**Question:** All of the following statements about Zenker's diverticulum are true Except:

A. Zenker's diverticulum is a bulging sac-like structure in the posterior pharyngeal wall that extends from the cricopharyngeus muscle to the cricoid cartilage.
B. It is a congenital anomaly that develops due to a failure of the pharyngeal walls to close completely during embryonic development.
C. Zenker's diverticulum is a common symptom-free condition that affects only the elderly population.
D. It is a rare condition characterized by symptoms like odynophagia, dysphagia, and regurgitation of food.

**Correct Answer:** C. Zenker's diverticulum is a common symptom-free condition that affects only the elderly population.

**Core Concept:** Zenker's diverticulum is a bulging sac-like structure in the posterior pharyngeal wall. This condition occurs due to the failure of the pharyngeal walls to close completely during embryonic development, leading to a connection between the pharynx and the esophagus.

**Why the Correct Answer is Right:**

Zenker's diverticulum is a relatively rare condition affecting the posterior pharyngeal wall. Although it can occur at any age, it is more common in the elderly population due to the weakening of the pharyngeal walls and the reduced mobility of the cricopharyngeus muscle. The correct answer (D) describes the actual characteristics of Zenker's diverticulum, which includes symptoms like odynophagia (painful swallowing), dysphagia (difficulty swallowing), and regurgitation of food. These symptoms are not present in all cases, and the condition can occur at any age.

**Why Each Wrong Option is Incorrect:**

A. While the statement about the location of Zenker's diverticulum is accurate, it is not true that it is a congenital anomaly resulting from a failure of the pharyngeal walls to close during embryonic development. Zenker's diverticulum is a postnatal condition, usually diagnosed in adults.

B. Zenker's diverticulum is not a rare condition affecting the elderly population only. It can occur at any age and is not limited to the elderly.

C. Zenker's diverticulum is not a common, asymptomatic condition affecting only the elderly population. As mentioned, the condition can occur at any age and is characterized by symptoms like odynophagia, dysphagia, and regurgitation of food.

D. Although the statement about symptoms is partially correct, it is not true that Zenker's diverticulum is a rare condition affecting only the elderly population. As mentioned, it can occur at any age and is characterized by symptoms like odynophagia, dysphagia, and regurgitation of food.

**Clinical Pearls:**

Zenker's diverticulum is a rare condition affecting the posterior pharyngeal wall, characterized by symptoms like odynophagia (painful swall