Patient with horseshoe kidney. Right sided hydronephrosis and hydroureter with perinephric and periureteric fat stranding. Bilateral calcific densities near the vesicoureteric junctions. One right calcific density is completely surrounded by a soft tissue density rim consistent with a ureteric stone surrounded by an edematous ureter wall (soft tissue rim sign). The other calcific densities are phleboliths that are surrounded by fat instead of soft tissue.