ck anyone?

HI evreyone, although  I am not new to sarcoma this is my first post here.

My husband (29) is fighting osteosarcoma for seven years now.

Recently 3 lessions were found in his lungs and he got ck (cyberknife)

which seem to work. Two months after, lessions had been shrinking,

Now I am wondering: whats next?

My oncolog doesnt seem to know much about cyberknife

and even our ck doc is kind of new to osteosarcoma,

Is there someone here who has been through ck to the lungs?

Can you please share your story?