Successful operative treatment of an aneurysm on a left persistent hypoglossal artery

The authors report on a case of a saccular aneurysm on a primitive hypoglossal artery in a patient who sustained a subarachnoid haemorrhage. The conditions of diagnosing a primitive hypoglossal artery and principles of development are briefly discussed. The first successful direct operative treatment of this rare aneurysm is reported.