Zenker's diverticulum is located at Killian's dehiscence, just above which structure?

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Multiple Choice

Zenker's diverticulum is located at Killian's dehiscence, just above which structure?

Explanation:
Zenker's diverticulum forms in Killian's dehiscence, a weakness in the posterior wall at the pharyngoesophageal junction between the thyropharyngeus and cricopharyngeus muscles. This location sits just above the upper esophageal sphincter, whose cricopharyngeus component forms that sphincter. So the diverticulum develops immediately superior to the upper esophageal sphincter. The other options refer to parts of the stomach or the distal esophagus and are not related to this region.

Zenker's diverticulum forms in Killian's dehiscence, a weakness in the posterior wall at the pharyngoesophageal junction between the thyropharyngeus and cricopharyngeus muscles. This location sits just above the upper esophageal sphincter, whose cricopharyngeus component forms that sphincter. So the diverticulum develops immediately superior to the upper esophageal sphincter. The other options refer to parts of the stomach or the distal esophagus and are not related to this region.

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