Folliculotropic mycosis fungoides (FMF) is a variant of mycosis fungoides (MF) with folliculotropic, atypical lymphocytes that may or may not have mucin deposition surrounding the hair follicle. Follicular mucinosis (FM) is a primary or secondary finding in FMF, lupus, or collagen vascular diseases that is only a histological process of mucin deposition surrounding the hair follicles. We present a case of a 6-year-old boy who had features of both FMF and primary follicular mucinosis (PFM). The case reveals key insights on FMF with concurrent FM in pediatric patients and how to differentiate between FMF and PFM.
Our case series is only the second report in the literature demonstrating complete resolution of MF tumors with topical imiquimod. An additional therapeutic option for tumor-stage MF, imiquimod may represent an effective alternative to localized radiation for isolated MF tumors and warrants further investigation in the treatment of various stages of MF.
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