毛源性囊肿恶性变罕见,现报告二例如下。例1 沈某,女性,45岁,广东藉。患者半年前发现枕部有一肿块,近来生长较快。肿块大小为6.5×2.5×1.5cm,质较硬,活动,表面高低不平。手术见肿块有包膜,囊性感。临床诊断为枕部皮样囊肿。病理检查:梭形皮肤一块,长5cm,中间宽2.8cm。真皮内有一椭圆形色块,长径2.8cm, Hair-derived cysts are rare and the report is now under way. Example 1 Shen, female, 45 years old, borrowed from Guangdong. The patient found a lump in the occipital area half a year ago and has recently grown faster. The size of the mass is 6.5×2.5×1.5cm. The mass is hard, active, and the surface is uneven. Surgical see tumor with capsule, bladder sexy. Clinical diagnosis of occipital dermoid cysts. Pathological examination: spindle-shaped skin, length 5cm, width 2.8cm in the middle. There is an oval color block in the dermis with a major diameter of 2.8cm.