肺癌皮肤转移较少见,据报道其发生率约2.80%～350%,此类患者预后凶险,存活时间多不超过半年,作者遇见以皮下结节为首发症状就诊,最后确诊为“原发性肺癌”3例,现报告如下。1　病例报告例1,男,72岁,因腹部皮下结节一月余就诊。不痛、枣大小、质硬、固定,追诉病史,一年前咳?.. The metastasis of lung cancer is rare, and its incidence has been reported to be about 2.80% to 350%. The prognosis of such patients is dangerous and the survival time is less than half a year. The author encountered a subcutaneous nodule as the first symptom, and the final diagnosis was “primary ”Three cases of lung cancer" are reported below. 1 case report case 1, male, 72 years old, because of subcutaneous nodules in the abdomen for more than a month. No pain, jujube size, hard quality, fixation, history of complaints, cough a year ago?