1临床资料患者女,79岁。右小腿出现暗红色丘疹,并逐渐增大3年余。约3年前,无明显诱因患者右小腿伸侧出现一米粒大暗红色丘疹,不伴疼痛和瘙痒,未予诊治。皮损逐渐增大至直径约2.5cm的结节。发病以来,精神、睡眠及食欲可。否认发疹前局部有蚊虫叮咬及外伤史。体检:全身浅表淋巴结未触及肿大,系统检查未见异常。皮肤科情况:右小腿伸侧可见一直径 1 Clinical data Female patient, 79 years old. Dark red papules appear on the lower leg, and gradually increased more than 3 years. About 3 years ago, there is no obvious incentive to appear on the right leg leg extension of a large dark red papules, without pain and itching, no diagnosis and treatment. Lesions gradually increased to a diameter of about 2.5cm nodules. Since the onset, the spirit, sleep and appetite can be. Denied the pre-rash local mosquito bites and trauma history. Physical examination: systemic superficial lymph nodes did not touch the swollen, no abnormalities in the system examination. Dermatology: right leg extension side can be seen a diameter