(a) Coronal image of preoperative MRI shows the tumor with cystic lesion on the left middle cerebellar peduncle (arrow). (b) Operative position was right lateral-semiprone position with chin down. (c) The right arm of the patient was placed in front of the neck to the left side and gently supported. (d) An illustrative diagram of the operative posture. Right submandibular lesion was caused by pressure being exerted on the face by this extreme positioning.