Features of sperm sample of an affected male:
(1) low volume ejaculate
(2) low seminal pH
(3) marked oligozoospermia or azoospermia
Transrectal ultrasonography:
(1) dilated seminal vesicle with diameter > 1.5 cm
(2) midline prostatic or retroprostatic cysts (may be causing the duct obstruction)
(3) ejaculatory duct cyst
(4) calcifications in ejaculatory duct
(5) ejaculatory duct dilatation
The obstructed lumen of the ejaculatory duct may be seen on sagittal ultrasound images as a hypoechoic tubular structure entering the urethra at the level of the verumontanum.
Features of fluid aspirated from a dilated seminal vesicle:
(1) high concentration of mobile sperm
(2) normal spermatozoa morphology
