颅底手术和耳部疾病扩大性手术所致的乳突部大缺损，曾采用不同局部肌肉或骨膜旋转皮瓣以减小术后乳突腔，其中最常用的是基蒂在耳甲的骨膜Ｐａｌｖａ瓣，但均存在皮瓣皱缩和上皮化的问题，导致延迟愈合或慢性流脓。该文提倡用耳后肌皮瓣（ＰＭＣ瓣），由耳后皮肤、骨膜、胸锁 Skull base surgery and ear diseases due to mastoid large enlargement surgery, has used different local muscle or periosteal spinous flap to reduce postoperative mastoid cavity, the most commonly used is the pedicle in the periosteum Palva flap, but there are problems of skin flap shrinkage and epithelialization, leading to delayed healing or chronic pus. This article advocates ear muscle flap (PMC flap), from the ear skin, periosteum, chest lock