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