Squamous Cell Carcinoma in a Calyceal Diverticulum Detected by Percutaneous Nephroscopic Biopsy

Figure 2

Retrograde pyelogram image, showing a duplex collecting system in the right kidney and calyceal diverticulum connected to the upper renal calyx. Defect sign of retrograde pyelogram, caused by filling of the diverticulum by the soft protein matrix, is observable. A percutaneous nephrostomy tube in the diverticulum was placed prior to ECIRS to remove the contents completely.