Axial CT images show mild enlargement of the right kidney, perinephric fat stranding and dilated right renal pelvis, right ureter to the right ureterovesical junction (UVJ).
- UVJ obstruction (tumor, stricture, nonopaque calculus)
- Recently passed ureteric calculus
- Renal trauma
- Acute pyelonephritis (usually no dilatation of collecting system)
- Renal vein thrombosis (usually no dilatation of collecting system)
Our case -- passed ureteric stone, seen at the base of the urinary bladder. Make sure to scan the entire length of the urethra, or ask the patient if there has been any sudden relief of symptoms.