Solitary Sclerotic Fibroma: Dermoscopic Features
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An 89-year-old woman presented with an indurated whitish nodule with superficial vascularization on the fourth finger of her left hand. The lesion had been present for several years. Dermoscopy showed peripheral arborizing vessels against a whitish background and an erythematous halo around the lesion. The lesion was excised and sent for pathologic examination. The diagnosis revealed it as Sclerotic fibroma (SF).

It is an uncommon benign tumor which clinically manifests as a firm, solitary, well-circumscribed, whitish or flesh-colored papule or nodule and typically affects young adults. It is preferentially located on the face and extremities, but has also been described on the trunk, scalp, oral mucosa, and nail bed.

A recent dermoscopic study of SF, the first of its kind, described a homogeneous lesion against a white background with peripheral arborizing vessels and a perilesional erythematous halo. Unlike SF, atypical and late-stage sclerotic dermatofibromas usually have a delicate peripheral pigment network. Although dermoscopy can provide important diagnostic clues, a diagnosis of SF must be histologically confirmed.

Source: https://www.actasdermo.org/en-solitary-sclerotic-fibroma-dermoscopic-features-articulo-S1578219020302833
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