PMC9807342_01
Abdominal CT findings. A huge prostate mass (a) with a volume of 220 mL extending to the left retroperitoneum (b).
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Abdominal CT revealed a huge prostate mass (Fig. 1a) with a volume of 220 mL extending to the left retroperitoneum (Fig. 1b).
Histopathological findings. A diffuse proliferation of large lymphoid cells was observed using hematoxylin and eosin staining (a). Immunohistochemistry showed positive staining using CD20 (b). The Ki-67 proliferation index was more than 80% (c). All bars indicate 50 mum.
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The patient underwent prostate biopsy 3 days after the first visit, and was diagnosed with DLBCL based on the following histopathological findings: a diffuse proliferation of large lymphoid cells was observed using hematoxylin and eosin staining (Fig. 2a), and immunohistochemistry showed positive staining for CD20 (Fig. 2b). The Ki-67 proliferation index was more than 80% (Fig. 2c).