If clinically suspected look very carefully for a ureteric stone
Other investigations
IVU or CT-KUB can be used to determine the position of a stone and the degree of obstruction
If these are contraindicated then ultrasound can be used to determine the presence of renal outflow tract obstruction
Ureteric stones (calculi) are often seen on an abdominal X-ray performed as a 'control' study for an IVU. This control image is known as a Kidneys-Ureters-Bladder image (KUB).
As with renal stones approximately 90% are visible.
Ureteric stones originate as renal stones. If a renal stone migrates into a ureter it may cause renal outflow tract obstruction, which manifests clinically with severe ipsilateral flank/loin/groin pain, usually with haematuria.
