抄録
A 70-year-old woman visited our hospital with complaints of right hemiparesis and motor aphasia. Neuroradiological studies revealed a giant and partially thrombosed aneurysm at the trifurcation of the left middle cerebral artery (MCA). She was treated by total resection of the aneurysm and arterial transposition following double STA-MCA anastomoses. Perforators originated from the aneurysm were sacrificed, and the inferior devision of the middle cerebral artery was thrombosed in the postoperative period. Unfortunately, she showed a transient deterioration of her neurological status.