Abstract Hydatid disease of the urogenital system, especially of the retroperitoneum and seminal vesicles, is a very rare condition. We report a case of hydatid disease located in the liver, retrovesical region and seminal vesicle that was diagnosed incidentally while investigating the etiology of syncope. Transabdominal and transrectal ultrasonography revealed hypoecoic multicystic masses which had thin septations and walls in the liver, retrovesical region and seminal vesicle. Abdominal computed tomography examination showed multicystic low attenuation masses in the same region. Pelvic magnetic resonance image findings revealed multiple cystic masses in the retrovesical region and the right seminal vesicle. In conclusion, the diagnosis of hydatid disease should be kept in mind with patients who have cystic lesions in seminal vesicle and retrovesical region.