Mycosis fungoides and kaposi’s sarcoma association in an HIV-negative patient

The association of mycosis fungoides and kaposi’s sarcoma in hiv-negative patients is a rare phenomenon. the presence of human herpesvirus 8 (hhv-8) – associated with all forms of kaposi’s sarcoma – has also been recently identified in mycosis fungoides lesions. however,a causal association between hhv-8 and the onset of mycosis fungoides has not been established yet. the present case reports a patient who developed kaposi’s sarcoma lesions after a two-year uvb phototherapy to treat a mycosis fungoides. negative immunohistochemistry staining for kaposi’s sarcoma-associated herpesvirus in the initial mycosis fungoides lesions strengthens the absence of a link between kaposi’s sarcoma-associated herpesvirus and mycosis fungoides. immunosuppression caused by the lymphoma and prolonged phototherapy were probably the contributing factors for the onset of kaposi’s sarcoma. © 2016 by anais brasileiros de dermatologia.