Role of ultrasound-guided percutaneous antegrade pyelography in malignant obstructive uropathy: A Nigerian experience.

Ultrasound-guided percutaneous nephrostomy of the renal pelvis is a technique that is widely acceptable especially when contrast media is introduced in the procedure of antegrade pyelography. It is a relatively safe procedure that effectively improves renal function in obstructed kidneys. It can be performed in most cases as an alternative to retrograde pyelography.