Hello, I have a couple of questions. First of all I want to state a few facts about my father's diagnosis. He was diagnosed with a stage 4 metastatic Lung cancer 2 months ago. He was hospitalized for 12 days and went through CCU and ICU. Doctors did the fluid drainage from his lungs while he was in ICU. We did 2 pathologies.

First one said it's an "Undifferentiated carcinoma" which is I suppose the kind which hasn't spread to other organs. His doctor confirmed that two lungs are involved, and it's in stage 4.

Second pathology stated "Cellular evidence of neoplastic epithelial cells with extensive tumour necrosis compatible with malignant epithelial neoplasm."

I searched the net and found out that NSCLC metastatic stage 4 lung cancer has to involve blood,brain,liver blah,blah blah! In dad's case it's just in lungs. He has a heart disease too. We went to 2 oncologists. First one said we have to get in action as soon as possible,without taking into account dad's heart problem. Second one told us to wait for 2 weeks,then do a cardiography of his heart and visit him again and see if we can go through chemotherapy. I asked him if we can start with low doses or even radiotherapy (because of heart disease) he replied with "ONLY CHEMO" answer.

My question is this: If it's just in lungs, why don't the doctors remove the cells by surgery or start the treatment with low doses of radiotherapy or chemo?! I know the size of tumour and the level they're involved with lymph nodes are also an important factor for diagnosing a stage-4 carcinoma,but there must be a way out of this.

My second question: Are diets and cancer treating drugs helpful for preventing the cells to improve? (In case if clinical trial or comfort care are the only solutions!!)