question: I had skin center to my left leg on 2007 in 2013 I started having seizures and found a lesion on my brain had a pet scan done and found lymph nodes with cancer in short tumor on brain removed and treated with gamma knife and lymph nodes removed. K so have cancer how long should I wait to do some kind of treatment  surgery was done jan 20 and I have no plans except wait and do pet scan end  of February