Fig. 3

Skin biopsy from a red-brown papule on the right dorsal hand (Fig. 2) demonstrated numerous multinucleated histiocytes (arrows) infiltrating between the collagen bundles in the superficial dermis. There is a Grenz zone separating the epidermis from the dermal tumor. Additionally, there are an increased number of blood vessels amongst the histiocytes, as well as scattered lymphocytes