Giant fusiform aneurysm at the horizontal portion of the middle cerebral artery in a child--case report.

A 13-year-old boy with a rare giant fusiform aneurysm at the horizontal portion of the middle cerebral artery (M1) presented with progressively severe throbbing headache. The aneurysm was reconstructed by tandem application of nine fenestrated clips and coating of the remnant of the aneurysm. However, he was readmitted 3 months later because of recurrent aneurysms at the proximal and distal M1 portions which had been coated. The aneurysms were trapped after rupture occurred during a second operation. Aneurysm trapping combined with superficial temporal artery-middle cerebral artery bypass surgery may be a better method to treat such aneurysms.