Mayo is supposed to be good but sometimes if you don't ask you don't get. So definitely ask everything possible. It's next to impossible to predict spread its such and individual thing. I know lungs is a big and scary one. ( once it hits there it is very hard to treat). But a friend who passed away early this year ended up with it gone from her mouth and neck but they found it in her vertebrae and ribs and then from there it became uncontrollable - another had spread to her groin and then everywhere else. Your lymph nodes service your entire body - the lymphatic system runs parallel to your circulatory system. So if it's not caught with fairly early nodal involvement it can become hard to catch (hence chemo as a rads chaser as it is systemic - and though it doesn't "kill" scc perse it can nuke stray cells that may have traveled outside the radiation field, and it sensitized this that are in the radiation field) - I'm not trying to scare you it's just a heads up. Education is your best weapon. And do wha you can to create and maintain a strong immune system.. Hugs!