AN ADDITIONAL VARIANT OF THE PERSISTENT PRIMITIVE TRIGEMINAL ARTERY -ACCESSORY MENINGEAL ARTERY - ANTERO-SUPERIOR CEREBELLAR ARTERY ANASTOMOSIS ASSOCIATED WITH MOYAMOYA-DISEASE

Persistent embryological carotid-basilar anastomoses are rare. There h as been no report on persistent anastomosis between the accessory meni ngeal artery and the antero-superior cerebellar artery. We describe a 3-year-old boy with moyamoya disease manifesting such a congenital vas cular anomaly, namely, a large anastomosis between the accessory menin geal artery and the antero-superior cerebellar artery associated with marked hypoplasia of the basilar artery. This persistent Vascular anom aly is considered embryologically as an additional variant of the pers istent primitive trigeminal artery, i.e., a ''stapedo-trigemino-cerebe llar'' variant.