You are here:

What is Upper Gastrointestinal Surgery

The human gastrointestinal tract, or GI tract, is an organ system responsible for consuming and digesting food, absorbing nutrients and expelling waste. The tract consists of the stomach and intestines, and is divided into the upper and lower gastrointestinal tracts.

The digestive tract includes the esophagus (or food tube), stomach, small intestine and colon or large intestine/bowel. It begins at the mouth and ends at the anus. Gut motility is the term given to the stretching and contractions of the muscles in the gastrointestinal tract.
Our Centres Of Excellence

Women's Health
ENT, Head and Neck Laser Surgery

Check Now

Meet Our Upper Gastrointestinal Surgery Specialists

Get to know our specialists here at Thomson Hospital Kota Damansara.

Dr Kwan Keat Leong

Consultant General & Gastrointestinal Surgeon
Resident Consultant
General Surgery, Upper Gastrointestinal Surgery
BMedSc (UKM) , MD (UKM) , MS (UKM) , FRCS (Ire) , Fellowship in Oesophageal & Upper Gastrointestinal Surgery (HK) , Fellowship in D2 Gastrectomy (Japan)
Suite Number
Level 1 - S25
Spoken Language
Cantonese, English, Malay, Mandarin

Doctor Availability

Monday9:00am - 1:00pm, 2:00pm - 5:00pm
Tuesday9:00am - 1:00pm, 2:00pm - 5:00pm
Wednesday9:00am - 1:00pm, 2:00pm - 5:00pm
Thursday9:00am - 1:00pm, 2:00pm - 5:00pm
Friday9:00am - 1:00pm, 2:00pm - 5:00pm
Saturday9:00am - 1:00pm

Dr Reynu Rajan

Consultant Upper Gastrointestinal & Bariatric Surgeon
Sessional Consultant
Upper Gastrointestinal Surgery, Bariatric Surgery
MBBS (MAHE, IND) , MS UKM (Surgery) , Fellowship in Bariatric Surgery (Taiwan) , Fellowship in Advance Laparoscopy and Bariatric Surgery (IND)
Suite Number
Level 1 - C-L1-05
Spoken Language
English, Malay

Doctor Availability

Wednesday9:00am - 1:00pm