Male pelvis rule11 : Ureteric dilatation

1-The most common cause is ureteric stones.

2-The most important cause is neoplastic obstruction by transitional cell carcinoma while squamous cell carcinoma and metastases are less common in this situation.

3-Ureteric obstruction could be unilateral or bilateral.

4-Causes of bilateral ureteric dilatation:

-Cancer urinary bladder.

-Bladder outlet obstruction.

-Prune belly syndrome.

-Diabetes insipidus.

-Primary mega ureter and reflux.

5-Causes of unilateral dilatation:

-Primary mega ureter and vesicoureteric reflux.

Dilated calyces(c) and pelvis(p) with distended infundibulum (arrow)

Transrectal ultrasound revealed a stone in the distal ureter.

Close up image of the previous case