Figure 1

Histological and immunohistochemical findings. (a) The testicular parenchyma shows no evidence of lymphomatous involvement (hematoxylin-eosin, original magnification ×50). (b-c) Residual epididymal tubules are surrounded by a dense cellular infiltrate with a prevalent follicular architecture (hematoxylin-eosin, original magnification ×100 and ×630, respectively). The neoplastic cells strongly express CD20 (d) and CD10 (e) but are bcl-2 negative (f) (original magnification ×250).