Abstract
A 62-year-old man noticed a subcutaneous tumor on his scalp approximately one year ago. As only temporal flattening could be achieved following aspiration of its contents, the tumor was resected under local anesthesia. Histopathologically, the tumor was composed of multilocular cysts, whose lumen consisted of columnar cells with eosinophilic cytoplasm. Decapitation secretion and papillary projection of luminal cells into the lumen was noted. There was also a luminal layer of clear cells. The cells were positive for staining with GCDFP-15 and CK7. We considered cystic tumors of apocrine nature, such as apocrine cystadenoma, apocrine hidrocystoma, or apocrine papillary cystadenoma, and diagnosed this tumor as apocrine cystadenoma based on its histological features.Skin Research, 16: 84-87, 2017
