Looking for some guidance. My Dad was diagnosed with Stage 4 lung cancer in June. He is currently undertaking immunotherapy, four sessions to date. He has a preexisting issue with a nerve in his back that has caused him pain for which he has received treatment. Before the cancer diagnosis he still had mild back pain.
Now the pain in his back has worsened to the extent that it has brought him to tears, not something I have ever witnessed. My Dad is the kind of person that shrugs of any distress so this has made us very concerned. He has been proscribed increasing doses of morphine which are having less and less effect.
My question is : can the pain be attributed to his advancing cancer or is it the preexisting condition?
Challenging to answer I know, but I would appreciate any guidance or places to look for further info.
Thanks in advance.