Fig. 1From: Birt-Hogg-Dubé syndrome with simultaneous hyperplastic polyposis of the gastrointestinal tract: case report and review of the literatureFibroepithelial polyp (skin fibroma). a Histological skin sections exhibit a markedly rectified epidermis. In the dermis, mesenchymal cellular proliferation can be observed, consisting of spindle cells with the cytoplasm sometimes indistinct, sometimes spiculated in appearance, containing spindle nuclei without atypia (HE 200x). b The cells are arranged so that “swirls” are sometimes formed among the dense collagenized stroma (HE 400x)Back to article page