Persistent primitive hypoglossal artery associated with brain stem ischemia in a young patient Persistência da artéria hipoglossal primitiva associada à isquemia do tronco cerebral em paciente jovem

The persistent primitive hypoglossal artery (PPHA) is a carot id-basilar anastomosis. It may be associated with aneurysms, arteriovenous malformations and atherosclerotic disease 1 . We report a case of brain stem ischemia in a young patient due to internal carotid stenosis and PPHA.