This patient had pain in the right lumbar region. ultrasound of the abdomen showed hydronephrosis of the right kidney with a moderately large calculus (14mm.) at the right Pelvi-ureteric junction (arrows). Such calculi cause partial obstruction of the renal pelvis and may cause severe ureteric colic. Ultrasound images of pelvi-ureteric junction calculus, were taken with a Toshiba Nemio-XG ultrasound machine. (Synonyms: PUJ calculus or UPJ calculus or UPJ stones).
