<prompt> Answer this question truthfullyWhat are the diagnostic steps for pelvic trauma and what are the possible outcomes of each step?  <response>: <reason> In cases of pelvic trauma, the diagnostic steps involve: 1 performing a retrograde urethrogram if there is blood at the urethral meatus and a high-riding prostate, 2 performing a retrograde cystogram if the previous step is normal, 3 proceeding to ex-lap if the retrograde cystogram shows intraperitoneal extravasation, and 4 inserting a foley catheter if the retrograde cystogram shows extraperitoneal extravasation. 