Haematuria following radiotherapy for bladder tumours.  An approach to therapy. 
Unrestrainable haematurias after supervoltage therapy of bladder tumours are a serious complication for the treatment.  Excellent results were obtained by radical transurethral resection of the pathologically modified bladder mucosa.  There is no bleeding and new mucosa with a particular appearance replaces the resected tissue.  The histological findings and the results of the treatment confirm that the only cause of these haematurias is the presence of large newly formed vascular "lakes".