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(A) Anaplastic large cell lymphoma. H & E stain (×400). (B) Anaplastic large cell lymphoma, CD30 expression (×100). (C) Anaplstic large cell lymphoma, ALK protein (×100). (D) Anaplastic large cell lymphoma, CD99 expression (×100). (E) Anaplastic large cell lymphoma. Higher magnification of CD99 immunostain (×400).
