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Histopathological findings. Histopathological findings from the biopsy specimens revealed the following. Diffuse and atypical large cells were revealed by hematoxylin and eosin staining ((a) and (b)). Immunohistochemical staining was positive for anti-LCA (CD45) and anti-L26 antibodies and negative for anti-CD3, anti-CD30, and anti-cytokeratin AE1/AE3 antibodies; Ki-67 staining was positive in 53% of cells ((c)–(h)).
