Back issues No.4 - 2001 / Resident Forum  

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An Asynytomatic Slate-brown Papule on the Left Calf in a 56-year-old-man
Chia-Yi Lu, Tsen-Fang Tsai
Dermatol Sinica 19: 364-365, 2001

Case Report: A 56-year-old man had noticed an asymptomatic slate-brown papule on the left calf for 4 years. The lesion underwent a gradual growth with recent rapid enlargement; no previous trauma history was noted. He was otherwise in good health. The lesion was surgically excised under local anesthesia.
An excisional biopsy from the left calf was stained with hematoxylin-eosin (Fig. 1, 2). Immunohistochemically, the tumor cells stained negatively with desmin and factor VIII RA. The iron stain shows hemosiderin dispersed within the tumor.

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