患者女，32岁。左背部包块一年余，于1997年11月28日行局部包块切除。查体，左肩胛下角触及一包块，质地较硬，活动度差，压痛不明显。术中见肿瘤位于真皮下并伸展至肌间至肋骨上；肿块大约1.0cm×0.8cm。临床诊断：左背部皮脂腺囊肿。病理检查：梭形皮肤皮下肿块标本。肿块体 Female patient, 32 years old. The left back mass was more than a year old. On November 28, 1997, a partial mass resection was performed. In the physical examination, the lower corner of the left shoulder blade touched a mass, the texture was hard, the activity was poor, and the tenderness was not obvious. During surgery, the tumor was located under the dermis and stretched to the muscles to the ribs; the mass was approximately 1.0 cm x 0.8 cm. Clinical diagnosis: left dorsal sebaceous cyst. Pathological examination: Spinal skin subcutaneous mass specimens. Mass