case_images: PMC11719372_01
case_images: Conical, curving, hyperkeratotic horn with an erythematous base arising the left lateral clavicle.
case_images: gr1.jpg
case_images: PMC11719372_01_gr1.jpg
case_images: fig1
case_images: Physical examination revealed a 12.5 cm long, conical, curving, hyperkeratotic horn protruding from her left lateral clavicle (Fig 1).
case_images: A, Hematoxylin and eosin staining at 20x magnification revealing verrucous acanthosis, invaginated hyperkeratosis, and a lymphocytic infiltrate within the superficial dermis, consistent with an inflamed verruca. B, Hematoxylin and eosin staining at 100x magnification shows the epidermis without cytologic atypia.
case_images: gr2.jpg
case_images: PMC11719372_01_gr2.jpg
case_images: fig2
case_images: Histology revealed verrucous acanthosis, invaginated hyperkeratosis without epithelial atypia, and a lymphocytic infiltrate within the superficial dermis consistent with an inflamed verruca (Fig 2, A and B).