Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Transitional Cell Cancer of the Renal Pelvis and Ureter ?
    ### Response:
    Key Points
                    - Transitional cell cancer of the renal pelvis and ureter is a disease in which malignant (cancer) cells form in the renal pelvis and ureter.    -  Misuse of certain pain medicines can affect the risk of transitional cell cancer of the renal pelvis and ureter.
    