Imiquimod in mycosis fungoides.

Imiquimod is a topically active imidazoquinoline immunomodulator agent. It works as an indirect antiviral and antitumoral and stimulates the production of INF-alpha and various other cytokines. We assayed topical imiquimod in treating early stages of mycosis fungoides. We applied imiquimod 5% cream in four patients with multi-treatment resistant plaques of MF (stages IA and IIB). We applied it on one patient in association with systemic INFalpha-2a. We observed a complete clinical clearance of the lesions in all four patients. In three cases we achieved a complete histopathological clearance and in one case a partial histopathological clearance. The patient treated with imiquimod and systemic INFalpha-2a showed the most spectacular improvement with a rapid total response. We ascribe this improvement to a synergic effect of imiquimod and systemic INFalpha-2a treatment. Before the introduction of imiquimod, this patient had been treated for 2 years with systemic INFalpha-2a alone, without any evidence of clinical response. Imiquimod could be an effective therapy for early-stage disease of CTCL, used alone or in combination with systemic immunomodulatory therapy.