1临床资料患者女,56岁。头顶部结节7年余。7余年前患者无明显诱因头顶部出现一黄豆大粉红色结节,无自觉症状,未予诊治。后结节缓慢增大。体检:系统检查无异常。皮肤科情况:头顶部见一直径约1.5cm的类圆形结节,粉红色,表面光滑,无鳞屑,其上有头发,质硬,无触痛(图1)。皮损组织病理示:表皮基 1 Clinical data Female patient, 56 years old. Head nodules more than 7 years. 7 years ago, there was no obvious incentive for patients with a large top of the head of a large pink nodules, no symptoms, no diagnosis and treatment. After nodules slowly increased. Physical examination: No abnormality in system examination. Dermatology: The top of the head sees a round, nodular, ca. 1.5 cm in diameter, pink, smooth, and scaly, with hair on it, hard and without tenderness (Figure 1). Pathological lesions showed: epidermal base