<s>[INST] I just had a cat scan of my aorata path which was ok however a mass showed up on one of my kidneys. i have not had any type of unusal pain At one time i did have a kidney stone. My question is could this showing be kidney stones? thks cal arnecke [/INST] Hi, dairy have gone through your question. I can understand your concern.  You have gone through ct scan, and it suggests mass on kidney.  It can be due to renal cell carcinoma, adenoid or some other mass.  It doesn't indicate stone. You should go for fine needle aspiration cytology or biopsy of that mass.  It will give you exact diagnosis.  Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>