巨大な腫瘤を形成したエクリン汗孔癌の1例

概要

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Eccrine porocarcinoma is a rare neoplasma which differentiates toward intraepidermal eccrine sweat duct. We experienced a 73-year-old man who suffered from a tumor on the right forearm. The tumor was 95×76×60mm in size, dark red and pedunculated, and had been growing slowly in the last 40 years. Histopathological findings showed the irregularly outlined nests which were continuous to the epidermis. The tumor cells had atypical nuclei and clear cytoplasms. The clear cells were partially vacuolated. In addition to ductal and cystic structures, cuticle formation was also present.Wide local excision and lymph node dissections of antecubital and axillary areas were performed, and postoperative adjuvant radiation was added to the regional lymph node areas. However, 1.5 years later after operation, he died of lung metastasis.