'Stipple sign’ in transitional cell carcinoma of the renal collecting system is best demonstrated by
Intravenous urography
Retrograde pyeloureterography
Radionuclide scan
Ultrasound scan
An intravenous pyelogram, also called an intravenous urogram, is a radiological procedure used to visualize abnormalities of the urinary system, including the kidneys, ureters, and bladder.