Transurethral hyperthermia for relieving obstructive voiding symptoms in patients with hormone refractory prostate cancer.

Transurethral thermal treatment has been used to relieve obstructive voiding symptoms in 10 patients with prostate cancer. All patients failed previous endocrine treatment for the relief of obstructing urinary symptoms. Temperature ranging from 46 degrees C to 47 degrees C was applied transurethrally using Thermex II thermal system. Treatment was given in a single session for a duration of 180 minutes on an outpatient basis without sedation. Mean duration of follow-up was 8.5 months (range 4-13 months). Maximal urine flow rate, post-voiding residual volumes and changes in subjective symptoms were used to assess treatment response. Removal of an indwelling catheter was possible in all 3 patients with chronic retention. Urinary infection (2 patients) and temporary retention (3 patients) were the only complications recorded. The preliminary results suggest that transurethral hyperthermia is a well-tolerated, safe and effective procedure for obstructive voiding symptoms in patients with hormone refractory prostate cancer. Longer follow-up and a larger group of patients is required to assess this alternative modality.