Cysts of the prostate, seminal vesicles and diverticulum of the ejaculatory ducts.

The close proximity of the prostate, vas deferens, seminal vesicles and ejaculatory ducts are a diagnostic challenge to the cysts located in that region. Three patients with diverticulum of the ejaculatory ducts, 2 with prostate cysts and 1 patient with seminal vesicle cyst are presented. Transrectal ultrasound, computed tomography and magnetic resonance imaging together with aspiration of the cyst establish diagnosis and probably prevent unnecessary exploration.