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Histomicrograph depicting erythema nodosum. A, A scanning magnification of the skin biopsy sample from our patient depicts the presence of septal panniculitis. B, A closer magnification of the histomicrograph shows that the subcuticular septa are expanded by an infiltrate composed of epithelioid histiocytes with aggregates of foreign body–type multinucleated giant cells, admixed with Miescher radial granulomas. (A and B, Hematoxylin-eosin stain; original magnifications: A, ×20; B, ×200.)
