Transperineal vesiculodeferentography under ultrasound control: first experiences.

Vesiculodeferentography (VDG) plays an important role in diagnosing male infertility and staging of prostatic cancer; the techniques of performing the examination are, today, well codified: 1) retrograde, by endoscopic cannulation of ejaculatory ducts; 2) anterograde, by cannulation of the deferent duct surgically prepared at the scrotum. In order to avoid the difficulties of the first method and the risks in the second (like stenosis and fibrosis of the deferent duct) we propose a new simple and safe method based on the direct transperineal puncture of the seminal vesicle under direct echographic control with a transrectal probe. We have studied 16 patients, mainly in order to stage prostatic cancer; the procedure was easy to perform, well tolerated and without consequences at seminal level. It required only 30 minutes, without anaesthesia and with a very low cost. The method permits a clear visualisation of anatomical structures and of possible pathologies with particular reference to vesicular invasion by a prostatic cancer.