Radiology ‘Stipple sign’ in transitional cell carcinoma of the renal collecting system is best demonstrated by A Intravenous urography B Retrograde pyeloureterography C Radionuclide scan D Ultrasound scan 💡 Explanation 'Stipple sign’ in transitional cell carcinoma of the renal collecting system is best demonstrated by ✓ Correct Answer: A. Intravenous urography