Gina,
The renal pelvis and ureter comprise the "upper urinary tract". The upper tract can host the same cancers as the bladder. Additionally, other renal (kidney) cancers can exist independently. Been there, am there. The upper tract can also be the source of recurring bladder tumors.
Suspicious growths of the upper tract can be biopsied via a ureteroscopy.
Your doc and/or care team are the ones to answer specific questions regarding YOUR care and treatment. Always ask for answers to your questions. Guessing never resolves the questions.
Best
Jack
