临床资料患者,女,42岁。主因骶尾部暗青色皮下结节20余年,于2014年10月13日就诊。20余年前,无明显诱因患者骶尾左上部出现皮下小结节,无痛痒不适,未经治疗,缓慢增大。近期皮损隆起,表面出现暗青色斑。患者既往体健。家族中无类似疾病患者。体格检查:一般情况可,全身浅表淋巴结未触及肿大,心肺腹未见明显异常。皮肤科情况:骶尾左上方可见一 Patients with clinical data, female, 42 years old. Mainly due to sacrococcygeal dark green subcutaneous nodules more than 20 years, on October 13, 2014 treatment. More than 20 years ago, there was no obvious incentive for patients to appear in the left upper part of the sacrococcygeal small nodules, itching and discomfort, untreated, slowly increased. Recent skin uplift, the surface dark blue spots. Past patient’s health. No similar disease in the family. Physical examination: The general situation can be, systemic superficial lymph nodes did not touch the swollen, no obvious abnormal heart and lung abdomen. Dermatology: sacrococcygeal left one visible