Sperm granuloma in a buck

A 7-month, Saanen buck was presented for evaluation after failing to produce sperm during 2 attempts. Physical examination revealed a firm and smooth mass, dorsal to each testis, with no other abnormalities. Semen sample obtained with an electroejaculator had very small number of nonmotile sperm. Ultrasonographic examination revealed a predominantly hypoechoic mass on the testis’ dorsal aspect and a normal echogenic pattern of the testicular parenchyma. Future breeding potential of the buck was deemed to be poor; therefore, the buck was castrated. Epididymal heads were occupied by sperm granuloma and the remainder of the testes was normal.