Invasive Basal Cell Carcinoma with Metaplastic Bone Formation Associated with a Long‐Standing Dermatofibroma

Abstract
A nodule present for many years on the right leg of a 77-year-old woman was excised and studied by light microscopy. An invasive keratinizing basal cell carcinoma associated with metaplastic bone formation, arising within a dermatofibroma, was found.

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