A case of Apocrine adenocarcinoma on the Bilateral Axillae.

We report here a case of an 89-year-old man with bilateral axillary apocrine adenocarcinoma. He first noticed the nodule on his left axilla in March 2000. We excised the nodule in November 2000. Histopathologically, the tumor was composed of nests with atypical epithelial cells and glands with abundant eosinophilic cytoplasm that exhibited decapitation secretion. Immunohistochemically, the tumor cells were positive for GCDFP-15; thus, we diagnosed this tumor as apocrine adenocarcinoma. In September 2001, he noticed a similar nodule on his right axilla and it was excised again. The histopathological feature of this tumor was almost the same as the tumor on his left axilla. [Skin Cancer (Japan) 2002; 17: 259-263]