Mycosis-Fungoides Palmaris Et Plantaris

Background: Mycosis fungoides primarily localized to the palms and soles is rare and has been previously reported as cutaneous lymphoma in four patients or as Woringer-Kolopp disease in eight patients.Observations: Four patients were initially diagnosed and treated unsuccessfully for various palmoplantar dermatitides until histopathologic findings revealed mycosis fungoides. Each case exhibited a clonal rearrangement of T-cell receptor gamma genes and immunohistochemical studies consonant with mycosis fungoides. All patients had limited skin involvement without evidence of extracutaneous involvement.Conclusions: Mycosis fungoides palmaris et plantaris is an uncommon expression of mycosis fungoides that manifests primarily on the palms and soles and clinically may mimic various inflammatory palmoplantar dermatoses. A biopsy is recommended in the evaluation of recalcitrant palmoplantar dermatoses.