临床资料患者,男,58岁。主因头皮肿物4年,于2012年3月于我科门诊就诊。患者4年前头皮出现一绿豆大小的肿物,类圆形,表面基本光滑,缓慢生长,至就诊时约有蚕豆大小,从无破溃,无疼痛等自觉症状。体格检查:全身状况良好,全身浅表淋巴结未扪及增大,各系统检查未见异常。皮肤科检查:头皮见一0.8cm×0.8cm大小的淡红色肿物,类圆形(图1),境界清楚,表面有轻微擦破,无压痛。实验室检查:血、尿、 Clinical data patients, male, 58 years old. The main cause of scalp tumor for 4 years, in March 2012 in our clinic. Four years ago, the patient showed a green bean-sized tumor in the scalp. The surface of the scalp was round and the surface was smooth and slowly growing. About the size of faba bean at the time of diagnosis, there were no symptoms such as ulceration and pain. Physical examination: the general condition is good, systemic superficial lymph nodes have not palpable increased, the system check no abnormalities. Dermatology examination: the scalp to see a size of 0.8cm × 0.8cm light pink mass, round (Figure 1), the realm of clear surface with a slight rub, no tenderness. Laboratory tests: blood, urine,