Figure 3:

Schematic presentation of the planned and the actual surgical strategies. (a) Preoperatively, middle cerebral artery M1-M2 trapping surgery assisted by superficial temporal artery-middle cerebral artery double-barrel bypass was planned. (b) As the laceration was limited to the superior wall of the M2 superior trunk, M2 clipping was performed assisted by superficial temporary artery-M2 superior trunk bypass to trap the lacerated point and preserve antegrade blood flow from M1 to the M2 inferior trunk. Despite the mild stenosis at the origin of the M2 inferior trunk, superficial temporal artery-M2 inferior trunk bypass was not performed.