Figure 11a. Distortion or obscuration of the UGD fat plane. (a) CT scan of a patient with a type II urethral injury shows partial absence of the left UGD fat plane (arrow) with a normal right fat plane. (b) CT scan of another patient shows a fracture of the right ischiopubic ramus (arrow) with preservation of the contour and surrounding fat planes of the UGD (arrowheads).