Which type of ostomy involves the removal of the entire colon?

The type of ostomy that involves the removal of the entire colon is an ileostomy. This procedure is often performed when the colon needs to be removed due to conditions such as ulcerative colitis or Crohn's disease. In an ileostomy, the small intestine (ileum) is brought out to the abdominal wall, allowing stool to drain into an external pouch.

While colostomy procedures involve creating an opening from the colon, they do not require the entire colon to be removed. Instead, colostomies often involve diverting a portion of the colon to form an ostomy, depending on the location of the disease or condition being treated. Urinary diversion and urostomy specifically pertain to the urinary system and do not involve the colon at all. Therefore, ileostomy is the correct answer in this context as it corresponds directly to the complete removal of the colon and subsequent creation of a stoma from the ileum.