to 50% of patients with Parkinson disease have constipation (PD-C), but the prevalence of defecatory disorders caused by rectoanal dyscoordination in PD-C is unknown. We aimed to compare anorectal function of patients with PD-C versus idiopathic chronic constipation (CC). METHODS Anorectal pressures, rectal sensation, and rectal balloon expulsion time (BET) were measured with high-resolution anorectal manometry (HR-ARM) in patients with PD-C and control patients with CC, matched for age and sex. RESULTS We identified 97 patients with PD-C and 173 control patients. Eighty-six patients with PD-C (89%) had early PD, and 39 (40%) had a defecatory disorder, manifest by a prolonged rectal balloon expulsion time (37 patients) or a lower rectoanal pressure difference during evacuation (2 patients). PD-C patients with a prolonged BET had a greater anal resting pressure (p = 0.02), a lower rectal pressure increment (p = 0.005), greater anal pressure (p = 0.047), and a lower rectoanal pressure difference during evacuation (p < 0.001). Rectal sensory thresholds were greater in patients with abnormal BET. In the multivariate model comparing CC and PD-C (AUROC = 0.76), PD-C was associated with a lower anal squeeze increment (odds ratio [OR] for PD-C, 0.93 [95% CI, 0.91-0.95]), longer squeeze duration (OR, 1.05 [95% CI, 1.03-1.08]), lower rectal pressure increment (OR per 10 mm Hg, 0.72 [95% CI, 0.66-0.79]), and negative rectoanal gradient during evacuation (OR per 10 mm Hg, 1.16 [95% CI, 1.08-1.26]). CONCLUSIONS Compared with CC, PD-C was characterized by impaired squeeze pressure, longer squeeze duration, lower increase in rectal pressure, and a more negative rectoanal gradient during evacuation.
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Affiliation(s)
| | - Nicholas R Oblizajek
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Rodolfo Savica
- Division of Movement Disorders, Mayo Clinic, Rochester, Minnesota, USA
| | - Zainali S Chunawala
- Research Fellow in the Enteric Neuroscience Program, Mayo Clinic, Rochester, Minnesota, USA
| | - Brototo Deb
- Research Fellow in the Enteric Neuroscience Program, Mayo Clinic, Rochester, Minnesota, USA
| | - Adil E Bharucha
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
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Agrawal A, Bajaj S, Bhagat U, Chandna S, Arockiam AD, Chan N, Haroun E, Gupta R, Badwan O, Shekhar S, Kathavarayan Ramu S, Nayar D, Jaber W, Griffin BP, Wang TKM. Intracardiac Thrombus in COVID-19 Inpatients: A Nationwide Study of Incidence, Predictors, and Outcomes. Angiology 2024:33197231225282. [PMID: 38173053 DOI: 10.1177/00033197231225282] [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] [Indexed: 01/05/2024]
Abstract
COronaVIrus Disease-2019 (COVID-19) is associated with a hypercoagulable state. Intracardiac thrombosis is a potentially serious complication but has seldom been evaluated in COVID-19 patients. We assessed the incidence, associated factors, and outcomes of COVID-19 patients with intracardiac thrombosis. In 2020, COVID-19 inpatients were identified from the National Inpatient Sample (NIS) database. Data on clinical characteristics, intracardiac thrombosis, and adverse outcomes were collected. Multivariable logistic regression was used to identify factors associated with intracardiac thrombosis, in-hospital mortality, and morbidities. In 2020, 1,683,785 COVID-19 inpatients (mean age 63.8 years, 32.2% females) were studied. Intracardiac thrombosis occurred in 0.10% (1830) of cases. In-hospital outcomes included 13.2% all-cause mortality, 3.5% cardiovascular mortality, 2.6% cardiac arrest, 4.4% acute coronary syndrome (ACS), 16.1% heart failure, 1.3% stroke, and 28.3% acute kidney injury (AKI). Key factors for intracardiac thrombosis were congestive heart failure history and coagulopathy. Intracardiac thrombosis independently linked to higher risks of all-cause mortality (odds ratio [OR]: 3.32 (2.42-4.54)), cardiovascular mortality (OR: 2.95 (1.96-4.44)), cardiac arrest (OR: 2.04 (1.22-3.43)), ACS (OR: 1.62 (1.17-2.22)), stroke (OR: 3.10 (2.11-4.56)), and AKI (OR: 2.13 (1.68-2.69)), but not heart failure. While rare, intracardiac thrombosis in COVID-19 patients independently raised in-hospital mortality and morbidity risks.
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Affiliation(s)
- Ankit Agrawal
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Suryansh Bajaj
- Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Umesh Bhagat
- Department of Hospital Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Sanya Chandna
- Department of Hospital Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Aro Daniela Arockiam
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Nicholas Chan
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Elio Haroun
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Rahul Gupta
- Lehigh Valley Heart Institute, Lehigh Valley Health Network, Allentown, PA, USA
| | - Osamah Badwan
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Shashank Shekhar
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Shivabalan Kathavarayan Ramu
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Divya Nayar
- Department of Neurology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Wael Jaber
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Brian P Griffin
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Tom Kai Ming Wang
- Department of Cardiovascular Medicine, Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA
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Kathavarayan Ramu S, Agrawal A, Shekhar S, Bansal A, Isogai T, Yun J, Reed GW, Puri R, Krishnaswamy A, Kapadia SR. MitraCox Score Predicts In-Hospital Mortality in Patients Admitted for Transcatheter Edge-to-Edge Mitral Valve Repair. Am J Cardiol 2023; 207:39-47. [PMID: 37722200 DOI: 10.1016/j.amjcard.2023.08.160] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 09/20/2023]
Abstract
As mitral valve transcatheter edge-to-edge repair (M-TEER) is evolving as an effective treatment for high-risk surgical patients with mitral regurgitation, there is a pressing need for cardiologists to optimize resources through risk stratification of in-hospital mortality for this patient population. Although current risk-prediction models have been shown to predict adverse outcomes with reasonable accuracy, models trained using the US nationwide population are lacking. This study aimed to identify clinical, demographic, and procedural features that predict in-hospital mortality, and to derive and validate an in-hospital mortality risk-prediction tool in patients who have undergone M-TEER. A total of 9,373 admissions from the Nationwide Readmissions Database of patients who underwent M-TEER between 2015 and 2018 were used to develop and validate the model. We first performed least absolute shrinkage and selection operator (LASSO) regularization of Cox regression (Coxnet) that is 10-fold cross-validated. The non-zero coefficients were multiplied with the respective values of each observation of the predictors to build the scoring formula. Out of 9,373 admissions, 196 patients (2%) died in-hospital during index admission. In descending order, the top variables that were most predictive of in-hospital mortality were higher age, presence of fluid and electrolyte disturbance, and large metropolitan location of the hospital. The validation C-statistic of the MitraCox score was 0.82. Using X-tile software (Yale School of Medicine, New Haven, Connecticut), 2 cutoffs of the score were determined on the basis of in-hospital mortality and length of stay, and the survival of the population was classified into 3 risk groups: low, intermediate, and high. The scoring system deployed online as a web-based calculator can be accessed at https://kathavs.shinyapps.io/Mitracox_Kapadia/. In conclusion, MitraCox score is easy to calculate and predicts in-hospital mortality depending on length of stay in a dynamic manner.
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Affiliation(s)
| | - Ankit Agrawal
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Shashank Shekhar
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Agam Bansal
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Toshiaki Isogai
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - James Yun
- Department of Thoracic and Cardiovascular Surgery, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Grant W Reed
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Rishi Puri
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Amar Krishnaswamy
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Samir R Kapadia
- Department of Cardiovascular Medicine, Heart, Vascular & Thoracic Institute, Cleveland Clinic, Cleveland, Ohio.
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Agrawal A, Ramu SK, Shekhar S, Isogai T, Bansal A, Yun J, Reed GW, Puri R, Krishnaswamy A, Kapadia SR. Impact of Noncardiac Co-Morbidities in Patients Who Underwent Transcatheter Edge-to-Edge Mitral Valve Repair on Outcomes. Am J Cardiol 2023; 204:401-404. [PMID: 37595506 DOI: 10.1016/j.amjcard.2023.07.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 07/13/2023] [Indexed: 08/20/2023]
Affiliation(s)
- Ankit Agrawal
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Shivabalan Kathavarayan Ramu
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Shashank Shekhar
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Toshiaki Isogai
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Agam Bansal
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - James Yun
- Department of Thoracic and Cardiovascular Surgery, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Grant W Reed
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Rishi Puri
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Amar Krishnaswamy
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Samir R Kapadia
- Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio.
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Shekhar S, Kaw R, Ramu SK, Pampori A, Isogai T, Krishnaswamy A, Puri R, Reed G, Harb SC, Yun J, Kapadia SR. Outcomes After Isolated Aortic Valve Replacements in Patients With Chronic Obstructive Pulmonary Disease. Am J Cardiol 2023; 200:72-74. [PMID: 37302283 DOI: 10.1016/j.amjcard.2023.04.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/16/2023] [Accepted: 04/30/2023] [Indexed: 06/13/2023]
Affiliation(s)
| | - Roop Kaw
- Departments of Hospital Medicine; Departments of Anesthesiology Outcomes Research
| | | | | | | | | | | | | | | | - James Yun
- Thoracic and Cardiovascular Surgery, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio
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Xiao AH, Kathavarayan Ramu S, Gautam M, Bharucha AE. Defecatory disorders in patients with type 1 diabetes and chronic constipation. Neurogastroenterol Motil 2023:e14599. [PMID: 37052404 DOI: 10.1111/nmo.14599] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 03/07/2023] [Accepted: 03/29/2023] [Indexed: 04/14/2023]
Abstract
BACKGROUND AND OBJECTIVES Chronic constipation (CC) may be caused by defecatory disorders (DDs) and associated with reduced rectal sensation. Among patients with type 1 diabetes (T1D) and CC (T1DCC patients), the prevalence of DDs and reduced rectal sensation is unknown. We sought to compare complications of T1D, anorectal dysfunction, and CC symptoms, among T1DCC patients with versus without a DD. METHODS Anorectal pressures at rest and during squeeze and evacuation, as well as rectal sensation and rectal balloon expulsion time (BET) were measured with high-resolution anorectal manometry in 114 consecutive T1DCC patients. RESULTS Thirty-seven patients (32%) had prolonged BET, suggestive of a DD. Complications of T1D included peripheral neuropathy (n = 67, 59%), retinopathy (n = 42, 37%), and nephropathy (n = 26, 23%). Among these complications, only retinopathy was associated with, that is, more prevalent in patients with normal (45%) than prolonged BET (19%). Compared with patients with normal BET, patients with prolonged BET had a lower rectal pressure (mean [SD], 32 [23] mm Hg vs. 23 [19] mm Hg, p = 0.03), greater anal pressure (91 [23] mm Hg vs. 68 [36] mm Hg, p < 0.001), and lower rectoanal gradient (-67 [30] mm Hg vs. -36 [32] mm Hg, p < 0.0001) during evacuation. Anal resting pressure and anal squeeze increment were below normal in 14 (13%) and 32 (29%) of patients and one or more rectal sensory thresholds were above normal in 34 (30%) patients; these abnormalities affected similar proportions in the normal and prolonged BET cohorts. CONCLUSIONS Among T1DCC patients, 37 (32%) had prolonged BET, which was associated with anorectal pressures indicative of a DD but was not associated with reduced rectal sensation, suggesting that DDs are more likely explained by abdomino-anal dyscoordination than visceral disturbance.
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Affiliation(s)
- Alexander H Xiao
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, United States
| | | | - Misha Gautam
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, United States
| | - Adil E Bharucha
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States
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7
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Ramu SK, Byale A, Acharya DN, Gautam M, Gupta K. COMPARISON OF CARDIAC MANIFESTATIONS OF HEREDITARY AND SECONDARY HEMOCHROMATOSIS AND EFFECT OF ASPIRIN ON MORTALITY: AN ANALYSIS OF NATIONAL INPATIENT SAMPLE DATABASE 2016-19. J Am Coll Cardiol 2023. [DOI: 10.1016/s0735-1097(23)01029-x] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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8
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Blackett JW, Gautam M, Mishra R, Oblizajek NR, Kathavarayan Ramu S, Bailey KR, Bharucha AE. Comparison of Anorectal Manometry, Rectal Balloon Expulsion Test, and Defecography for Diagnosing Defecatory Disorders. Gastroenterology 2022; 163:1582-1592.e2. [PMID: 35995074 PMCID: PMC9691522 DOI: 10.1053/j.gastro.2022.08.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/10/2022] [Accepted: 08/13/2022] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS The utility of high-resolution anorectal manometry (HR-ARM) for diagnosing defecatory disorders (DDs) is unclear because healthy people may have features of dyssynergia. We aimed to identify objective diagnostic criteria for DD and to ascertain the utility of HR-ARM for diagnosing DD. METHODS Constipated patients were assessed with HR-ARM and rectal balloon expulsion time (BET), and a subset underwent defecography. Normal values were established by assessing 184 sex-matched healthy individuals. Logistic regression models evaluated the association of abnormal HR-ARM findings with prolonged BET and reduced rectal evacuation (determined by defecography). RESULTS A total of 474 constipated individuals (420 women) underwent HR-ARM and BET, and 158 underwent defecography. BET was prolonged, suggesting a DD, for 152 patients (32%). Rectal evacuation was lower for patients with prolonged vs normal BET. A lower rectoanal gradient during evacuation, reduced anal squeeze increment, and reduced rectal sensation were independently associated with abnormal BETs; the rectoanal gradient was 36% sensitive and 85% specific for prolonged BET. A lower rectoanal gradient and prolonged BET were independently associated with reduced evacuation. Among constipated patients, the probability of reduced rectal evacuation was 14% when the gradient and BET were both normal, 45% when either was abnormal, and 75% when both variables were abnormal. CONCLUSIONS HR-ARM, BET, and defecography findings were concordant for constipated patients, and reduced rectoanal gradient was the best HR-ARM predictor of prolonged BET or reduced rectal evacuation. Prolonged BET, reduced gradient, and reduced evacuation each independently supported a diagnosis of DD in constipated patients. We propose the terms probable DD for patients with an isolated abnormal gradient or BET and definite DD for patients with abnormal results from both tests.
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Affiliation(s)
- John W Blackett
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Misha Gautam
- Enteric Physiology and Imaging Facility, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Rahul Mishra
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Nicholas R Oblizajek
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Shivabalan Kathavarayan Ramu
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Kent R Bailey
- Division of Clinical Trials and Biostatistics, Mayo Clinic, Rochester, Minnesota
| | - Adil E Bharucha
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota.
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Ramu SK, Yadav K. Study of Diversity of Metformin Related Gastrointestinal Side Effects. J Assoc Physicians India 2022; 70:11-12. [PMID: 35833410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
| | - Kiran Yadav
- Junior Resident, Mahatma Gandhi Medical College and Research Institute, Puducherry, Puducherry, India
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Ramachandran A, Kathavarayan Ramu S. Neural Network Pattern Recognition of Ultrasound Image Gray Scale Intensity Histograms of Breast Lesions to Differentiate Between Benign and Malignant Lesions: Analytical Study. JMIR Biomed Eng 2021. [DOI: 10.2196/23808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background
Ultrasound-based radiomic features to differentiate between benign and malignant breast lesions with the help of machine learning is currently being researched. The mean echogenicity ratio has been used for the diagnosis of malignant breast lesions. However, gray scale intensity histogram values as a single radiomic feature for the detection of malignant breast lesions using machine learning algorithms have not been explored yet.
Objective
This study aims to assess the utility of a simple convolutional neural network in classifying benign and malignant breast lesions using gray scale intensity values of the lesion.
Methods
An open-access online data set of 200 ultrasonogram breast lesions were collected, and regions of interest were drawn over the lesions. The gray scale intensity values of the lesions were extracted. An input file containing the values and an output file consisting of the breast lesions’ diagnoses were created. The convolutional neural network was trained using the files and tested on the whole data set.
Results
The trained convolutional neural network had an accuracy of 94.5% and a precision of 94%. The sensitivity and specificity were 94.9% and 94.1%, respectively.
Conclusions
Simple neural networks, which are cheap and easy to use, can be applied to diagnose malignant breast lesions with gray scale intensity values obtained from ultrasonogram images in low-resource settings with minimal personnel.
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Fazal F, Gupta N, Ramu SK, Nayan A, Vikram NK, Ray A. Haemophagocytic lymphohistiocytosis in patients with human immunodeficiency virus infection: to treat or not to treat. Pan Afr Med J 2019; 32:105. [PMID: 31223395 PMCID: PMC6560963 DOI: 10.11604/pamj.2019.32.105.14764] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 12/28/2018] [Indexed: 11/11/2022] Open
Abstract
Haemophagocytic lymphohistiocytosis (HLH) in Human Immunodeficiency Virus (HIV) infected individuals can either be due to the disease itself or due to associated infections/malignancies. The treatment for HLH requires immunosuppressive therapy but administering immunosuppressive therapy to an already immunosuppressed patient (HIV infection) is complex. We present two such cases of HLH in patients infected with HIV. In the first case, no alternate cause for HLH was found even after extensive investigations and it was attributed to the uncontrolled HIV replication. Patient was started on dexamethasone for the same but succumbed to hospital acquired pneumonia. The second patient was diagnosed with Hodgkin's lymphoma but he succumbed to his illness before initiating immunosuppressive therapy for HLH. We report these cases to highlight the dilemma and a need for further research in this direction.
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Affiliation(s)
- Farhan Fazal
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Nitin Gupta
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | | | - Aditya Nayan
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Naval Kishore Vikram
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Animesh Ray
- Department of Medicine, All India Institute of Medical Sciences, New Delhi, India
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