[Treatment of a giant serpentine type middle cerebral artery aneurysm with a high-flow bypass from the petrous internal carotid artery].

: A case report of a giant serpentine type aneurysm arising from the M1 segment of the middle cerebral artery (MCA) treated with a high-flow external saphenous vein graft from the petrous segment of the internal carotid artery is presented. The steps and challenges of this demanding surgical technique are also described. The elements to be taken into consideration in the indication, design and realization of the bypass surgery in the treatment of the MCA aneurysms are discussed.