Adj Associate Professor
Dean Koh Chi-Siong


MBBS(S’pore), FRCS(Edinburgh), FRCS(Glasgow), FRCSEd(General Surgery), FAMS(Surgery), FASCRS
Senior Consultant
General Surgeon
Colorectal Clinic Associates  


Adjunct Associate Professor
Department of Surgery
National University of Singapore  


Past President 
Society of Colorectal Surgeons,


Visiting Consultant
Department of Colorectal Surgery
Singapore General Hospital 


Visiting Professor
Advanced Laparoscopic Colorectal Course
Institut de Recherge contre les Cancers
de l’Appareil Digestif – ShowChwan
Health Care System Asian Institute
of TeleSurgery Taiwan


Visiting Professor
Advanced Laparoscopic Colorectal
Course Institut de Recherge
contre les Cancers de l’Appareil Digestif
– European Institute of TeleSurgery
(IRCAD-EITS) Strasbourg, France


American Society of Colon and Rectal Surgeons 


Endoscopic and Laparoscopic Surgeons of Asia 


Singapore Society of Oncology

1. The da Vinci Xi: A Review of Its Capabilities, Versatility, and Potential Role in Robotic Colorectal Surgery. 
JC Ngu, CB Tsang, DC Koh.
Robotic Surgery: Research and Reviews 2017;4: 77-85

2Robotic versus standard laparoscopic total mesorectal excision for rectal cancer: a comparative study of short-term and oncological outomes.
JK Tan, FH Koh, CB Tsang, DC Koh.
Robotic Surgery: Research and Reviews 2014;1: 13-18

3. Overcoming Complications in Laparoscopic Low Anterior Resection with the Endo GIATM Radial Reload with Tri-StapleTM Technology.
Clinic Experience – Read more

4. Metastatic Small Bowel Tumours Causing Intestinal Obstruction: A Report of Two Cases.
YY Lee, KK Tan, DC Koh.
International Journal of Case Reports in Medicine, Vol. 2013

5. Outcomes Following Surgery for Distal Rectal Cancers : A Comparison between Laparoscopic and Open Abdomino-Perineal Resection.
Tan KK, Chong CS, Tsang CB, Koh DC.
MedJ Malaysia 2013 Aug; 68: 348-352

6. Managing Deep Postanal Space Sepsis via an Intersphincteric Approach: Our Early Experience.
KK Tan, DC Koh, Tsang CB
Ann Coloproctol. 2013 Apr; 29 (2): 55-59

7. Laparoscopic Versus an Open Colectomy in an Emergency Setting: A Case-Controlled Study
FH Koh, KK Tan, CB Tsang, DC Koh
Ann Coloproctol. 2013 Feb; 29 (1): 12-16

8. Endo-wrist vs wrist: A case-controlled study comparing robotic versus hand assisted laparoscopic surgery for rectal cancer.
FH Koh, KK Tan, B Lieske, ML Tsang, CB Tsang, DC Koh
Surgical Laparoscopy, Endoscopy & Percutaneous Technique 2013 (in press)

9. Identification of the internal anal opening and seton placement improves the outcome of deep postanal space abscess. 
Tan KK, Liu X, Tsang CB, DC Koh.
Colorectal Dis. 2012 Oct 26. PMID: 23107468

10. To LIFT or to Flap? Which Surgery to Perform Following Seton Insertion for High Anal Fistula?
Tan KK, Alsuwaigh R, Tan AM, Tan IJ, Liu X, DC Koh, Tsang CB.
Dis Colon Rectum. 2012 Dec;55(12):1273-7. PMID:23135586

11. Laparoscopy in Colorectal Cancer.
KK Tan, DC Koh.
In: Laparoscopy: New Developments, Procedures and Risks
Editor Hana Terziæ Nova Science Publishers, Hauppauge, New York, USA ISBN# 978-1-61470-747-9

12. Abdomino-perineal Resection – Hand Assisted. 
Goh HS, DC Koh.
In: Master Techniques in Colon and Rectal Surgery
Editors James Fleshner and Steven Wexner WoltersKluwer Health, Philadelphia, USA ISBN# 9781605476438

13. Evaluation and Management of Functional Disorders – Hemorrhoids: Office Based Management. 
DC Koh, M Luchtefeld.
In: Ambulatory Colorectal Surgery, 1st Edition
Editors Laurence R Sands and Dana R Sands Informa Healthcare, New York, USA ISBN# 978-082472792-5

14. Reliability of tumor primary cultures as a model for drug response prediction: expression profiles comparison of tissues versus primary cultures from colorectal cancer patients.
Bellot GL, Tan WH, Tay LL, DC Koh, Wang X.
Journal of Cancer Research and Clinical Oncology. 2011 Dec 21 PMID: 22186935

15. Screening Based on Risk for Colorectal Cancer Is the Most Cost-Effective Approach.
Dan YY, Chuah BY, DC Koh, Yeoh KG.
Clinical Gastroenterology and Hepatology. 2011 Nov 16 PMID: 22100624

16. The anatomy of failures following the ligation of intersphincteric tract (LIFT) technique for anal fistula: A review of 93 patients over 4 years
KK Tan, I Tan, DC Koh, CB Tsang.
Dis Colon Rectum. 2011 Nov;54(11):1368-72 PMID: 21979180

17. A new application of the 4-arm Standard da Vinci ® surgical system: totally robotic assisted left sided colon or rectal resection
DC Koh, SH Kim, CB Tsang.
Surgical Endoscopy 2011 Jun; 25(6):1945-52. PMID: 21136096

18. Artificial Bowel Sphincter Implantation for Fecal Incontinence in Asian Patients
K. Chittawatanarat , DC Koh, A ASeah, W K Cheong, C B Tsang.
Asian Journal of Surgery July 2010; 33(3): 134-142 PMID: 21163411

19. Hand-assisted laparoscopic abdomino-perineal resection utilizing the planned end colostomy site
DC Koh, CW Law, I Kristian, WK Cheong, CB Tsang.
Tech Coloproctol. 2010 Jun;14(2):201-6. PMID: 20428915

20. Natural History of Small ‘Indeterminate’ Hepatic lesions in patients with Colorectal Cancer
GH Lim, DC Koh, WK Cheong, KS Wong, CB Tsang.
Dis Colon Rectum. 2009 Aug;52(8):1487-91. PMID: 19617765

21. Hand-assisted laparoscopic colectomy versus standard laparoscopic colectomy: a cost analysis.
Roslani AC, DC Koh, Tsang CB, Wong KS, Cheong WK, Wong HB.
Colorectal Dis. 2009 Jun;11(5):496-501. PMID: 18662242

22. Emergency Hartmann’s procedure: morbidity, mortality and reversal rates among Asians. 
QM Leong, DC Koh, CK Ho.
Tech Coloproctol (2008) 12:21–25. PMID: 18512008

23. Efficacy of Transarterial Embolization as Definitive Treatment in Lower Gastrointestinal Bleeding.
DC Koh, MA Luchtefeld, DG Kim, MF Knox, BC Fedeson, JS VanErp, BR Mustert.
Colorectal Disease 2008; 11: 53-59. PMID: 18462224

24. Necrotising colitis related to clozapine? A rare but life threatening side effect
QM Leong, KS Wong, DC Koh.
World Journal of Emergency Surgery 2007, 2:21 (21 August 2007) PMID: 17711574

25. Small Bowel Obstruction Secondary to Bezoar Impaction: A Diagnostic Dilemma.
TW Ho, DC Koh.
World Journal of Surgery 2007; 31: 1072-1078. PMID: 17420961

26. Microsatellite Instability and MLH1 hypermethylation – Incidence and Significance in Colorectal Polyps in Young Patients.
DC Koh, M Luchtefeld, D Kim, HS Attal, T Monroe, K Ingersall.
Colorectal Disease 2007; 9: 521-526. PMID: 17573746

27. Molecular Biological Characteristics of Colorectal Polyps in Young Patients.
DC Koh, M Luchtefeld, D Kim, HS Attal, T Monroe, K Ingersall.
Diseases of the Colon and Rectum March 2005; 48(3): 605.

28. Stapled Haemorrhoidectomy: Bothersome Staple Line Bleeding.
Dean CS Koh, Denis MO Cheong, Kutt Sing Wong.
Asian Journal of Surgery 2005; 28(3): 193-197. PMID: 16024315

29. Laparoscopic-assisted Colon and Rectal Surgery – Lessons Learnt from Early Experience. 
DC Koh, KS Wong, R Sim et al.
Annals Academy of Medicine, Singapore April 2005; 34(3): 223-228 PMID: 15902341

30. The Torg-Pavlov ratio in cervical spondylotic myelopathy: a comparative study between patients with cervical spondylotic myelopathy and a nonspondylotic, nonmyelopathic population.
Yue WM, Tan SB, Tan MH, DC Koh, Tan CT.
Spine. 2001 Aug 15;26(16):1760-4. PMID: 11493847