Background:
In the scenario of blunt trauma with suspected bladder injury, conventional retrograde cystography is the gold standard for accurate diagnosis.
Case description:
The authors report the case of a 54-year-old patient who presented with pelvic and sacral fractures and a ruptured bladder after being hit by a vehicle. A retrograde computed tomography cystogram demonstrated extraperitoneal extravasation of the contrast agent, which traversed violated sacral nerve roots, resulting in contrast entering the subarachnoid space at the left sacral ala predominantly through the left L5 and S1 nerve roots.
Conclusions:
This is the first known report of an accidental myelogram imaging performed through a retrograde cystogram.