PMC4802549_01
Depressed, indurated, bound-down hyperpigmented plaques involving anterior thighs (A) and right hip (B).
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Physical examination was remarkable for depressed, indurated, bound-down, hyperpigmented plaques involving her upper anterior thighs, upper arms, and abdomen (Fig 1).
A, Punch biopsy from the right thigh shows thickened collagen bundles extending into the subcutaneous fat, paucity of adnexal structures, and a deep reticular lymphocytic infiltrate (Hematoxylin-eosin stain; original magnification: x4). B, Higher magnification image shows thickened collagen, lymphoplasmacytic infiltrate, and entrapment of the eccrine glands by collagen (original magnification: x20).
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A punch biopsy was performed from the right thigh, and histopathologic evaluation found thickening and homogenization of collagen bundles extending into the subcutaneous fat, paucity of adnexal structures, and a lymphoplasmacytic infiltrate in the deep reticular dermis (Fig 2).