Fig. 6. Morphological spectrum of type 1 posterior urethral valve. (A) Severe type showing bilateral valve-like structure, at which cold knife is snagged deeply. (B) Moderate type showing shallow posterolateral folds. (C) Mild type showing subtle posterolateral folds. In contrast to rather thickened lesion in the anterior wall in mild to moderate types, the anterior wall lesion in severe type is thin membrane-like structure. The size of the arrows show the depth of postero-lateral folds. The asterisk indicates verumontanum. Scan this QR code to see the accompanying video, or visit www.icurology.org or https://youtu.be/xtDrhVnQhQA.
