患者：男，２８岁。主诉左侧面部肿物半年。半年前曾有面部外伤，治疗期间发现左侧嚼肌区有一肿物，较硬，无疼痛不适及面瘫等症状，未曾治疗。后觉肿物渐增大，但并无特殊不适。近一个月来肿物生长速度加快，且伴张口受限，近１０ｄ来左侧面部有痛感且张口严重受限，要求... Patient: Male, 28 years old. Chief complaint left facial tumor for six months. Half a year ago had facial trauma, found during treatment there is a mass of the left chewing muscle area, harder, no pain and facial paralysis and other symptoms, has not been treated. After the gradual enlargement of the tumor, but no special discomfort. Nearly a month to speed up the growth of the tumor, and with limited mouth, the past 10 days to the left side of the face pain and mouth severely limited requirements ...