Abstract

A case is presented of a 49-year-old man with epidermotropic metastatic lung carcinoma who was diagnosed with lung cancer five months earlier. He had a painful dark reddish plaque that was gradually enlarged on the left breast for two months. A skin biopsy specimen showed a multifocal nest of adenocarcinoma which invaded into the epidermis. The case was diagnosed as having a metastatic lung carcinoma with epidermotropism.