Regarding the lung biopsy... These types of biopsies are done for all sorts of reasons. (And there might even be different approaches.)
Since your mom is consenting so *some* treatment, maybe you can try to talk her thru her reasons for refusing this particular DIAGNOSTIC tool. Why allow MRI's, scans for diagnosis and agree to chemo and radiation but NOT a lung biopsy?
I had lung biopsy back in 1998. It was done as out-patient using a lavage process. Pretty Easy-Peasy. For all the scans, preps, proceedures, and treatment I had with my cancer, the lung biopsy was *by far* the easiest.
Your mom may be making decisions based on faulty understanding and expectations. I'm going thru this with my dad. In his mind, he builds up the simplist of procedures into future catastrophic events.
With my mom, she was hospitalized a few years ago. She consented to treatment in the hospital but not any tubes or devices hooked up to her. I don't know if my siblings ever convinced her that the IV tube for fluids was simply for that: fluids. In her mind, she equated IV Fluids with 'Life-Support.' In a way, she was right. But not in the typical way the term 'Life Support' is used in common medical terminology.
I think the problem lies in the older generations view of hospitals, medicine and aging in general. They remember how it was back in the 40's and 50's. Also, the WT does them no favors when it comes to trusting/distrusting non-jws, doctors (ie: blood transfusions), and technology.
-Aude.