The fluoroscopic barium esophagram is the primary tool
for the diagnosis of Zenker diverticulum. The diverticulum
appears as an outpouching arising from the midline of the
posterior wall of the distal pharynx near the
pharyngoesophageal junction. This is best identified during
swallowing and is best seen on the lateral view, on which
the diverticulum is typically noted at the C5-6 level.
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