Dr. Andrew Siang Yih WONG

Name: Andrew Siang Yih WONG

Present Appointment: Chief of Surgery

Director, Digestive Disease Centre Director, Upper Gastrointestinal & Bariatric Surgery Services Surgical Director, Endoscopy Centre Senior Consultant Department of Surgery Changi General Hospital Singapore

Clinical Associate Professor Yong Loo Lin School of Medicine National University of Singapore

Adjunct Associate Professor Lee Kong Chian School of Medicine Nanyang Technological University

Adjunct Associate Professor Duke-NUS Medical School


Changi General Hospital 1. Member, The Medical Device Oversight Committee, 1 Oct 17 – 31 May 2020 2. Deputy Chairman, National Colorectal Cancer (NCRC) Screening Credentialing

Committee, 1 Jan 17 – 31 May 2020 3. Director, Digestive Disease Centre (1 April 2015 – current) 4. Chief of Surgery (8 Oct 2014 – current) 5. Director, Upper Gastrointestinal Surgery Service (2008 – 31 Dec 18) 6. Director, Bariatric Surgery Service (2009 – current) 7. Co-Director, Endoscopy Centre (2012 – 31 Dec 18) 8. Chairman, Laparoscopic Procedures Credentialing Committee (2011 – 31May20) 9. Member, Medical Board Committee (Oct 2014 – 31 May 20) 10. Member, GI Endoscopy Credentialing Committee (2012 – 31 May 2020)


Dr Andrew S Y WONG

SingHealth / Ministry Of Health/ National 1. Member, Academic Council for Surgery Academic Clinical Program, SingHealth-

Duke-NUS Academic Medicine, 1 Jul 17 – 31 Dec 20 2. Member, Residency Advisory Committee for General Surgery (15 Sep 2015 –

14 Sep 2021) 3. Physician Faculty, SingHealth General Surgery Residency Programme (2014 –

30 June 2019) 4. Associate Programme Director, SingHealth General Surgery Residency

Programme (2013 – 2014) 5. Clinical Core Faculty, SingHealth General Surgery Residency Programme (2009

– 2013) 6. Member, Clinical Competency Committee, SingHealth General Surgery

Residency Programme (2010 – current) 7. Secretary, Executive Council, Obesity & Metabolic Surgery Society of Singapore

(2011 – 2015) 8. Treasurer, Executive Council, Obesity & Metabolic Surgery Society of Singapore

(2011 – 2014) 9. Member, Medical Specialist Panel for General Surgery, Work Injury

Compensation Medical Board, Ministry of Manpower (August 2013 – current) 10. Member, Gastric Cancer Awareness Month Committee, Singapore Cancer

Society (2014 – current) 11. Member, Singapore Gastric Cancer Consortium (2003 – current)


Academic, Teaching & Editorial Appointments 1. Adjunct Associate Professor, Lee Kong Chian School of Medicine, 1 Sep 17 – 30

Jun 20 2. Adjunct Associate Professor, Duke-NUS Medical School, 2018 3. Reviewer, Journal of Gastroenterology and Hepatology (Ms: JGH-00690-2016) 4. Clinical Associate Professor, Yong Loo Lin School of Medicine, National

University of Singapore (1 December 2015 – 31 May 2021) 5. Examiner, JCST/RCSED/CSHK Joint Specialty Fellowship Examination in

General Surgery (2015 – current) 6. Reviewer, International Journal of Surgery Case Reports (2014-2017) 7. Reviewer, Indian Journal of Surgery (2013-2017) 8. Reviewer, Singapore Medical Journal (2005-2017) 9. Reviewer, Annals, Academy of Medicine Singapore (2011-2017) 10. Assessor, Final MMed Surgery Dissertation (2014 – current) 11. Examiner, Joint Primary MMed/MRCS Part B OSCE Examination (2013 – 2017) 12. Examiner, Final MBBS Examinations, Yong Loo Lin School of Medicine, National

University of Singapore (2009/2010, 2010/2011, 2011/2012, 2012/2013, 2013/2014, 2014/2015, 2015/2016, 2017/2018)


Dr Andrew S Y WONG


Papers & Books Published

2018 Genomic and Epigenomic Profiling of High-Risk Intestinal Metaplasia Reveals Molecular Determinants of Gastric Cancer Progression. Cancer Cell 8 Jan 2018. Kie Kyon Huang, Kalpana Ramnarayanan, Feng Zhu, Supriya Srivastava, Chang Xu, Angie Lay Keng Tan, Minghui Lee, Suting Tay, Kakoli Das, Manjie Xing, Aliya Fatehullah, Syed Muhammad Fahmy Alkaff, Tony Kiat Hon Lim, Jonathan Lee, Khek Yu Ho, Steven George Rozen, Bin Tean Teh, Nick Barker, Chung King Chia, Christopher Khor, Choon-Jin Ooi, Kwong Ming Fock, Jimmy So, Wee Chian Lim, Khoon Lin Ling, Tiing Leong Ang, Andrew Wong, Jaideepraj Rao, Andrea Rajnakova, Lee Guan Lim, Wai Ming Yap, Ming Teh, Khay-Guan Yeoh, Patrick Tan

2017 Roux-en-Y or Billroth II Reconstruction After Radical Distal Gastrectomy for Gastric Cancer – A Multicenter Randomized Controlled Trial. Annals of Surgery 2018; 267:236-242. Jimmy Bok-Yan So, Jaideepraj Rao, Andrew Siang-Yih Wong, Yiong- Hwak Chan, Ning Qi Pang, Amy Yuh Ling Tay, Man Yee Yung, Zheng Su, Janelle Niam Sin Phua, Asim Shabbir and Enders Kwok Wai Ng

Our Clinical Experience of Self-Expanding Metal Stent for Malignant Central Airway Obstruction. J Clin Med Res. 2017:9(1):58-63. Akash Verma, Chee Kiang Phua, Qiu Mei Wu, Wen Yuan Sim, Audrey Wee Chuan Rui, Soon Keng Goh, Benjamin Ho, Ai Ching Kor, Andrew SY Wong, Albert YH Lim, Dessmon YH Tai, John Abisheganaden

2016 Insight into the da Vinci® Xi – technical notes for single-docking left-sided colorectal procedures. The International Journal of Medical Robotics and Computer Assisted Surgery 2016 Dec. James Chi-Yong Ngu, Sarah Sim, Sulaiman Yusof, Chee-Yung Ng, Andrew Siang-Yih Wong

Long term outcome of Barrett’s esophagus in Singapore. Journal of Gastroenterology and Hepatology 2016 (31) 21-26. Camelia Qian Ying Tang, Tiing Leong Ang, Daphne Shih Wen Ang, Sean Wei Hong Lai, Andrew Boon Eu Kwek, Andrew Siang Yih Wong, Kwong Ming Fock

“Can venous base excess replace arterial base excess as a marker of early shock and a predictor of survival in trauma?”. Ramesh Wijaya, Jia Hui Ng, Lester Ong, Andrew Siang Yih Wong. Singapore Med J 2016;57(2):73-76

“Para-oesophageal and parahiatal hernias in an Asian acute care tertiary hospital: an underappreciated surgical condition”. Ye Xin Koh, Lester Wei Lin Ong, June Lee, Andrew Siang Yih Wong. Singapore Med J 2016; 57(12): 669-675

“Transanal natural orifice specimen extraction in colorectal surgery: bacteriological and oncological concerns”. James Ngu and Andrew Siang Yih Wong. ANZ J Surg 86 (2016) 299-302

Dr Andrew S Y WONG

“Small bowel obstruction in the virgin abdomen: time to challenge surgical dogma with evidence”. Yvonne Ying-Ru Ng, James Chi-Yong Ngu and Andrew Siang-Yih Wong. ANZ J Surgery (2016) doi: 10.1111/ans.13714

2015 “Peculiar case of calcifying fibrous tumour presenting as a free-floating intraperitoneal body”. Jia Lin Ng, Hema Parag Salkade, Sulaiman Bin Yusof, Wee Teng Poh, Andrew Siang Yih Wong. J Case Rep Images Surg 2015;1:29-33

“Laparoscopic Management of Complicated Foreign Body Ingestion: A Case Series”. Daryl K. A. Chia, Ramesh Wijaya, Andrew Wong, Su-Ming Tan. Int Surg 2015;100:849-853, DOI: 10.9738/INTSURG-D-14-00238.1

Letter to the Editor: “Schistosomal appendicitis with portal hypertension”. Ramesh Wijaya, Jia Hui Ng, Shoun Tan, Andrew SY Wong. Int J Colorectal Dis DOI 10.1007/s00384-015-2156-3; Published online: 20 February 2015

2014 Perforated duodenal diverticulum as an unusual sequelae of intestinal obstruction. Koh YX, Chok AY, Wong AS. ANZ Surgery 2014 May 30 epub ahead of print.

The use of a second biopsy from the gastric body in the detection of Helicobacter pylori using rapid urease test during gastroscopy. Wong SYA, Ching SS, Long AS. Singapore Med J 2014; 55(12): 644-647.

Resolving The Diagnostic and Management Dilemma: A Case of Giant Sporadic Mesenteric Fibromatosis and Review Of The Literature. Ramesh Wijaya, Manraj Singh, Adrian Jit Hin Koh, Andrew Siang Yih Wong. World Journal of Colorectal Surgery. Volume 4, Issue 4, 2014, Article 5.

2013 Secondary stent-in-stent self-expanding metallic stent placement for early stent occlusion due to mucosal oedema in the gastrojejunal anastomosis after palliative subtotal gastrectomy for locally advanced gastric cancer. Aik-Yong Chok, Ye-Xin Koh, June Lee, Andrew Siang-Yih Wong. Singapore Med J 2013; 54(12): e240- e243.

Systematic Endoscopic Surveillance in a High-Risk Cohort is Feasible for the Detection of Early Gastric Neoplasia (Abstract). Lee Guan Lim, Zhu Feng, Khek-Yu Ho, Chia Chung-King, Christopher J. Khor, Choon- Jin Ooi, Kwong Ming Fock, Jimmy B. So, Wee Chian Lim, Khoon-Lin Ling, Tiing Leong Ang, Andrew S. Wong, Andrea Rajnakova, Ming Teh, Supriya Srivastava, Khay Guan Yeoh. Gastroenterology; Vol 144, Issue 5, Supplement 1, Page S-95-S-96.

Laparoscopic mesh repair of parahiatal hernia: A case report. Pei Shi Lew, Andrew Siang Yih Wong. Asian J Endosc Surg 6 (2013) 231-233.

2012 Bariatric surgery in Singapore from 2005 to 2009. Rajat Goel, Amit Agarwal, Asim

Dr Andrew S Y WONG

Shabbir, Jimmy So, Shanker Pasupathy, Andrew Wong, Anton Cheng, Davide Lomanto. Asian Journal of Surgery; (2013) 36, 36-39.

Rare cause of acute surgical abdomen with free intraperitoneal air: Spontaneous perforated pyometra. A report of 2 cases. Siew Fung Lim, Song Liang Lee, Adrian Kah Heng Chiow, Chek Siang Foo, Andrew Siang Yih Wong, Su-Ming Tan. Am J Case Rep; 2012; 13:55-57.

Laparoscopic Mesh Repair of Parahiatal Hernia (Abstract). Andrew SY Wong, PS Lew. Diseases of the Esophagus; Volume 25, Issue Supplement S1.

Risk Stratification for Gastric Cancer Using Serum Pepsinogen and Helicobacter pylori Serology in a Chinese Population (Abstract). Yip C. Benjamin, Zhu Feng, Khek-Yu Ho, Khor Christopher, Lee Guan Lim, Jimmy B. So, Chia Chung-King, Wee Chian Lim, Jaideepraj Rao, Ming Teh, Supriya Srivastava, Sunil Sethi, Khoon-Lin Ling, Choon Jin Ooi, Tiing Leong Ang, Kwong Ming Fock, Andrew S. Wong, Khay Guan Yeoh. Gastroenterology; Vol 142, Issue 5, Supplement 1, S631.

2011 Bariatric Surgery in Asia in the Last 5 Years (2005-2009). Davide Lomanto & Wei-Jei Lee & Rajat Goel & Jeannette Jen-Mai Lee & Asim Shabbir & Jimmy BY So & Chih- Kun Huang & Pradeep Chowbey & Muffazal Lakdawala & Barlian Sutedja & Simon K. H. Wong & Seigo Kitano & Chin Kin Fah & Hildegardes C. Dineros & Andrew Wong & Anton Cheng & Shanker Pasupathy & Sang Kuon Lee & Paisal Pongchairerks & Tran Binh Giang. Obes Surg; Epub 2011 Oct 28.

2008 Esophageal pH profile following laparoscopic total fundoplication compared to anterior fundoplication. ASY Wong, JC Myers, GG Jamieson. J Gastrointest Surg; 2008 Aug;12(8):1341-5. Epub 2008 Feb 26.

2004 Delayed presentation of a patient with a ruptured diaphragm complicated by gastric incarceration and perforation after apparently minor blunt trauma. Goh BKP, Wong ASY, Tay KH, Hoe MNY. Can J Emerg Med 2004; 6(4):277-80.


  1. Member, Obesity & Metabolic Surgery Society of Singapore. 2. Member, International Federation for the Surgery of Obesity and Metabolic

Disorders. 3. Member, Singapore Medical Association. 4. Fellow of the Royal College of Surgeons of Edinburgh. 5. Fellow of the College of Surgeons, Academy of Medicine, Singapore.


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