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Histopathology. A, Epidermal hyperplasia and a dense dermal population of atypical lymphocytes with focal epidermotropism. B, Epidermotropism and Pautrier microabscesses at higher power. C, CD4 immunostain highlighting most of the atypical lymphoid infiltrate. D, CD8 immunostain highlighting few reactive T-lymphocytes (hematoxylin-eosin stain; original magnification: A, ×40; B, ×600; C, D, ×100).
