Prostatic carcinoma shrunk after intraprostatic injection of botulinum toxin.

I performed a transperineal intraprostatic injection of botulinum toxin type A (BT-A) with a dosage of 1000 units of DysportTM/ Ipsen diluted in 0.5% adrenaline solution of water for injection, in a single injection directly between the two apparent hypoechoic areas under transrectal ultrasound (TRUS) guidance, in a total volume of 7 cm3, in order to relieve his ongoing prostatic obstruction. (1-9)