All of the following structures are removed in right hemicolectomy except –
**Core Concept**
A right hemicolectomy is a surgical procedure that involves the removal of the right portion of the colon. This procedure is typically performed to treat cancers, polyps, or other diseases affecting the right side of the colon. The goal of the surgery is to remove the affected segment of the colon while preserving as much of the surrounding tissue as possible.
**Why the Correct Answer is Right**
The correct answer involves identifying the structure that is not removed during a right hemicolectomy. The key structures removed during this procedure include the ascending colon, the proximal two-thirds of the transverse colon, the cecum, the ileocecal valve, and the proximal 10-15 cm of the ileum. However, the distal third of the transverse colon is typically preserved to maintain continuity with the left colon.
**Why Each Wrong Option is Incorrect**
* **Option A:** The ileocecal valve is actually removed during a right hemicolectomy, as it is located at the junction between the ileum and the cecum.
* **Option B:** The ascending colon is removed during a right hemicolectomy, as it is the portion of the colon that is affected by the disease process.
* **Option C:** The proximal two-thirds of the transverse colon are removed during a right hemicolectomy, as they are located on the right side of the colon.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the extent of resection in a right hemicolectomy can vary depending on the location and extent of the disease. The surgeon may need to remove more or less tissue to ensure complete removal of the cancer or other disease process.
**Correct Answer:** D. The distal third of the transverse colon is preserved during a right hemicolectomy to maintain continuity with the left colon.