Transurethral microwave therapy: patient selection and outcome.

Abstract

Forty-one patients with benign prostatic disease awaiting transurethral resection of the prostate were offered transurethral microwave therapy as an alternative. Pre-operative assessment consisted of symptom scores, prostate-specific antigen levels, flow rates and urinary tract ultrasound with residual urine estimation. Patients were reassessed 6 weeks, 3 months and 6 months after microwave treatment. Twenty-three patients had a successful outcome and 18 an unsuccessful outcome to treatment. Fifteen of the 18 with an unsuccessful outcome could have been predicted by the presence of one or more of the following pretreatment features: glands over 50 g (10 patients), the presence of a median lobe (5 patients), high residual urine (6 patients), a history of recurrent urinary infection (2 patients) and coexisting neurological disorders such as parkinsonism (1 patient) and CVA (1 patient). Three failures had none of these criteria present and could not have been predicted from their pretreatment assessment. Transurethral microwave therapy produces subjective and objective improvements in appropriately selected patients. Patients with large glands or decompensated bladders fail to benefit and should continue to be treated by conventional surgery.