A patient complains of pain in the upper poion of his neck on swallowing. He occasionally regurgitates undigested food sholy after eating. Which of the following is the most likely etiology of his problems?
**Core Concept**
The patient's symptoms of pain in the upper portion of the neck on swallowing and occasional regurgitation of undigested food shortly after eating suggest a problem with the pharyngeal phase of swallowing. This phase involves the coordination of muscles to propel food from the mouth, through the pharynx, and into the esophagus.
**Why the Correct Answer is Right**
The most likely etiology of the patient's problems is a Zenker's diverticulum, which is a herniation of the mucosa and submucosa of the pharyngeal wall through a weakness in the muscular wall of the pharynx, known as Killian's dehiscence. This condition can cause symptoms such as dysphagia, regurgitation of undigested food, and pain in the upper portion of the neck on swallowing. The diverticulum can trap food, leading to the regurgitation of undigested food shortly after eating.
**Why Each Wrong Option is Incorrect**
**Option A:** Achalasia is a motility disorder of the esophagus characterized by difficulty swallowing and regurgitation of food, but it typically presents with more severe dysphagia and is often associated with a dilated esophagus. It is less likely to cause pain in the upper portion of the neck on swallowing.
**Option B:** Gastroesophageal reflux disease (GERD) can cause symptoms such as dysphagia and regurgitation, but it is more commonly associated with heartburn and is less likely to cause pain in the upper portion of the neck on swallowing.
**Option C:** Esophageal cancer can cause dysphagia and regurgitation, but it typically presents with more severe symptoms and is often associated with weight loss and difficulty swallowing solids before liquids.
**Option D:** Esophageal stricture can cause dysphagia and regurgitation, but it is less likely to cause pain in the upper portion of the neck on swallowing and is often associated with a history of prolonged esophageal inflammation or caustic ingestion.
**Clinical Pearl / High-Yield Fact**
A Zenker's diverticulum should be suspected in patients who present with dysphagia, regurgitation of undigested food, and pain in the upper portion of the neck on swallowing, particularly if they have a history of difficulty swallowing solids before liquids.
**Correct Answer:** C.