临床资料患者,男,51岁。因左足外侧缘出现一红色丘疹并缓慢增大7年,于2015年5月20日就诊。7年前,无明显诱患者左足外侧缘出现一绿豆大红色丘疹,无不适,不影响行走。皮损渐增大,明显隆起于皮面,摩擦后易出血。患者既往体健,局部皮肤无外伤史,否认家族遗传病史及类似疾病史。体格检查:一般情况良好,全身浅表淋巴结未触及增大,各系统检查无异常。皮肤科检查:左足外侧缘可见一蚕豆大暗红色 Clinical data patients, male, 51 years old. Due to a red papules on the lateral margin of the left foot and a slowly increasing 7-year visit on May 20, 2015. 7 years ago, there was no obvious appetite appearing on the lateral margin of the left foot of a mung bean red papules, no discomfort, does not affect walking. Lesions gradually increased, obviously uplift in the leather, easy to bleed after friction. Past physical health of patients, no history of local skin trauma, deny family history of genetic disease and similar diseases. Physical examination: generally good, systemic superficial lymph nodes did not increase, the system check no abnormalities. Dermatology examination: the left lateral margin of the broad dark red visible