Need advice regarding blood results

Hello, my name is Jessica and I am new to this. I have a cat named Chunky and he is my furbaby!! A couple of weeks ago, bloodwork was taken during a routine wellness visit. Chunkys bloodwork came back with elevated calcium and a low white blood cell count. We went to an oncologist yesterday and we did bloodwork called a malignancy profile and we did a CBC. I was wondering if anyone has every dealt with a similar situation and could give any advice. I am pretty worried and just hoping for the best. Chunky is eating, drinking and playing as he normally does. Any info is greatly appreciated!!

how old is Chunky?