Prepyloric mucosal diaphragm.

The present case of PPMD is reported as an example of gastric outlet obstruction which did not produce overt symptoms until a lifespan of more than eight decades had elapsed; yet this lesion is considered to be congenital in origin. The clinical, radiologic and pathologic features of this entity were discussed, based on the present and other reported cases. Under clinical conditions in which the more usual causes of gastric outlet obstruction are not apparent, awareness of this anomaly may be of great significance in the management since simple excision of the membrane is curative.