[Mycosis fungoides following non-Hodgkin's cutaneous B-cell lymphoma].

INTRODUCTION

B-cell and T-cell lymphomas are seldom found associated. We report a new case with purely cutaneous lesions. CASE-REPORT. In 1990, a 59-year old man was treated for cutaneous B-cell lymphoma with few lesions. One year later the patient developed a tumoral mycosis fungoides which soon recurred after whole body electron-therapy.

DISCUSSION: The association of two lymphoid blood diseases of different phenotypes is probably not coincidental. It might be related to a particular evolutive profile of T-cell lymphoma, and this leads us to discuss some hypotheses concerning the physiopathology of lymphomas, and notably the cutaneous lymphomas.