病例:男,40岁。因四肢皮肤出现肿块6个月采诊。因患甲亢,8个月前接受甲状腺次全切除术,术后甲亢症状完全缓解。术后2个月两胫前出现2个约鸡蛋大小的肿块,进行性增大。同时,双手背也出现许多黄豆大小的肿块,无痛痒感。考虑肿瘤性病变。查体:双侧食指、中指、无名指、小指第2、3指节背侧有对称性多发性0.5cm×0.5cm大小的红褐色隆起,两胫前各有1个巨大瘤样红褐色隆起,与周围皮肤分界清晰,右侧为20cm×24cm大小,左侧 Case: Male, 40 years old. Due to extremities skin lumps 6 months for consultation. Due to hyperthyroidism, subtotal thyroidectomy 8 months ago, postoperative hyperthyroidism symptoms completely relieved. 2 months after the two tibia appeared 2 about the size of the egg mass, progressive increase. At the same time, many backs also appeared in many soy size lumps, no itching. Consider neoplastic lesions. Physical examination: bilateral index finger, middle finger, ring finger, little finger on the dorsal side of the second and third knuckles of multiple red 0.5cm × 0.5cm size reddish brown bulge, two before the tibia each have a huge tumor-like reddish brown bulge, Clear boundary with the surrounding skin, right side of the size of 20cm × 24cm, left