Kommerell's diverticulum

Etiology

• congenital anomalies of the aortic arch

Pathology

• aberrant left subclavian artery in the setting of a right sided aortic arch

Clinical manifestations

• may be asymptomatic
• esophageal obstruction may occur
• tracheal obstruction may occur

Radiology

• chest X-ray
  • a small rounded density may be seen left of the trachea
• computed tomography or magnetic resonance imaging
  • bulbous enlargement of proximal subclavian artery at its origin from aortic arch, posterior to esophagus
• barium swallow an impression may be seen on left side of esophagus

Notes

• orginally described as a diverticular outpouching at origin of an aberrant right subclavian artery with a left sided aortic arch

More general terms

• diverticulum
• congenital anomaly (birth defect)
• arterial disease