[Follicular mycosis fungoides (FMF): a rare disease].

Follicular mycosis Fungoides (FMF) was first described in 1924. Since the first description, 22 patients with this special form of mycosis fungoides have been published. Clinical features include epidermal cysts as well as follicular papules, nodules and hyperkeratoses. FMF can be confused with acneiform dermatoses. In most cases, infiltrated plaques typical for cutaneous T cell lymphoma are also present. Histology shows a monomorphic CD4+ T cell infiltrate. Treatment and prognosis are similar of those of classical mycosis fungoides. We present one patient with FMF and review the literature of all published cases.