Neil Sharma

Neil Sharma

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

The organizations/institutes from the scholar's latest article


Neil Sharma has a total of 117 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Endoscopic Ultrasound-Guided Gallbladder Drainage

    by Andrew Canakis, Todd H. Baron, Shifa Umar, Gregory Lam, Rahul Pannala, Stuart Amateau, Thomas Tielleman, Dmitriy O. Khodorskiy, Rafael Ching Companioni, Gurneet Bedi, et al.

    Acute cholecystitis affects ∼200,000 individuals annually in the United States, with laparoscopic cholecystectomy as the gold standard treatment. However, in high-risk surgical candidates, alternative drainage methods are necessary. Percutaneous transhepatic gallbladder drainage (PT-GBD) has traditionally served as the primary alternative intervention, offering rapid decompression, but is limited by a negative impact on the patient’s quality of life, the risk of long-term or even permanent tube placement, adverse events, and high recurrence rates. Endoscopic approaches, such as endoscopic transpapillary gallbladder drainage (ET-GBD) and, more recently, endoscopic ultrasound-guided gallbladder drainage (EUS-GBD), have emerged as viable alternatives to PT-GBD. EUS-GBD, first introduced in 2007, offers technical and clinical outcomes comparable to PT-GBD with fewer adverse events, shorter hospital stays, and lower rates of recurrence. The introduction of lumen-apposing metal stents (LAMS) has revolutionized EUS-GBD, simplifying deployment and enabling subsequent internal gallbladder access, which allows additional interventions such as cholecystoscopy and stone removal. EUS-GBD is now supported by international guidelines, and 1 device has achieved FDA approval for the management of acute cholecystitis in nonsurgical candidates. Proper patient selection is essential, guided by multidisciplinary evaluation, with EUS-GBD contraindicated in specific scenarios such as gallbladder perforation, coagulopathy, and large-volume ascites. Technical considerations include choice of access site (transgastric versus transduodenal), stent type, and procedural route [direct (freehand) or wire-guided]. Postprocedural care and stent management remain variable and nonstandardized. Emerging data suggest that interval cholecystectomy can still be performed safely after EUS-GBD. As adoption of EUS-GBD with LAMS expands, structured training and standardization of practice are crucial to optimizing outcomes.


  • Prospective cohort study of palliative treatment of esophageal cancer with liquid nitrogen spray cryotherapy

    by Cary C. Cotton, Swathi Eluri, Vivek Kaul, Neil R. Sharma, Stuart R. Gordon, Toufic Kachaamy, George Smallfield, Jason Samarasena, Arvind Trindade, Field F. Willingham, et al.

  • Open Access

    Spray Cryotherapy Esophageal Consortium Consensus Recommendations for Liquid Nitrogen Spray Cryotherapy in Barrett's Esophagus and Esophageal Cancer Using a Modified Delphi Process

    by Tilak Shah, Zaid Ansari, Akram Ahmad, Walter Coyle, Bruce B. Greenwald, Toufic Kachaamy, Shivangi Kothari, Neil Sharma, George Smallfield, Shyam Thakkar, et al.

    INTRODUCTION: The study aimed to develop consensus recommendations for the safe and appropriate use of liquid nitrogen spray cryotherapy in Barrett's esophagus and esophageal cancer. METHODS: Statements were initially formulated and grouped into categories of indications, training, preprocedure, intraprocedure, and postprocedure recommendations, frequency/timing of repeat procedures, and contraindications. Two investigators assessed the strength of the evidence for each statement using Grading of Recommendations Assessment, Development, and Evaluation methodology. Nineteen experts were invited to participate in a modified Delphi process. For statements that received >80% agreement, minor iterative edits were performed until there was unanimous consensus. If a threshold of 80% agreement was not reached, the statement was modified based on feedback and included in the next Delphi round. Statements were rejected if no consensus was reached after 3 rounds. RESULTS: After 3 Delphi rounds, 41 of 42 statements were accepted either in their original version (n = 11) or after modification based on expert input (n = 30). DISCUSSION: Through a modified Delphi process, we developed expert and evidence-based consensus recommendations to guide safe and appropriate use of liquid nitrogen spray cryotherapy in Barrett's esophagus and esophageal cancer.


  • Gastrointestinal Subepithelial Lesions: Evolution in Management and Endoscopic Resection Techniques

    by Ahmad Abulawi, Stephen Hasak, Ricardo Marrero Torres, Harishankar Gopakumar, Seth Richter, Dushyant Singh Dahiya, Raya Alashram, Talia F. Malik, Aqsa Khan, Neil R. Sharma

    Purpose of Review Subepithelial lesions (SELs) are tumors originating from the gastrointestinal (GI) tract wall (muscularis mucosa, submucosa, or muscularis propria) and are covered by overlying mucosa. They are typically incidental findings during routine endoscopy. This article reviews the latest advancements in endoscopic techniques and devices used to resect subepithelial lesions. Recent Findings Endoscopic Ultrasound (EUS) should be employed to characterize SELs, with fine needle core biopsy (FNB) utilized with EUS for histopathologic tissue acquisition. EUS can be used as “endoscopic mapping” to mitigate serious complications prior to endoscopic resection. Techniques such as Submucosal Tunnelling Endoscopic Resection (STER), Device-Assisted Endoscopic Full Thickness Resection, and Freehand Full Thickness Resection are available for the complete resection of SELs. The choice of technique depends on the characteristics of the lesion and the level of expertise of the endoscopist. Summary Multiple endoscopic resection techniques for SELs have been developed, each utilizing different tools and devices. A significant shift has occurred from traditional laparoscopic surgical resection to minimally invasive, organ-sparing endoscopic resection. Advancements in “third space” endoscopy and the innovation of novel devices continue to offer less invasive resection techniques for lesions arising from the GI tract wall.


  • Open Access

    Impact of Artificial Intelligence on Pancreaticobiliary Endoscopy

    by Aryan Jain, Mayur Pabba, Aditya Jain, Sahib Singh, Hassam Ali, Rakesh Vinayek, Ganesh Aswath, Neil Sharma, Sumant Inamdar, Antonio Facciorusso

    Pancreaticobiliary diseases can lead to significant morbidity and their diagnoses rely on imaging and endoscopy which are dependent on operator expertise. Artificial intelligence (AI) has seen a rapid uptake in the field of luminal endoscopy, such as polyp detection during colonoscopy. However, its use for pancreaticobiliary endoscopic modalities such as endoscopic ultrasound (EUS) and cholangioscopy remains scarce, with only few studies available. In this review, we delve into the current evidence, benefits, limitations, and future scope of AI technologies in pancreaticobiliary endoscopy.


  • Open Access

    Endoscopic Ultrasound-Guided Treatments for Pancreatic Cancer: Understanding How Endoscopic Ultrasound Has Revolutionized Management of Pancreatic Cancer

    by Sahib Singh, Antonio Facciorusso, Rakesh Vinayek, Sudhir Dutta, Dushyant Singh Dahiya, Ganesh Aswath, Neil Sharma, Sumant Inamdar

    Pancreatic cancer is associated with high rates of morbidity and mortality. Endoscopic ultrasound (EUS)-guided biopsy has become the standard diagnostic modality per the guidelines. The use of EUS has been growing for providing various treatments in patients with pancreatic cancers: biliary and gallbladder drainage for those with malignant biliary obstruction, gastroenterostomy for malignant gastric outlet obstruction, celiac plexus/ganglia neurolysis for pain control, radiofrequency ablation, placement of fiducial markers, and injection of local chemotherapeutic agents. In this review, we explore the recent clinical studies evaluating the EUS-guided treatments in pancreatic cancer.


  • Open Access

    Racial Disparities in Inpatient Hospital Outcomes of Primary Sclerosing Cholangitis in United States: Nationwide Analysis

    by Ishaan Vohra, Harishankar Gopakumar, Dushyant Singh Dahiya, Michel Kahaleh, Neil Sharma

    Background: Primary sclerosing cholangitis (PSC) is an idiopathic cholestatic liver disease that may lead to biliary strictures and destruction. It is associated with p-ANCA positivity and inflammatory bowel disease, typically ulcerative colitis. The aim of this study is to investigate the trends of inpatient healthcare utilization and mortality from 2008 to 2017 in the United States. Methods: The Nationwide Inpatient Sample (NIS) was examined to identify adult patients diagnosed with PSC between 2008 and 2017. Data on patient demographics, resource utilization, mortality, and PSC-related complications were collected. STATA version 16.0 was employed to perform forward stepwise multivariate regression analysis, generating adjusted odds ratios for both primary and secondary outcomes. Primary outcomes included the inpatient mortality rate and healthcare resource utilization (length of stay, total charges, and trends over the study period). Secondary outcomes focused on trends in associated comorbidities and malignancies in patients with PSC. Results: The average total charge increased by 32.2% ± 2.12 from USD 61,873 ± 2567 in 2008 to USD 91,262 ± 2961 in 2017. Concurrently, the average length of stay declined from 8.07 ± 0.18 days in 2008 to 7.27 ± 0.13 days in 2017. The APR-DRG severity of illness and risk of death significantly increased (major or extreme) during the study period (2008 to 2017), with severity rising from 73.6% to 82.7% (coefficient: 0.21, 95% CI: 0.13–0.28) and risk of death from 45.3% to 60.9% (coefficient: 0.15, 95% CI: 0.08–0.23). The proportion of patients with HCC increased from 1.3% to 7.9% (coefficient: 2.13, 95% CI: 1.9–2.8). Conversely, the percentage of patients with cholangiocarcinoma (CCA) decreased from 5.1% to 2.8% (coefficient: −0.36, 95% CI: −0.25 to −0.46). Conclusions: There was rising mortality and healthcare resource utilization among patients with PSC from the years 2008 to 2017. These trends were paralleled by increasing rates of decompensated cirrhosis, HCC, and liver transplants. However, the incidence of CCA decreased during this time period. African American patients with PSC had worse inpatient mortality outcomes and healthcare utilization as compared to white patients. Further studies are warranted to investigate a possible causal link amongst these trends.

  • Open Access

    Impact of Frailty on Early Readmissions of Endoscopic Retrograde Cholangiopancreatography in the United States: Where Do We Stand?

    by Bhanu Siva Mohan Pinnam, Dushyant Singh Dahiya, Saurabh Chandan, Manesh Kumar Gangwani, Hassam Ali, Sahib Singh, Umar Hayat, Amna Iqbal, Saqr Alsakarneh, Fouad Jaber, et al.

    Background/Objectives: We assessed the impact of frailty on outcomes of endoscopic retrograde cholangiopancreatography (ERCP) in the United States. Methods: The National Readmission Database (2016–2020) was used to identify index and 30-day ERCP readmissions, which were categorized into low-frailty, intermediate-frailty, and high-frailty groups based on the Hospital Frailty Risk Score (HFRS). Outcomes were then compared. Results: Of 885,416 index admissions, 9.9% were readmitted within 30 days of ERCP. The odds of 30-day readmission were higher in the intermediate-frailty group (12.59% vs. 8.2%, odds ratio [OR] 1.67, 95% confidence interval [CI] 1.64–1.71, p < 0.001) and the high-frailty group (10.57% vs. 8.2%, OR 1.62, 95% CI 1.52–1.73, p < 0.001) compared to the low-frailty group. On readmission, a higher HFRS also increased mean length of stay (intermediate-frailty vs. low-frailty: 8.49 vs. 4.22 days, mean difference (MD) 4.26, 95% CI 4.19–4.34, p < 0.001; high-frailty vs. low-frailty: 10.9 vs. 4.22 days, MD 10.9 days, 95% CI 10.52–11.28, p < 0.001) and mean total hospitalization charges (intermediate-frailty vs. low-frailty: $118,996 vs. $68,034, MD $50,962, 95% CI 48, 854–53,069, p < 0.001; high-frailty vs. low-frailty: $195,584 vs. $68,034, MD $127,550, 95% CI 120,581–134,519, p < 0.001). The odds of inpatient mortality were also higher for the intermediate-frailty and high-frailty compared to the low-frailty subgroup. Conclusions: Frailty was associated with worse clinical outcomes after ERCP.


  • Indirect comparison of various lumen-apposing metal stents for EUS-guided biliary and gallbladder drainage: a systematic review and meta-analysis

    by Sahib Singh, Vishnu Charan Suresh Kumar, Ganesh Aswath, Hafiz Muzaffar Akbar Khan, Bishnu Sapkota, Rakesh Vinayek, Sudhir Dutta, Dushyant Singh Dahiya, Sumant Inamdar, Babu P. Mohan, et al.


  • Open Access

    Early and Late Readmissions of Radiation Proctitis in the United States: Are We Getting Better?

    by Dushyant Singh Dahiya, Bhanu Siva Mohan Pinnam, Michelle Ishaya, Saurabh Chandan, Manesh Kumar Gangwani, Sahib Singh, Hassam Ali, Amir Humza Sohail, Andrew Canakis, Daryl Ramai, et al.

    Background/Aims: Radiation proctitis (RP), a well-known complication of pelvic radiation therapy, may lead to recurrent hospitalizations. We aimed to assess readmissions of RP in the United States. Methods: We analyzed the Nationwide Readmission Database from 2016 to 2020 to identify all 30-, 60-, and 90-day readmissions of RP in the United States. Hospitalization characteristics, predictors, clinical outcomes, and healthcare burdens were assessed. Results: From 2016 to 2020, we noted a declining trend of 30-, 60-, and 90-day readmissions of RP in the US. However, the all-cause 30-, 60-, and 90-day readmission rates of RP were still high at 13.7%, 19.4%, and 23.16%, respectively. On readmission, RP was identified as the admitting diagnosis in only 20.61%, 17.87%, and 15.76% of 30-, 60-, and 90-day readmissions, respectively. The mean age for all readmissions was 70 years with a significant male dominance. Lower endoscopy at index admission reduced the risk of readmissions within 90 days, but this was not statistically significant. However, the Charlson Comorbidity Index (CCI) score was an independent predictor of all readmissions. Furthermore, the mean length of stay was 5.57 (95% CI 5.15–6), 5.50 (95% CI 5.12–5.89), and 5.47 (95% CI 5.07–5.87) days and the mean hospitalization charge was USD 60,451 (95% CI USD 54,728–66,174), USD 62,671 (95% CI USD 57,326–68,015), and USD 62,144 (95% CI USD 57,144–67,144) for 30-, 60-, and 90-day readmissions. The all-cause inpatient mortality for 30-, 60-, and 90-day readmissions was 3.58%, 3.89%, and 3.46%, respectively. Conclusions: RP readmissions are a significant healthcare burden. Further efforts must be directed toward improving management strategies to reduce readmission rates.