Combined Papillated Bowen Disease and Clear Cell Atypical Fibroxanthoma.

We describe a case of papillated Bowen disease (PBD), associated with a clear cell atypical fibroxanthoma (CCAFXA). The epidermal lesion showed a bowenoid papillomatous growth pattern with histologic features suggestive of infection by human papilloma virus (HPV). In the dermis a neoplasm made up by spindled or polygonal cells with wide clear cytoplasm and moderate nuclear pleomorphism was found.

Renal translocation carcinoma with expression of TFEB: presentation of a case with distinctive histological and immunohistochemical features.

The authors describe a case of renal cell carcinoma with t(6; 11) (p21; q12) in a 22-year-old man. The tumor showed typical histological features of this neoplasm with 2 types of cells and hyaline nodules surrounded by small cells. Characteristically, the tumor showed cystic lumina with hyaline-papillary structures inside and in some areas large and irregular intratumoral vessels.