PMC9282813_01
Postinfectious ureterovertebral fistula. (a) IR nephrogram (left to right, during injection; red asterisk demarcates the right renal pelvis; yellow arrow demarcates the right ureter) obtained during nephrostomy exchange demonstrating extravasation of contrast and opacification of the abnormal connections to the psoas phlegmon (red arrowhead) and adjacent osteomyelitic L3 vertebral body (red arrow) consistent with ureterovertebral fistula. Sagittal CT (b) and T2-weighted MRI (c) demonstrating extensive osseous destruction at L3. (d) Axial T2-weighted MRI images demonstrating continuity of the right ureter/renal pelvis containing her ureteral stent (red arrow) and the cystic space in the L3 vertebral body.
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F1
A nephroureterogram with stent exchange demonstrated a worsening ureteropsoas fistula with contrast extravasation into the osteomyelitic cavity within the L3 body (i.e., progression to ureterovertebral fistula) [Figure 1].