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Dr Frederick Koh

Dr Hong Xiang Frederick Koh

​MBBS (S’pore), MRCS (Edin), MMed (Surg), FRCS (Edin), FAMS (Surg)


Sengkang General Hospital

Specialty: Colorectal Surgery, General Surgery

Conditions Treated by this Doctor:
Abdominal Hernia (Ventral Hernia), Colorectal Cancer, Constipation, Diverticular Disease, Faecal Incontinence, Hernia, Inflammatory Bowel Disease.

Clinical Appointments

  • Consultant Colorectal Service Sengkang General HospitalSengkang General Hospital


Dr Frederick Koh is a Consultant in the Department of Colorectal Surgery, Division of General Surgery, Sengkang General Hospital.

Dr Koh graduated from the Yong Loo Lin School of Medicine, National University of Singapore (NUS) in 2012 and received his formal surgical training in National University Health System (NUHS). He completed his membership of the Royal College of Surgeons of Edinburgh (Surgery) in 2014, and obtained the Masters of Medicine (Surgery) from the NUS in 2016. He completed the General Surgery Residency Programme as the Chief Resident for General Surgery in 2019 and become a Fellow of the Royal College of Surgeons of Edinburgh (General Surgery) in 2019. He now practices in Sengkang General Hospital's Department of General Surgery and is subspecialising in Colorectal Surgery.

His clinical interests include the various aspects of colorectal surgical oncology, proctology as well as acute care surgery. Receiving training in both minimally invasive and open surgery, Dr Koh is well versed in both laparoscopic and conventional open techniques of surgery.

Other than clinical contributions, Dr Koh places emphasis on the importance of Academic Surgery. He is published in numerous peer-reviewed journals and enjoys both clinical as well as basic science research, pertaining to the field of General and Colorectal Surgery. He has held grants and has experience in conducting both population-based and trial-based research and intends to continue his pursuit of Academia in order to continue to participate in the continuous improvement to clinical practice to serve his patients best.

Dr Koh also believes in Clinical Education and is active in the development of future doctors and specialists. He was awarded the Dean's Award for Teaching Excellence AY 18/19 by NUS. His contributions to Clinical and Research Education have been recognised with the Role Model Certificate of Commendation and Wong Hock Boon Society, Singapore Medical Association Charity Fund Outstanding Mentor Award.


​MBBS (Singapore)

MRCS (Edinburgh)

MMed (Surgery)

FRCS (Edinburgh)

Professional Appointments and Committee Memberships


  • Dean's Award for Teaching Excellence, NUS, 2018/19
  • Outstanding Mentor Award, Wong Hock Boon Society, Singapore Medical Association Charity Fund, NUS, 2017
  • Role Model Certificate of Commendation, NUS, 2014

Research Interests


1. Tan KK, Frederick H Koh, Tan YY, Jody Liu, Richard Sim. Long-term outcome following surgery for colorectal cancers in octogenarians: a single institution's experience of 204 patients. J Gastrointest Surg. 2012 May;16(5):1029-36.

2. KK Tan, Frederick H Koh, Charles B Tsang, Dean C Koh. Laparoscopic versus an open colectomy in an emergency setting: a case-controlled study. Ann Coloproctol. 2013 Feb;29(1):12-6.

3. Koo YX, Kang ML, Auyong A, Liau GZ, Hoe J, Long M, Koh A, Frederick H Koh, Liu R, Koh G.  Malnutrition in older adults on financial assistance in an urban Asian country: a mixed methods study. Public Health Nutr. 2014 Dec;17(12):2834-43

4. Chan DK, Soong J, Frederick H Koh, Tan KK, Lieske B.  Predictors for outcomes after super-selective mesenteric embolization for lower gastrointestinal tract bleeding. ANZ J Surg. 2016 Jun;86(6):459-63.

5. Frederick H Koh, Lieske B, Tan KK, Charles B Tsang, Dean C Koh. Endowrist versus wrist: A case-controlled study comparing robotic versus hand assisted laparoscopic surgery for rectal cancer. Surg Laparosc Endosc Percutan Tech. 2014 Oct;24(5):452-6.

6. Tan J, Frederick H Koh, Charles B Tsang, Dean C Koh. Robotic versus standard laparoscopic total mesorectal excision for rectal cancer: a comparative study of short-term and oncological outcomes. Robotic Surgery: Research and Reviews 2014:1 13–18

7. Frederick H Koh, Soong J, Lieske B, Cheong WK, Tan KK. Does the timing of an invasive mesenteric angiography following a positive CT mesenteric angiography make a difference? Int J Colorectal Dis. 2015 Jan;30(1):57-61.

8. Lee CL, Lu J, Lim TZ, Frederick H Koh, B Lieske, Cheong WK, Tan KK. Long-term outcome following advancement flaps for high anal fistulas in an Asian population: a single institution's experience. J Gastrointest Surg. 2012 May;16(5):1029-36.

9. Frederick H Koh, Wong J, Tan JK, Tan KK, Cheong WK, Lieske B. Laparoscopic colorectal surgery is safe and benefits octogenarian patients with malignant disease: a matched case-control study comparing laparoscopic and open colorectal surgery. Int J Colorectal Dis. 2015 Jul;30(7):963-8.

10. Frederick H Koh, Kow AW. Minimally Invasive Whipple's Technique for Laparoscopic-Assisted Pylorus-Preserving Pancreaticoduodenectomy. J Am Coll Surg. 2017 Feb;224(2):e1-e3.

11. Frederick H Koh, Shi W, Tan KK. Biliary metastasis in colorectal cancer confers a poor prognosis: case study of 5 consecutive patients. Ann Hepatobiliary Pancreat Surg. 2017 Feb;21(1):57-60.

12. Law JH, Frederick H Koh, Tan KK. Young colorectal cancer patients often present too late. Int J Colorectal Dis. 2017 Aug;32(8):1165-1169

13. Frederick H Koh, Tan KK, Teo LLS, Ang BWL, Thian YL. Prospective comparison between magnetic resonance imaging and computed tomography in colorectal cancer staging. ANZ J Surg. 2018 Jun;88(6):E498-E502.

14. Frederick H Koh, Seah A, Chan DK, Ng JY, Tan KK. Is colonoscopy indicated in young patients with haemotochezia? Gastrointest Tumors. 2018 Feb;4(3-4):90-95.

15. Ng JY, Frederick H Koh, Yeo D, Ng SJ, Tan KY, Tan KK. Patients need to know that ileostomy following anterior resection may not be reversed. Int Surg J. 2018 Jun;5(6):1991-1994.

16. Law JH, Frederick H Koh, Wang S, Tan KK. Curative treatment for metastatic colorectal cancer in the young population: is it worth it? J Gastrointest Oncol. 2019 Feb;10(1):61-67.

17. Frederick H Koh, Chan DKH, Ng J, Tan KK. Adherence to surveillance guidelines following colonic polypectomy is abysmal. J Gastrointest Oncol. 2019 Apr;10(2):166-170.

18. Tan JKH, Ng JJ, Yeo M, Frederick H Koh, Bonney GK, Ganpathi IS, Madhavan K, Kow AWC. Propensity score-matched analysis of early outcomes after laparoscopic-assisted versus open pancreaticoduodenectomy. ANZ J Surg. 2019 May;89(5):E190-E194.

19. Yoong GS, Frederick H Koh, Wee BB, Anil G, Ho P. How to do it: value-driven sharp recanalization of central vein occlusion. ANZ J Surg. 2019 Nov 28. doi: 10.1111/ans.15599. [Epub ahead of print]

20. Chan DKH, Ng J, Frederick H Koh, Lim T, Yeo D, Tan KY, Tan KK. Journey for patients following ileostomy creation is not straightforward. Int J Colorectal Dis. 2019 Dec;34(12):2075-2080.

21. Frederick H Koh, Tan KK. Complete mesocolic excision for colon cancer: is it worth it? J Gastrointest Oncol. 2019 Dec;10(6):1215-1221.

22. Frederick H Koh, Tan KK. A Safe Method for Middle Colic Dissection and Ligation at its Origin in a Laparoscopic Extended Right Hemicolectomy. Ann Surg Oncol. 2016 Dec;23(Suppl 5):665.

23. Frederick H Koh, Tan KK. Fluorescent Angiography Used to Evaluate the Perfusion Status of Anastomosis in Laparoscopic Anterior Resection. Ann Surg Oncol. 2016 Dec;23(Suppl 5):692.

24. Frederick H Koh, Chan HL, Petersson F, Chong CS. Thinking out of the Gut: a case of obscure lower GI bleeding. Gut. 2017 Dec;66(12):2068-2159.

25. Frederick H Koh, Guowei Kim, Jimmy BY So, Fredrik Petersson, Asim Shabbir. An Unfortunate Soul - A Rare Presentation of an Uncommon Pathology for Upper Gastrointestinal Bleeding. ANZ J Surg. 2019 Jun;89(6):776-777.

26. Frederick H Koh, Fong YF, Seet JE, Tan KK. Cyclical haematochezia: an uncommon cause of lower gastrointestinal bleeding. ANZ J Surg. 2019 Jun;89(6):E252-E253.

27. Frederick H Koh, Ng JY, Seow CS, Keh CH. ON-Q pain relief system insertion technique: intraoperative insertion of a pre-peritoneal catheter for continuous local anaesthetic infusion. Ann R Coll Surg Engl. 2020 Feb;102(2):160-161.

28. Chew MH, Frederick H Koh, Ng KH. A call to arms: a perspective of safe general surgery in Singapore during the COVID-19 pandemic. Singapore Med J. 2020 Apr 3. doi: 10.11622/smedj.2020049. [Epub ahead of print]

29. Frederick H Koh, Tan KK. 2014 Integrating Science and Technology to Proctology, Chapter 12, Tan KY in Transdisciplinary Perioperative Care in Colorectal Surgery, Edition 1, 173-188.

30. MH Chew, LWL Ong, Frederick H Koh, A Ng, YHA Tan, BC Ong. Lessons in preparedness – the response to the COVID-19 pandemic by a surgical department in Singapore. March 29, 2020. BJS Cutting Edge Guest post. Available at

Research Trials