What is the name of the radiographic examination for demonstrating the pelvicalyceal system using a cystoscope?

The radiographic examination that specifically demonstrates the pelvicalyceal system using a cystoscope is known as a retrograde pyelogram. In this procedure, contrast material is injected directly into the renal pelvis via the ureters using a cystoscope. This allows for detailed imaging of the pelvicalyceal system and urinary tract, facilitating the evaluation of conditions such as obstruction, stones, or tumors.

This procedure is distinct from others such as a pyelogram, which typically refers to imaging of the renal pelvis without the direct intervention of a cystoscope, and an intravenous pyelogram, where contrast is injected intravenously and visualizes the entire urinary system, not just the pelvicalyceal junction. Similarly, a urethrogram focuses on the urethra itself, rather than the upper urinary structures. The retrograde approach provides specific insights into the pelvicalyceal anatomy that are not possible through other methods.