Surgery for ulcerative colitis involves removing the entire diseased colon, and either bringing out the end of the bowel as a permanent opening on the skin when the stool drains into a bag, or fashioning a new rectal pouch from the remaining bowel and preserving the normal anal passage. In the elective or non-emergency situation, the operation is usually safe, but in emergencies the mortality may approach 10%. I do not have much knowledge of the Mumbai medical scene, but I do know Dr Sanjay Nagral of Jaslok and Dr SK Mathur of Wockhardt hospital perform both these procedures.