Recently admitted him to a memory care facility...had a minor stroke Sept 2016. We just want him to be as comfortable as possible. Should we attempt to find out type of bone cancer and stage? Would that be invasive to find out. He has continued pain on his right knee and both legs and feet are very swollen. Ar there different types of pain relief for different types of bone cancer. I read cancer in elderly is very slow progression...is that true for bone cancer?