Enlargement of a cerebral aneurysm associated with ruptured arteriovenous malformation.

Enlargement of a small aneurysm during an eleven year period was encountered in a 32-year-old man who had experienced intracranial haemorrhage from a distally located AVM. Clipping of the feeding artery together with the aneurysmal neck was performed. It was very rare to observe the aneurysmal growth associated with the AVM. This case was considered worth reporting as supporting evidence that hemodynamic stress plays an important role in the development of an aneurysm.