The significance of MUM1/IRF4 protein expression and IRF4 translocation of CD30(+) cutaneous T-cell lymphoproliferative disorders: A study of 53 cases

Abstract

Current laboratory technics, clinicopathologic findings cannot always reliably distinguish primary cutaneous CD30(+) lymphoproliferative disorders (LPD), such as lymphomatoid papulosis (LyP), primary cutaneous CD30(+) anaplastic large cell lymphoma (PCALCL), transformed mycosis fungoides (T-MF) and systemic ALK(-) anaplastic large cell lymphoma (ALCL) with skin involvement. We investigated the presence of IRF4 translocation with break apart DNA-FISH method of these entities according to the recent studies of Feldman et al.