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Dr Tan Teck Kiang Malcolm

Dr Tan Teck Kiang Malcolm

​MBBS, MRCP, M.Med (Int Med), FRCP (Edin)


Singapore General Hospital

Specialty: Gastroenterology and Hepatology

Sub-specialties: Inflammatory Bowel Disease

Conditions Treated by this Doctor:
Acute and Chronic Viral Hepatitis, Alcoholic Liver Disease, Colonoscopy, Colorectal Cancer Screening, Crohn's Disease, Endoscopic Resection of Polyps and Early Cancers, Gastroscopy, H. Pylori Infection, Inflammatory Bowel Disease, Irritable Bowel Syndrome, Liver Cirrhosis, Microscopic colitis, Non-alcoholic Fatty Liver Disease (NAFLD), Ulcerative Colitis.

Clinical Appointments

  • Consultant Gastroenterology & Hepatology Singapore General HospitalSingapore General Hospital
  • Medical Team Inflammatory Bowel Disease Centre Singapore General HospitalSingapore General Hospital

Academic Appointments

  • Senior Clinical Lecturer (Yong Loo Lin School of Medicine)


​Dr Malcolm Tan graduated from National University of Singapore, Faculty of Medicine in 2005 with MBBS (Singapore). He attained MRCP (UK) and Master of Medicine (Singapore) in 2010. He completed specialist training in Gastroenterology and Hepatology in 2015 and was awarded with a Health Manpower Development Plan (HMDP) programme. From 2015 and 2016, he completed an Inflammatory Bowel Disease (IBD) Fellowship at the renowned John Radcliffe Hospital, Oxford University Hospital in Oxford under the mentorship of Professors Simon Travis and Satish Keshav.

He is also keenly involved medical education, a clinical lecturer for Yong Loo Lin School of Medicine. His past appointments included being the Assistant Programme Director for the Singhealth Junior Residency Programme for Internal Medicine and was a Core Faculty in Singhealth Gastroenterology Senior Residency Programme. He actively participates in teaching medical ethics to specialist trainees, under the auspices of for Singapore Medical Association Centre for Medical Ethics & Professionalism.


  • FRCP (Edin), Royal Colleage of Physicians of Edinburgh (2021)
  • M. Med (Int Med), National University of Singapore, School of Medicine (2010)
  • MRCP (UK), Royal Colleges of Physicians of the United Kingdom (2010)
  • MBBS (Singapore), National University of Singapore, School of Medicine (2005)

Professional Appointments and Committee Memberships

  • Appointment as Member of Joint Committee on Specialist Training (Gastroenterology) Exit Examination Committee, Mar 2020 to date
  • Appointment as Faculty for Advance Diploma in Nursing (Nanyang Polytechnic), Jul 2018 to date
  • Appointment as Associate Programme Director for Singhealth Junior Residency Programme for Internal Medicine, July 2017 to Feb 2021
  • Appointment as Clinical Senior Lecturer, Department of Medicine, Yong Loo Lin School of Medicine, Aug 2018 to date
  • Appointment as Clinical Lecturer, Department of Medicine, Yong Loo Lin School of Medicine, Aug 2015 to Jul 2018
  • Appointment as Core Faculty for Singhealth Gastroenterology Senior Residency Programme, Nov 2017 to Feb 2021
  • Appointment as Physician Faculty for the Singhealth Gastroenterology Residency Program, Jan 2016 to Oct 2017


  • Singhealth Outstanding Faculty Award Academic in Year 2017/2018
  • Awarded Health Manpower Development Plan (HMDP) by Eastern Health Alliance in 2015
  • Caring Award (Silver) Eastern Health Alliance 2015
  • Best Educator Award (Medical, Postgraduate (Residency) Eastern Health Alliance 2014
  • Singhealth Outstanding Faculty Award Academic in Year 2014
  • Best Educator Award (Medical, Postgraduate (Residency) Eastern Health Alliance 2013
  • Singhealth Outstanding Faculty Award Academic in Year 2013
  • Singhealth Best Medical Officer Award for posting to Department of Cardiology, National Heart Centre (Singapore General Hospital) (From May 2010 to Nov 2010)
  • Singhealth Best House Officer Award for posting to Department of General Surgery, Changi General Hospital (From 2 May 2005 to 3 September 2005)

Research Interests

​Inflammatory bowel disease, Colorectal neoplasm


  • Yu Jun Wong, Malcolm Tan, Qishi Zheng, James Weiquan Li, Rahul Kumar, Kwong Ming Fock, Eng Kiong Teo, Tiing Leong Ang. A systematic review and meta-analysis of the COVID-19 associated liver injury Ann Hepatol Aug 31;S1665-2681(20)30161-7. doi: 10.1016/j.aohep.2020.08.064.
  • Kevin Kim Jun Teh , Shu Wen Tay , Kaina Chen , Samantha Jingyun Koh , Yu Jun Wong , Andrew Boon Eu Kwek , James Weiquan Li , Kwong Ming Fock , Eng Kiong Teo , Tiing Leong Ang , Malcolm Teck Kiang Tan. Impact of Enhanced Personal Protective Equipment on Colonoscopy Performance During the COVID-19 Pandemic. Endosc Int Open. 2020 Jun;8(6):E809-E814. doi: 10.1055/a-1167-1703. Epub 2020 Jun 2.
  • Hussain I, Tan M, Veeraraghavan MA, Wang LM, Kwek AEB. Endosonographic Appearances of a Rare Duodenal Tumour, Brunner's Gland Hamartoma. Case Rep Gastroenterol. 2019 Jul 16;13(2):310-320. doi: 10.1159/000501674.
  • Stephanie M Slevin, Lucy C Garner, Conor Lahiff, Malcolm Tan, Lai Mun Wang, Helen Ferry, Borgel Greenaway, Kate Lynch, Alessandra Geremia, Stephen Hughes, Karen Leavens, David Krull, Daniel J B Marks, Katherine Nevin, Kevin Page, Naren Srinivasan, Ruth Tarzi, Paul Klenerman , Simon Travis, Carolina V Arancibia-Cárcamo, Satish Keshav. Lymphocyte Activation Gene (LAG)-3 Is Associated With Mucosal Inflammation and Disease Activity in Ulcerative Colitis. J Crohns Colitis. 2020 Mar 16;jjaa054. doi: 10.1093/ecco-jcc/jjaa054.
  • James Weiquan Li, Tiing Leong Ang, Lai Mun Wang, Andrew Boon Eu Kwek, Malcolm Teck Kiang Tan, Kwong Ming Fock, Eng Kiong Teo. Endoscopic submucosal dissection of colorectal neoplasms: an audit of its safety and efficacy in a single tertiary centre in Singapore. Singapore Med J 2019; 60(10): 526-531
  • Ang TL, Li JW, Wong YJ, Tan YJ, Fock KM, Tan MTK, Kwek ABE, Teo EK, Ang DS, Wang LM. A prospective randomized study of colonoscopy using blue laser imaging and white light imaging in detection and differentiation of colonic polyps.Endosc Int Open. 2019 Oct;7(10):E1207-E1213
  • Malcolm Tan, Lydia White. Book Chapter “Inpatient Care”, Inflammatory Bowel Disease Nursing Manual, Springer Nature Switzerland 2019, pp 423-433
  • S Slevin; M Tan; C Lahiff; K Williamson; A Geremia; S Hughes; K Leavens; K Nevin; D J B Marks; R Tarzi; N Srinivasan; C Arancibia; S Keshav. P064 Intestinal expression of LAG-3 correlates with inflammatory activity and response to biological therapy in ulcerative colitis. Journal of Crohn's and Colitis, Volume 12, Issue supplement_1, 16 January 2018, Pages S125,
  • Wong YJ, Irani FG, Tan M, Teo M. Massive upper gastrointestinal bleeding post-Whipple's surgery from anastomotic varices due to mesenteric hypertension. Endoscopy. 2018 Jul;50(7):E159-E162. doi: 10.1055/a-0595-7507. Epub 2018 May 9.
  • Tan M, East JE. Fitting Balloon Overtube-Assisted Colonoscopy (BOAC) Into the Difficult or Failed Colonoscopy Algorithm. Clin Gastroenterol Hepatol. 2018 Apr;16(4):594-595. doi: 10.1016/j.cgh.2017.11.035
  • Tan M, Lahiff C, Bassett P, Bailey AA, East JE. Efficacy of Balloon Overtube-Assisted Colonoscopy In Patients With Incomplete or Previous Difficult Colonoscopies: A Meta-Analysis. Clin Gastroenterol Hepatol. 2017 Oct;15(10):1628-1630
  • Kumar R, Kwek A,Tan M, Fock KM, Ang TL. Sa1187 Outcomes of Intensive Care Unit (ICU) Patients With Cholangitis Requiring Percutaneous Transhepatic Biliary Drainage (PTBD) and Endoscopic Retrograde Cholangiopancreaticography (ERCP). Gastrointestinal Endoscopy.83(5):AB247-AB8.
  • Li JW, Tan MTK, Ang TL, Teo EK. Chemoprevention trials of GI cancers in Asia. Best Practice & Research Clinical Gastroenterology.29(6):967-78. Dec 2015.
  • Ang TL, Fock KM, Tan MT, Assam PN, Chan ES. Impact of Asia-Pacific guidelines on gastric cancer and Helicobacter pylori infection on prevailing clinical practices. J Dig Dis. Feb 2016;17(2):122-7.
  • Tan M. Importance of defining loss of response before therapeutic drug monitoring. Gut. 2015;64(3):516-7.Mar 2015 Tan M, Ong JP, Teo EK. Achieving deep remission in Crohn's disease: treating beyond symptoms. Annals of the Academy of Medicine, Singapore.  Apr 2014;43(4):200-2.
  • Tan M, Kwek A, Ang TL, Fock KM. Sa1668 Predictors of Persistent Ulcer At Surveillance Endoscopy in Patients With Complicated Duodenal Ulcers. Gastrointestinal Endoscopy.79(5):AB295. May 2014.

Research Trials