患者,男,65岁。因左侧耳廓间断肿痛,反复溃烂、流脓3年6个月入院。患者自30岁始,无明显诱因,左手背出现一个黄豆大、红色丘疹样物,顶部有黑头,伴疼痛,破溃后有白色皮脂样物溢出,局部出现暗黑色、黏着性出血性痂。血痂自行脱落,遗留瘢痕。此后,患者面部、颈部、四肢和躯干的皮肤 Patient, male, 65 years old. Due to intermittent swelling and pain on the left ear, repeated ulceration, pus 3 years 6 months admission. Patients from the age of 30, no obvious incentive to appear on the left back of a large soybean, red papules, top with blackheads, with pain, rupture of white sebaceous spill, local dark brown, adhesive hemorrhagic scab. Blood scab off their own, leaving scar. Since then, the patient’s face, neck, limbs and trunk of the skin