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Epidermal panfolliculoma: an adnexal proliferation with advanced follicular differentiation confined to the epidermis


Munir H. Idriss, MD,

Ackerman Academy of Dermatopathology, 145 East 32nd Street, 10th Floor, New York, NY, USA

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Follicular differentiation can be exhibited by a variety of epidermal lesions. We report an example of panfolliculoma purely confined to the epidermis. The lesion presented as a verrucous plaque on the leg of a 55-year-old man. Histopathologic sections showed an acanthoma with follicular differentiation including areas mimicking the follicular germ, matrix, root sheath and infundibular components.