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Images 10.20.1A: Nodular dermatitis, granulomatous + 10.20.1B: Numerous extravasated erythrocytes, siderophages, and fibrocytes = Dermatofibroma An important finding for diagnosis of a dermatofibroma such as this one is seen at the periphery of the lesion, namely, thickened bundles of collagen that seem to be enveloped by mesenchymal cells. In actuality, dermatofibroma is a granulomatous and […]