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Associate Professor Stuart Kostalas

Associate Professor Stuart Kostalas

Conjoint Associate Professor

MB(Hons1), MM(Clin Epi), MSc(Oxon), MBiostatistics, GStat, FRACP

Medicine & Health
School of Clinical Medicine

Prof Kostalas is a consultant gastroenterologist and hepatologist with subspecialty expertise in interventional endoscopy. He has resided in Port Macquarie since 2013. He holds a conjoint professorial appointment at the University of NSW and is completing his DPhil at the University of Oxford, where he is researching serrated polyps and serrated polyposis syndrome. He founded the Port Macquarie Gastroenterology Research Group in 2023 and established the annual Port Macquarie ESD Course in collaboration with Japanese expert endoscopists.
Location
Port Macquarie Gastroenterology 22/15 Chancellors Drive, Thrumster NSW 2444
  • Journal articles | 2026
    Dierick N; Lee C; Kostalas SN, 2026, 'Benchmarking sessile serrated lesion detection in colonoscopy: individual endoscopist performance has greater impact than specialty training - a retrospective analysis of 12,064 procedures', BMC Gastroenterology, 26, http://dx.doi.org/10.1186/s12876-025-04523-5
    Journal articles | 2025
    Dierick N; Kostalas S, 2025, 'Many Years of Severe Recurrent Abdominal Pain', Gastro Hep Advances, 4, http://dx.doi.org/10.1016/j.gastha.2025.100682
    Journal articles | 2025
    Lee C; Awad N; Kostalas S, 2025, 'Metastatic Urothelial Carcinoma Presenting as Rectal Linitis Plastica: A Rare Case Report', Gastro Hep Advances, 4, http://dx.doi.org/10.1016/j.gastha.2025.100707
    Journal articles | 2025
    Thompson A; Dierick NR; Heiniger L; Kostalas SN, 2025, 'Health anxiety and work loss in patients diagnosed with serrated polyposis syndrome: A cross sectional study', WORLD JOURNAL OF CLINICAL ONCOLOGY, 16, http://dx.doi.org/10.5306/wjco.v16.i2.97107
    Journal articles | 2025
    Williams H; Dierick NR; Lee C; Sundaralingam P; Kostalas SN, 2025, 'Determinants of high sessile serrated lesion detection: Role of faecal occult blood test and colonoscopy quality indicators', WORLD JOURNAL OF GASTROINTESTINAL ENDOSCOPY, 17, http://dx.doi.org/10.4253/wjge.v17.i8.109176
    Journal articles | 2025
    Wu MY; Martin O; Sundaralingam P; Kostalas S, 2025, 'Endoscopic freehand full-thickness resection of a gastric leiomyosarcoma initially diagnosed as gastric leiomyoma on endoscopic ultrasound—guided fine-needle biopsy', Videogie, 10, pp. 631 - 635, http://dx.doi.org/10.1016/j.vgie.2025.07.008
    Journal articles | 2024
    Dierick NR; Nicholson BD; Fanshawe TR; Sundaralingam P; Kostalas SN, 2024, 'Serrated polyposis syndrome: defining the epidemiology and predicting the risk of dysplasia', BMC Gastroenterology, 24, http://dx.doi.org/10.1186/s12876-024-03247-2
    Journal articles | 2022
    Ikezawa N; Toyonaga T; Tanaka S; Yoshizaki T; Takao T; Abe H; Sakaguchi H; Tsuda K; Urakami S; Nakai T; Harada T; Miura K; Yamasaki T; Kostalas S; Morita Y; Kodama Y, 2022, 'Feasibility and safety of endoscopic submucosal dissection for lesions in proximity to a colonic diverticulum', Clinical Endoscopy, 55, pp. 417 - 425, http://dx.doi.org/10.5946/ce.2021.245
    Journal articles | 2021
    Zhang LY; Tikhe D; Ermerak GG; Lee H; Letisia Sin HC; Hourigan LF; Kostalas S; Bassan MS, 2021, 'ID: 3522357 FULLY COVERED METAL BILIARY STENTS ARE ASSOCIATED WITH INCREASED RATES OF POST-ERCP PANCREATITIS', Gastrointestinal Endoscopy, 93, pp. AB152 - AB152, http://dx.doi.org/10.1016/j.gie.2021.03.309
    Journal articles | 2019
    Casu S; Blau J; Schempf B; Haeske D, 2019, 'If you don't take a temperature, you can't find a fever Awareness in out-of-hospital vital signs in cases of suspected sepsis', NOTFALL & RETTUNGSMEDIZIN, 22, pp. 509 - 513, http://dx.doi.org/10.1007/s10049-018-0526-4
    Journal articles | 2016
    Koh YX; Longfield G; Kostalas S, 2016, 'Gastrointestinal: Obscure overt gastrointestinal bleed from jejunal diverticula, a diagnostic challenge', Journal of Gastroenterology and Hepatology Australia, 31, pp. 521, http://dx.doi.org/10.1111/jgh.13211
    Journal articles | 2014
    Kostalas S, 2014, 'Re: Accuracy of visual prediction of pathology of colorectal polyps: How accurate are we?', ANZ Journal of Surgery, 84, pp. 697 - 697, http://dx.doi.org/10.1111/ans.12758
    Journal articles | 2007
    Chauhan S; D'Cruz R; D'Cruz S; Singh R; Sachdev A, 2007, 'Clinical paradigms revisited.', Med J Aust, 186, pp. 382 - 383, http://dx.doi.org/10.5694/j.1326-5377.2007.tb00952.x
    Journal articles | 2007
    Kostalas S, 2007, 'Clinical paradigms revisited.', Medical Journal of Australia, 186, pp. 383, http://dx.doi.org/10.5694/j.1326-5377.2007.tb00953.x
    Journal articles | 2007
    Kostalas S, 2007, 'To the editor: [8]', Medical Journal of Australia, 186, pp. 383
  • Conference Papers | 2020
    Zhang L; Tikhe D; Sin L; Lee H; Emerak G; Edwards P; Abi-Hanna D; Hourigan L; Kostalas S; Bassan M, 2020, 'Fully covered metal biliary stents are associated with increased rates of post-endoscopic retrograde cholangiopancreatography pancreatitis', in JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, WILEY, pp. 11 - 12, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000589476200014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1
    Conference Abstracts | 2010
    Gifford AJ; Jones PS; Khasraw M; Kostalas S; Gill AJ, 2010, '16. Primary choriocarcinoma of the colon – a case report', in Pathology, Elsevier BV, Vol. 42, pp. S85 - S86, http://dx.doi.org/10.1097/01268031-201042001-00187

UNSW Rural Clinical Campus (Port Macquarie) “Contribution towards teaching award” - 2025

Royal Australasian College of Physicians, Wiley Blackwell Publishing Award for “Clinical Excellence in Adult Medicine” - 2012

I have clinical research interests in

1. Endoscopic resection of early gastrointestional neoplasia / Full thickness resection of gastrointestional tract lesions / Advanced interventional Endoscopy

2. Quality in Endoscopy

3. Serrated Polyps / Serrated Polyposis Syndrome (SPS)

Serrated polyps, their epidemiology, detection, optimal resection and risk prediction modelling for dysplastic SSLs forms a large part of my research focus.