A Case of Follicular Mycosis Fungoides / 대한피부과학회지

A follicular mycosis fungoides(FMF) is an unusual clinical and histological variant of mycosis fungoides(MF), characterized by selective involvement of hair follicles by atypical lymphocytes with folliculotropism. FMF is more refractory to treatment, and has a worse prognosis than classic MF. We report a case of FMF presenting as follicular papules on the left forearm in a 43-year-old man. Histologic findings showed an infiltration of mycosis cells within and around follicles and Pautrier's microabscess in the follicular epithelium without mucinosis.