The patient, aged 28 years, with no past history of interest, came to the urology department for a testicular nodule that he had detected three months ago and which, according to the patient, had not increased in size. On examination, a hard, mobile and painful nodule was observed on palpation at the level of the right spermatic cord. Tumour markers and hormone levels were normal.
Ultrasound imaging showed an oval, hypoechoic image of mixed echogenicity, with a maximum longitudinal axis of 2.8 cm, which appeared to be related to the spermatic cord. The MRI study shows a low signal T2 image at the level of the right spermatic cord, indicating that it is a tissue with low water content, possibly fibrous or scar tissue, with a maximum diameter of 43 mm.

With the diagnosis of a right paratesticular tumour, it was surgically excised and the tumour was separated from the vas deferens without difficulty. The patient is currently asymptomatic and has been treated without incident.
Macroscopic examination of the specimen revealed a rounded formation of brownish colour and elastic consistency, well delimited, with a maximum diameter of 5 cm, with a whitish, homogeneous surface with a fibrous appearance when cut. Microscopic examination revealed a well-circumscribed lesion consisting of cells with extensive eosinophilic cytoplasm with the presence of transverse striations in some of them, immersed in a fibroblastic stroma, with occasional vacuolated cells and multinucleated cells, with no mitotic activity. In the immunohistochemical study, the neoplastic cells showed intense and generalised expression of desmin and vimentin, and focal expression of specific smooth muscle actin (Master Diagnostic. Granada. Spain).

