What would happen if the large intestine is removed?

Colostomy/illeostomy. Generally, if the colon needs to be removed for some reason, the surgeon will create a place on the abdominal wall where the intestines can drain. Depending on exactly how much is removed, it may either be a colostomy (from what's left of the colon) or an illeostomy (from the end of the small intestine). A bag is usually worn to catch the feces.