Large cell mycosis fungoides at the tumor stage. Unusual T8, T4, T6 phenotypic expression.

We report a case of mycosis fungoides in a 52-year-old woman with a huge skin tumor on her thigh in which the predominant cells were lymphoblastic and histiocytic large cells. The neoplastic cells showed strong suppressor and helper T-cell subset markers, and were partially positive for the cortical thymocyte (OKT6) subset marker.