case_images: PMC4532051_01
case_images: Microphotograph of H&E section shows diffuse infiltration of atypical large lymphoid cells suggestive of poorly differentiated plasmacytic nature. Reminiscence of seminiferous tubular structure is also noted in the left lower part of the figure.
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case_images: PMC4532051_01_kjim-9-1-39-7f1.jpg
case_images: f1-kjim-9-1-39-7
case_images: Testicular needle biopsy showed diffuse infiltration of atypical large lymphoid cells with feature of poorly differentiated plasma cell nature between seminiferous tubules and inside of them as well (Fig. 1).
case_images: Microphotograph of immunohistochemical stain for L26(CD20) shows positive findings on scattered neoplastic plasmacytoid cells.
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case_images: PMC4532051_01_kjim-9-1-39-7f2.jpg
case_images: f2-kjim-9-1-39-7
case_images: Immunohistochemical studies revealed positivity for L26 (CD20) and Ig k predominance on infiltrating neoplastic plasmacytoid cells (Fig. 2).