PMC8072450_01
mBT tissue stained with H&E. (A) Neoplatic cells resembling invasive urothelial carcinoma exhibit high mitotic activity (H&E, x10 magnification). (B) Perineural (head arrow) infiltration (x20 magnification). (C) Linfovascular invasion (x40 magnification). (D) Testis showing tubular atrophy and Leydig cells hyperplasia (x10 magnification).
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Histological examination and immunohistochemistry showed morphological features of malignant BT of epididymis ( Figures 1A, B ).