“…a Preoperative IVP shows a small capacity bladder due to interstitial cystitis, b IVP after augmentation using the sigmoid, c The urine-filled loop caused disturbances to the patient even in the absence of outflow obstruction (d). formed by some authors [17], while others use it in 20-50% of cases [6,10,18], seldom [11], or in male patients over 45 years old [7,8], In these patients voiding difficul ties are due to dyssynergia between the enteric and the bladder neck urethral segment, which is generally com pletely normal. When a tendency to cystoplasty dilatation or residual urine over 200 ml is present, we favor initial medical treatment in order to reduce outflow tract resis tance, and in some cases we observed voiding improve ment and reduction of residual urine ( fig.…”