Keywords Mandibular angle hypertrophy;Retromandibular vein;Mandibular angle osteotomy;Angle of mandible;Masseter;Benign masseteric hypertrophy;

• 下颌角肥大;下颌后静脉;下颌角截骨术;下颌角;咬肌;良性咬肌肥大;