[Pelvic kystic schwannoma evoking a tumor of the right seminal vesicle].

We present the case of a pelvic schwannoma in a 36 year old man. It was discovered by chance during the medical assessment of a prostatitis. A computed tomography scan and magnetic resonance imaging revealed a 8 centimeters cystic pelvic tumor, closed to the right seminal vesicle. The patient underwent a transrectal ultrasound-guided biopsy, which showed a proliferation of neural peripheric cells with nuclear abnormalities. A tumorectomy was performed by laparotomy. The histological study diagnosed a benign cystic schwannoma. The patient was free of disease 12 months postoperatively.