retrograde ureterogram
Imaging study using contrast dye injected through a cystoscope to visualize the ureter and identify obstructions.
Full Definition
A retrograde ureterogram is a specialized radiographic procedure performed during cystoscopy to evaluate ureteral anatomy and detect abnormalities such as strictures, stones, or tumors. Contrast material is injected in a retrograde fashion from the bladder up into the ureter through a catheter placed at the ureteral orifice. This technique provides detailed visualization of the ureteral lumen and surrounding structures, complementing other imaging modalities like CT urography or intravenous pyelography. The procedure is particularly useful when antegrade imaging is contraindicated or when precise delineation of ureteral pathology is required for surgical planning.
Usage
Usage note: Distinguish from retrograde pyelogram, which specifically images the renal pelvis.
In Context
- "Retrograde ureterogram revealed a complete ureteral obstruction at the pelvic brim." — Radiology report
- "The surgeon performed a retrograde ureterogram to map the anatomy before reconstruction." — Operative report