Hiya I had the same in July had CT scan on my lungs after waiting over 12 month for an urgent appointment got a call two days later to go back and have the dye in and got told I had a 5.4 cm tumour on my left kidney I hadn’t had any symptoms apart from back ache when I used to go shopping or stood ironing for hours,they discussed my options and I had the surgery on the 7th August which I had partial removal they did say when they went in if they needed to take the full kidney they would do but I’m so glad it’s over with they also found a nodule on my lung and said they didn’t know if it was linked to the kidney although they told me the kidney one looked contained,I hope all goes well for you and you get it sorted asap x