stage I

Definition of stage I transitional cell cancer of the renal pelvis and ureter
National Cancer Institute

stage I transitional cell cancer of the renal pelvis and ureter

(... tran-ZIH-shuh-nul sel KAN-ser ... REE-nul PEL-vus ... YER-eh-ter)
Cancer has spread from the tissue lining the inside of the renal pelvis or ureter to the connective tissue layer.

Source: NCI Dictionary of Cancer Terms