Adjunct A/Prof Dean Koh Chi-Siong

General Surgeon
27 years of experience


General Surgery

Consultation Fee

$160 and above

Clinical Interest

Colorectal Surgery


MBBS (S’pore), FRCS (Edinburgh), FRCS (Glasgow), FRCSEd (General Surgery), FAMS (Surgery)

What I do

Adjunct A/Prof Dean Koh Chi-Siong provides clinical services such as:
- Robotic assisted laparoscopic colorectal surgery
- Endoanal and endorectal ultrasonography
- Colon polyps/tumours
- Rectal polyps/tumours
See more [ + ]- Endoscopy
- Anorectal Surgery
- Faecal Incontinence
- Constipation/Anorectal physiology

See less [ - ]
Pick a clinic location & select time slot to make an appointment

Clinic Locations

Colorectal Clinic Associates
Mount Elizabeth Novena Specialist Centre
38 Irrawaddy Road #10-48/49
Singapore 329563

Colorectal Clinic Associates
Gleneagles Medical Centre #05-07
6 Napier Road, S 258499

Colorectal Clinic Associates
Mt A Hospital Block A
820 Thomson Road, S 574623

There are no appointments available for this week.

Professional Statement

Adjunct A/Prof Dean Koh Chi-Siong was trained in Colon and Rectal Surgery at the Ferguson Clinic/Michigan State University, USA under a Ministry of Health Scholarship in 2003.  While he was in the US, he also received formal training in laparoscopic colon and rectal procedures.  He was also trained in functional anorectal work and is competent in endoanal and endorectal ultrasonography. He has been performing robotic assisted laparoscopic colorectal resections since 2008.  He is the only listed colorectal surgeon in Southeast Asia on the da Vinci surgeon locator.

Adjunct A/Prof Koh was ... See more [ + ]a Senior Consultant in Colorectal Surgery at the National University Hospital before he left for private practice at the Colorectal Clinic Associates in 2012.  He has vast experience in laparoscopic colorectal surgery.  Laparoscopic colon and rectal procedures are his main interest in his practice.
See less [ - ]

Languages Spoken

English, Indonesian, Hokkien, TeoChew, Cantonese, Mandarin


National University of Singapore Faculty of Medicine
See more [ + ]


See less [ - ]

Awards and Publications

Ministry of Health’s Human Manpower Development Programme Scholarship to pursue training in Colon and Rectal Surgery at the Ferguson Clinic/Michigan State University, 2003

Adjunct A/Prof Dean Koh Chi-Siong has been training fellows from Southeast Asia, including Indonesia, Malaysia, Thailand, the Philippines and Vietnam. He has written many papers/articles and book chapters under TTSH, NUH and the Ferguson Clinic on a wide range of colon and anorectal conditions. His key publications involve laparoscopic and robotic colorectal surgery, anal fistula surgery and fecal incontinence surgery. He is often invited to review for the Singapore Medical Journal, Annals Academy of Medicine Singapore, the British Journal of Surgery, the Malaysian Journal of Medical Sciences, and Yonsei Medical Journal. Publications: 1. Laparoscopic-assisted Colon and Rectal Surgery – Lessons Learnt from Early Experience.
DCS Koh, KS Wong, R Sim et al.
Annals Academy of Medicine, Singapore April 2005; 34(3): 223-228
PMID: 15902341 2. 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 3. Molecular Biological Characteristics of Colorectal Polyps in Young Paitents.
D Koh, M Luchtefeld, D Kim, HS Attal, T Monroe, K Ingersall.
See more [ + ] Diseases of the Colon and Rectum March 2005; 48(3): 605. 4. Microsatellite Instability and MLH1 hypermethylation – Incidence and Significance in Colorectal Polyps in Young Patients.
D Koh, M Luchtefeld, D Kim, HS Attal, T Monroe, K Ingersall.
Colorectal Disease 2007; 9: 521-526. PMID: 17573746 5. Small Bowel Obstruction Secondary to Bezoar Impaction: A Diagnostic Dilemma.
TW Ho, DC Koh.
World Journal of Surgery 2007; 31: 1072-1078. PMID: 17420961 6. 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 7. 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 8. Hand-assisted laparoscopic colectomy versus standard laparoscopic colectomy: a cost analysis.
Roslani AC, Koh DC, Tsang CB, Wong KS, Cheong WK, Wong HB.
Colorectal Dis. 2009 Jun;11(5):496-501. PMID: 18662242 9. 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 10. 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 11. Artificial Bowel Sphincter Implantation for Fecal Incontinence in Asian Patients
K. Chittawatanarat ,D C Koh, A ASeah, W K Cheong, C B Tsang.
Asian Journal of Surgery July 2010; 33(3): 134-142
PMID: 21163411 12. 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 13. 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 14. Screening Based on Risk for Colorectal Cancer Is the Most Cost-Effective Approach
Dan YY, Chuah BY, Koh DC, Yeoh KG.
Clinical Gastroenterology and Hepatology. 2011 Nov 16
PMID: 22100624 15. 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 16. 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 17. 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 18. 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, Koh DC, Tsang CB.
Dis Colon Rectum. 2012 Dec;55(12):1273-7.
PMID:23135586 19. Identification of the internal anal opening and seton placement improves the outcome of deep postanal space abscess.
Tan KK, Liu X, Tsang CB, Koh DC.
Colorectal Dis. 2012 Oct 26.
PMID: 23107468 20. 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)

See less [ - ]

Professional Positions and Memberships

Adjunct Associate Professor, Department of Surgery, National University of Singapore
President, Society of Colorectal Surgeons, Singapore
Visiting Consultant, Department of Colorectal Surgery, Singapore General Hospital
See more [ + ] Visiting Consultant, Colorectal Service, KK Women's and Children's Hospital
Member, American Society of Colon and Rectal Surgeons
Member, Endoscopic and Laparoscopic Surgeons of Asia
Member, Singapore Society of Oncology
Former Director of Minimally Invasive Surgery, Division of Colorectal Surgery, NUH
Former Fellowship Director for Colorectal Surgery, Division of Colorectal Surgery, NUH
Former Director, Undergraduate Surgery, Department of Surgery, NUS


See less [ - ]

Accredited Hospitals

Gleneagles Hospital
Mount Alvernia Hospital
Mount Elizabeth Hospital
See more [ + ] Mount Elizabeth Novena Hospital
Parkway East Hospital

See less [ - ]

Insurances Accepted

Cigna / IXChange
Shenton Insurance

Health Articles by Adjunct A/Prof Dean Koh Chi-Siong

What's new in colorectal surgery – the role of minimally invasive techniques in colorectal surgery today

Current Evidence It is no longer a disputed fact – laparoscopy in colorectal resections be...