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Two cases of B-cell non-Hodgkin lymphoma showing immunohistochemical staining for hepatitis C virus nonstructural 3 protein. Avidin-biotin peroxidase complex method. A, Strong cytoplasmic staining in the lymphoid cells. Original magnification 400 ×. B, Diffuse cytoplasmic staining in the lymphoid cells. Original magnification 400 ×.
