患者男，７８岁，头皮皮疹、溃疡、出血，反复发作１年。患者１年前头皮被树枝划破后出现皮疹，当时未在意。３个月后被划破处出现紫红色斑块，持续２周后出现溃疡、出血，形成硬壳状血痂附着于表面。于当地医院就诊，考虑“皮肤溃疡”，予以外用药（具体不详）治疗后，稍有好 Male patient, 78 years old, scalp rash, ulcer, bleeding, repeated attacks for 1 year. The patient had a rash on his scalp after scratching his branches 1 year ago, and did not care at the time. 3 months after being cut at the Department appeared purple patches, sustained 2 weeks after the emergence of ulcers, bleeding, the formation of crustous blood scab attached to the surface. In the local hospital for treatment, consider “skin ulcer”, to be used externally (specifically unknown) after treatment, slightly better