Mediastinal foregut cyst containing an intramural adrenal cortical rest: a case report and review of supradiaphragmatic adrenal rests.

We present a case of a baby girl with a congenital cystic mediastinal mass which was excised at 20 months of age and was found to be a developmental foregut cyst of the gastroenteric type. Within the cyst wall was an adrenal cortical rest. Adrenal cortical rests arising above the diaphragm are exceedingly rare and previous cases are reviewed.