Which type of ostomy diverts stool from the ileum?

An ileostomy is indeed the procedure that diverts stool from the ileum, which is the last portion of the small intestine. This type of ostomy is performed when the colon is removed or needs to be bypassed due to diseases such as Crohn's disease, ulcerative colitis, or colorectal cancer. In this procedure, the ileum is brought to the abdominal surface, where a stoma is created.

The primary function of an ileostomy is to allow the output of digestive waste directly from the small intestine, which typically results in a liquid or semi-liquid stool. This is different from a colostomy, which diverts from the colon and can produce a more formed stool. A urostomy, on the other hand, is used to divert urine from the urinary system, and an ascending colostomy diverts stool further along in the colon. Thus, ileostomy is the correct answer when specifically discussing the diversion of stool from the ileum.