The sigmoid colon (pelvic colon), the part of the large intestine that is closest to the rectum and anus
The sigmoid colon is found almost at the end of the GIT in the lower abdomen. It is a continuation of the descending colon and becomes the rectum. I.e. oesophagus --> stomach --> duodenum...
this link is quite useful....chk it out.
As far as I know the only option is surgery. I wish there was another way.
This is a comma = , This is a colon = :