**Question:** All are true about gallstone ileus except

A. Gallstone ileus is a rare complication of cholelithiasis
B. It is characterized by the obstruction of the small intestine by a large gallstone
C. The majority of cases occur in women
D. The treatment involves cholecystectomy (removal of the gallbladder)

**Correct Answer:** **D. The treatment involves cholecystectomy (removal of the gallbladder)**

**Core Concept:**
Gallstone ileus is a rare but potentially life-threatening complication of cholelithiasis, the formation of gallstones in the gallbladder. Cholelithiasis is more common in females, and gallstones can migrate to the gastrointestinal tract, causing an obstruction. Gallstone ileus is characterized by the blockage of the small intestine by a large gallstone. The treatment for gallstone ileus primarily focuses on relieving the obstruction and addressing the underlying cholelithiasis.

**Why the Correct Answer is Right:**
Gallstone ileus is a specific clinical scenario, and cholecystectomy (removal of the gallbladder) is the definitive treatment for cholelithiasis, not gallstone ileus. Gallstone ileus treatment primarily involves the surgical removal of the obstructing gallstone and decompression of the obstructed small intestine. In some cases, a temporary decompression procedure like internal peritoneal drainage may be performed before definitive surgery.

**Why Each Wrong Option is Incorrect:**

**A.** Gallstone ileus is a rare complication of cholelithiasis, but cholecystectomy is the treatment for cholelithiasis, not gallstone ileus.

**B.** Gallstone ileus is characterized by the obstruction of the small intestine by a large gallstone, which is relevant to the condition but does not refute the correct answer.

**C.** Gallstone ileus occurs more frequently in females, but the focus of the correct answer is on the treatment method (cholecystectomy), not gender distribution.

**Correct Answer Explanation:**
Gallstone ileus is a rare but potentially life-threatening complication of cholelithiasis. Cholecystectomy, the surgical removal of the gallbladder, is the primary treatment for cholelithiasis, not gallstone ileus. Gallstone ileus treatment primarily involves the surgical removal of the obstructing gallstone and decompression of the obstructed small intestine. In some cases, a temporary decompression procedure like internal peritoneal drainage might be performed before definitive surgery.

**Why Each Wrong Option is Incorrect:**

**A.** Gallstone ileus is a complication of cholelithiasis, not the treatment method itself.

**B.** Gallstone ileus is characterized by the obstruction of the small intestine by a large gallstone, which is relevant to the condition but does not refute the correct answer.

**C.** Gallstone ileus occurs more frequently in females, but the focus of