OBJECTIVES: We report one case of solitary fibrous tumor of the tunica vaginalis, a benign paratesticularlesion.METHODS: Surgical exploration with intraoperative biopsy and excision of the lesion was undertaken, leaving the testicleand epididymis undamaged.RESULTS: Intraoperative biopsy revealed the presence of fibrous tissue without malignant cellularity. Pathological diagnosis on the surgical specimen was solitary fibroustumor of the tunica vaginalis. The patient remains asymptomaticand disease-free one year after treatment.CONCLUSIONS: Almost all testicular masses are malignant,but in order to avoid a non-indicated orchyectomy, one should be cautious with the finding of a paratesticular lesion of probable benign nature on ultrasound or during surgery.