**Question:** All of the following extraintestinal manifestations of ulcerative colitis respond to colectomy except

A. Arthritis
B. Hepatitis
C. Carditis
D. Perianal disease

**Core Concept:**
Ulcerative colitis is a type of inflammatory bowel disease (IBD) that primarily affects the large intestine (colon). Extraintestinal manifestations involve the involvement of organs or systems other than the gastrointestinal tract. Colectomy is a surgical procedure that involves the removal of the entire colon.

**Why the Correct Answer is Right:**
Colectomy primarily targets the gastrointestinal tract and its inflammation in ulcerative colitis. While colectomy can provide relief from symptoms related to colonic inflammation, it does not address extraintestinal manifestations that involve other organs or systems.

**Why Each Wrong Option is Incorrect:**

A. Arthritis: This manifestation is known as Reiter's syndrome and is a combination of urethritis, conjunctivitis, and arthritis. It is a systemic response to gastrointestinal inflammation and is not directly related to the surgical intervention of colectomy.

B. Hepatitis: Ulcerative colitis-related hepatitis is a rare condition that occurs due to the interaction between gut inflammation and the liver. It is unrelated to colectomy and requires specific liver treatment.

C. Carditis: Carditis is an inflammation of the heart, which is not directly affected by colonic inflammation or colectomy. The condition is typically caused by infections, autoimmune disorders, or other factors unrelated to gastrointestinal inflammation.

D. Perianal disease: Perianal disease includes conditions like fistulas, abscesses, and fissures that can be alleviated by colectomy in some cases. However, not all perianal disease is colonic in origin, and some cases may require surgical intervention beyond colectomy, such as perianal surgery or fistulotomy.

**Clinical Pearl:**
In the context of managing ulcerative colitis, understanding the various manifestations of the disease and their appropriate treatments is critical. While colectomy is a significant intervention for colonic inflammation, it may not address extraintestinal manifestations like arthritis, hepatitis, carditis, and perianal disease. A holistic approach involving a combination of medical treatments and surgical interventions is necessary for optimal management of ulcerative colitis patients.