D. Abnormal findings 1. Megaesophagus Megaesophagus is a diffuse esophageal distention that can be congenital or acquired. It is much more common in dogs than cats. Megaesophagus is usually diagnosed on survey radiographs. In these instances, an esophagram is indicated.
Complications associated with foreign bodies include perforation and stricture resulting from scar.
Diverticulum An esophageal diverticulum is defined by a focal dilation of the esophagus. When located in the cranial mediastinum, the diverticulum may be seen ventral to the trachea. Strictures can be challenging to diagnose radiographically and usually require an esophagram. Normal esophageal contraction should not be confused with a stricture on static images. If fluoroscopy is not available, persistent narrowing of the esophagus should be seen on multiple views.