EN
A 10-year-old Silesian stallion was examined for unilateral scrotal swelling. Physical and ultrasound examinations revealed a painless enlarged right testis with a non-homogeneous echogenicity, when compared with the controlateral testis. Grossly, the excised testis was irregularly enlarged (23 × 15 ×15,5 cm) and firm and surgical biopsy revealed that the testicular parenchyma had been replaced by cohesive tissue. Histological examinations showed an apparent non-malicious tumor composed of cells with rippling courses of cytoplasm mixed with a few cells of smooth muscle. Testicular neurofibroma tumor was diagnosed on the basis of these findings.