Dr Niroshan Muwanwella MBBS FRACP
Interventional Gastroenterologist, Royal Perth Hospital, PhD Candidate, Curtin University
Dr Niroshan Muwanwella (MBBS, FRACP) is an Interventional Gastroenterologist based at Royal Perth Hospital and Hollywood Private Hospital in Western Australia. He completed his gastroenterology training in Perth before undertaking advanced interventional fellowships at Sir Charles Gairdner Hospital and St. Michael’s Hospital, University of Toronto—centres renowned for pioneering therapeutic endoscopy.
Dr Muwanwella’s expertise spans the full spectrum of advanced endoscopic interventions, with a particular focus on endoscopic submucosal dissection (ESD) and third-space endoscopy. His procedural repertoire includes per-oral endoscopic myotomy (POEM) for achalasia, cricopharyngeal POEM (C-POEM) for upper oesophageal motility disorders, Zenker’s POEM (Z-POEM) for pharyngeal pouches, and gastric POEM (G-POEM) for gastroparesis. He also performs endoscopic intermuscular dissection for early rectal malignancy, Barrett’s endotherapy with EMR and radiofrequency ablation, and ERCP with cholangioscopy for complex biliary disease.
An active clinician-scientist, Dr Muwanwella is currently pursuing a PhD at Curtin University investigating the optimisation of third-space endoscopy in upper gastrointestinal motility disorders. His research aims to define procedural metrics, refine training paradigms, and improve outcomes for patients undergoing advanced therapeutic endoscopy.
Dr Muwanwella has published extensively in high-impact journals such as Digestive Endoscopy, Surgical Endoscopy, and JGH Open, contributing to the evolving literature on minimally invasive GI techniques. He is also a regular presenter at national and international meetings, including the World Congress of Gastroenterology (AGW) and the ISDE World Congress for Esophageal Diseases.
With a commitment to innovation, education, and patient-centred care, Dr Muwanwella is dedicated to advancing organ-preserving, surgery-sparing endoscopic therapies and training the next generation of endoscopists in these transformative techniques.
Dr Niroshan Muwanwella is the director of Riverview Endoscopy.
Publications
Muwanwella N, Haidry R, Ragunath K. Quality Management of Barrett’s Esophagus. Gastrointestinal Endoscopy Clinics of North America (article in press) DOI: 10.1016/j.giec.2025.08.001
Muwanwella N, Ragunath K. The Promise and Challenges of CAD-Assisted Diagnosis in Achalasia. Dig Endosc. Jun 25 2025;doi:10.1111/den.15076
Judge C, Chin M, Muwanwella N. Star-loop: A novel, low-cost method of multipoint traction for colonic
endoscopic submucosal dissection. VideoGIE 2024; 9: 494-6.
Judge C, Halder A, Pateria P, Khor T, Muwanwella N, Chin M, Ragunath K. Outcomes and validity of risk stratification tools for endoscopic submucosal dissection of early gastric cancer in Western Australia. JGH Open. 2024 Nov 15;8(11):e70034. doi: 10.1002/jgh3.70034. PMID: 39554984; PMCID: PMC11567118.
Muwanwella N. Snare-assisted clipping method for closure of mucosal incision of gastric peroral endoscopic myotomy. Dig Endosc. 2024 Dec;36(12):1388. doi: 10.1111/den.14930. Epub 2024 Sep 26. PMID: 39325009.
Judge, C., Chin, M., & Muwanwella, N. Star-Loop: a novel, low-cost method of multipoint traction for colonic endoscopic submucosal dissection. VideoGIE. 2024 Jul 4;9(11):494-496. doi: 10.1016/j.vgie.2024.06.012. PMID: 39534565; PMCID: PMC11551485
Mithanthaya A, Ismail AGM, Muwanwella N, Venugopal K. Blue rubber bleb nevus syndrome in a patient on anticoagulation: A management dilemma. BMJ Case Rep 2023; 16.
Shimamura Y, Iwaya Y, Kobayashi R, Rodriguez de Santiago E, Muwanwella N, Raftopoulos S, Mosko JD, May GR, Kandel G, Kortan P, Marcon N, Teshima CW. Clinical and pathological predictors of failure ofendoscopic therapy for Barrett's related high-grade dysplasia and early esophageal adenocarcinoma. Surg Endosc. 2021 Oct;35(10):5468-5479. doi: 10.1007/s00464-020-08037-x. Epub 2020 Sep 28. PMID: 32989547.
Pateria P, Chong A, Muwanwella N, Siah C, Kumarasinghe P, Raftopoulos S. To Investigate Outcomes In Endoscopic Management Of Early Oesophageal Adenocarcinoma In Barrett's Oesophagus: Experience At Three Australian Tertiary Centres. Intern Med J. 2022 Apr;52(4):633-639. doi: 10.1111/imj.15104. PMID: 33073906.
Muwanwella N, Shimamura Y, Akram H, Kortan P, Marcon N. Endoscopic diagnosis of gastric anisakiasis and extraction of larvae. Gastrointest Endosc. 2016 Sep;84(3):528. doi: 10.1016/j.gie.2016.03.1504. Epub 2016 Apr 7. PMID: 27063917.
Muwanwella N, Shimamura Y, Marcon N. A Rare Cause of Acute Abdomen. Clin Gastroenterol Hepatol. 2016 Jul;14(7):A35-6. doi: 10.1016/j.cgh.2016.02.028. Epub 2016 Mar 7. PMID: 26965844.
Shimamura Y, Muwanwella N, Chandran S, Kandel G, Marcon N. Common Symptoms from an Uncommon Infection: Gastrointestinal Anisakiasis. Can J Gastroenterol Hepatol. 2016;2016:5176502. doi: 10.1155/2016/5176502. Epub 2016 Oct 9. PMID: 27800471; PMCID: PMC5075291.