Foregut Duplication Cyst of the Hypopharynx.

The article examines the case of a hypopharyngeal foregut duplication cyst containing both gastric and pancreatic tissue. The case involved a neonate who was born with stridor and cyanosis and who required immediate intubation because of airway obstruction due to a large hypopharyngeal mass. Magnetic resonance imaging and computed tomography were helpful in localizing the lesion. The foregut gives rise to the pharynx and its associated structures as well as to the lower respiratory tract, esophagus, stomach, duodenum, and hepatobiliary tract. This paper also review the literature and discuss the pathogenesis of foregut duplication cysts.