1临床资料患者女,33岁。颈后出现红斑丘疹3年余。3年前患者颈后出现片状红斑,无自觉症状,未予重视和诊治。红斑缓慢增大,其上出现丘疹,伴微痒,偶感自发性疼痛,为明确诊断遂来本科就诊。患者既往无其他重要疾病及慢性病史,家族无 1 clinical data Female patient, 33 years old. More than 3 years after the emergence of erythema rash. 3 years ago, patients with epidermal erythema after the neck, no symptoms, no attention and diagnosis and treatment. Erythema slowly increased, there papules, with itching, sporadic spontaneous pain, to clear the diagnosis came to undergraduate treatment. None of the patients had previous other major and chronic medical conditions, no family history