retrograde pyelography
Pronunciation: py-EL-og-rah-fee
Imaging procedure using contrast injection through the ureter to visualize the upper urinary tract collecting system.
Full Definition
Retrograde pyelography is a diagnostic imaging procedure that involves injection of contrast material directly into the ureter and renal pelvis through a catheter placed during cystoscopy. This technique provides detailed visualization of the upper urinary tract collecting system, including the renal pelvis, calyces, and ureter. In urologic oncology, retrograde pyelography is particularly valuable for evaluating ureteral and upper tract urothelial carcinomas, assessing the extent of disease, and planning surgical approaches. The procedure can identify filling defects, strictures, and anatomical abnormalities that may not be clearly visible on standard imaging. It is often performed in conjunction with ureteroscopy for both diagnostic and therapeutic purposes.
Usage
Usage note: Note the single 'r' in pyelography; commonly misspelled as 'pyelorrhaphy'.
In Context
- "Retrograde pyelography demonstrated a filling defect in the left renal pelvis consistent with upper tract urothelial carcinoma." — Radiology report
- "The urologist performed retrograde pyelography to better delineate the ureteral anatomy before nephroureterectomy." — Operative planning note