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Representative immunohistochemical features of HDAC1 (left), HDAC2 (middle), and EZH2 (right) in PTCL-NOS, ALCL, NK/T and AITL. All images were captured at ×200 and ×400 magnifications. HDAC, histone deacetylase; EZH2, enhancer of zeste homolog 2; PTCL-NOS, peripheral T cell lymphoma not otherwise specified; ALCL, anaplastic large cell lymphoma; NK/T, natural killer/T-cell; AITL, angioimmunoblastic T-cell lymphoma.
