Wk 3, Case 2 - Supplemental Case

DIAGNOSIS: Ureteropelvic Junction (UPJ) Obstruction

EXAM: Nuclear Medicine Renal Lasix Scan

INDICATION: 62-day-old with hydronephrosis

TECHNIQUE: Nuclear medicine renal flow and function study was performed. 1.04 mCi of Tc-99m MAG-3 was administered intravenously and posterior blood flow imaging of the kidneys was performed. Serial posterior images were then obtained up to 40 minutes. 1.1 mg of Lasix was administered intravenously at 20 minutes. Quantification of renal flow and function before and after Lasix was performed.

SPLIT RENAL FUNCTION:

Left: 74%

Right: 26%

TIME TO PEAK ACTIVITY:

Left: 6 minutes

Right: 1 minutes

CLEARANCE HALF-TIME:

Left Kidney: 3 minutes post-Lasix

Right Kidney: Not obtained at 20 minutes post-Lasix

FINDINGS:

Prompt left renal perfusion and function. Prominence of the collecting system without obstruction.

Abnormal right renal function with a dilated collecting system. No discernible clearance at 20 minutes post Lasix.

IMPRESSIONS:

Poorly functioning and hydronephrotic right kidney with UPJ obstruction.
Left pelvicaliectasis without obstruction.