Abstract:Necrobiosis lipoidica (NL) is an idiopathic granulomatous disease, frequently associated with diabetes mellitus. Histologically, it is characterized by palisaded granulomas involving the deep dermis, but the epidermis is usually spared. We describe a case of perforating NL (PNL), a rare variant of NL, occurring in an atypical location-an old surgical scar on the elbow-in a 70-year-old, non-diabetic, female patient. Histopathological examination of a skin biopsy demonstrated a palisading granulomatous infiltrat… Show more
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