A colostomy is performed to divert the flow of stool from the colon to an opening in the abdominal wall, known as a stoma. This procedure may be necessary due to conditions such as colorectal cancer, inflammatory bowel disease, or severe bowel obstructions, where normal bowel function is compromised. By creating a colostomy, surgeons can help patients avoid complications and manage symptoms effectively, allowing for a better quality of life. It can be temporary or permanent, depending on the underlying health issue.
Because they are completely different procedures.
A colonoscopy is the examination of the colon using a CCD camera or fiber optic camera on a flexible tube inserted through the anus.
They attach the end of your intestine to a hole in your stomach instead of anus if too short to reach after bad part cut out, then you have to wear the bag for waste collection. It's a serious operation, what about it specifically are you looking to find out your md hasn't told you and hopefully it is not needed. I am surprised they are assuming without going in for exploratory first, hopefully they are telling you it is only a possibility. In any case, get a second opinion no matter how good your md is if this might be before you bite the bullet