Basaloid folliculolymphoid hyperplasia: a distinctive finding in follicular mycosis fungoides.

Follicular mycosis fungoides is an increasingly recognized subtype of mycosis fungoides. There is great variability in the clinical and histologic presentation of this variant of mycosis fungoides. Epithelial hyperplasia may occur in cutaneous lymphomas, and basaloid induction of the epidermis is a recognized phenomenon in cutaneous neoplasms. We have identified three patients with follicular mycosis fungoides with basaloid folliculolymphoid hyperplasia, a finding that has received little attention in the literature. The patients were all men with prominent follicular papules on the face. We believe that these changes are a distinctive histologic pattern of follicular mycosis fungoides. Hence, we describe the clinical-pathologic findings of basaloid folliculolymphoid hyperplasia in these three patients with follicular mycosis fungoides.