Today we have a 3-month-old male domestic short haired cat who was donated to the Humane Society because of regurgitation after eating. This one is a classic!
There is focal severe dilation of the esophagus cranial to the heart on the right lateral projection. There is focal leftward deviation of the trachea just cranial to the heart best noted on the VD projection. The heart is enlarged. The pulmonary parenchyma is within normal limits. The liver is enlarged compatible with the patients age. There are only 7 sternal segments.
Segmental severe megaesophagus cranial to the heart base with leftward deviation of the trachea. These radiographic changes are compatible with a persistent right aortic arch. Cardiomegaly may indicate other congenital heart disease.