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Histologic examination of the forearm biopsy. A and B, Lymphohistiocytic inflammatory infiltrate with formation of epitheloid giant cell granuloma. C-F, Lichenoid lymphohistiocytic inflammatory infiltrate, exocytosis of lymphocytes. (A-F, Hematoxylin-eosin stain; original magnifications: A, ×25; B-F, ×100. Immunohistochemistry: D, anti-CD3 staining in red; E, anti-CD4 staining in red; F, anti-CD8 staining in red.)
