I am very glad to hear that you are getting neoadjuvant chemotherapy. I really do hope the resection is complete, and the chemotherapy works.

Regarding "holding on long enough" -- something that there has been shoddy but interesting evidence for over a number of years in dragging yourself further to the right of a Kaplan-Meier plot is dietary modification. As you probably know, one of the hallmarks of cancer is metabolic dysregulation [1] -- specifically a shift towards "anaerobic" glycolysis, that is, the increased uptake of glucose and an increase in the proportion of which ends up as its ultimate metabolic fate as lactate rather than entering the TCA cycle as pyruvate and being oxidised. Some thing that has been explored in the past is providing the organism with ketones as a primary fuel source (which enter the TCA cycle directly as either beta-hydroxybutyrate or acetoacetate) and do not get transported through the glut glucose transporters: in non-cancerous cells with some degree metabolic flexibility there is significant scope for generating other needed metabolites from the TCA cycle and a series of beautiful pathways to let that process happen. As a result, there are a series of papers that indicate that a purely ketone-based diet (exogeneous or endogenous) may be associated with an increase in life expectancy [2, 3, 4; or google scholar GS1] as -- the narrative goes -- cancer cells can't utilise the alternative fuel source as effectively. In mice, with a well controlled tumour xenograft, this has shown to extend survival, fairly significantly.

However, take this with a large grain of salt: there is some evidence that ketone utilisation might be associated with "stemmness" and baddness in general [5, 6] which (and herein starts a "I am hypothesising" warning) may be due to a selection pressure for metabolic flexibility and the return to a more fetal phenotype. The diets are also very difficult to adhere to in patients. These diets are just starting to be assessed properly, in people, in RCTs (e.g. [7]), but I can't find any evidence of a trial in lung cancer patients without a background of smoking specifically.

The most recent major review on the topic I can easily find [8] does seem to hint quite strongly that it might be worth considering, and there is some evidence that it potentiates tumours to other chemotherapies. If I were in your unfortunate position, I would personally discuss the concept with the oncologist in charge of my care – the basic idea "makes sense" to me, at least.

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[1] https://www.sciencedirect.com/science/article/pii/S009286741... or https://sci-hub.st/https://www.sciencedirect.com/science/art...

[2] https://onlinelibrary.wiley.com/doi/abs/10.1002/ijc.28809 or https://sci-hub.st/https://onlinelibrary.wiley.com/doi/pdfdi...

[3] https://nutritionandmetabolism.biomedcentral.com/articles/10... or https://sci-hub.st/10.1186/1743-7075-4-5

[GS1] https://scholar.google.co.uk/scholar?hl=da&as_sdt=0%2C5&q=ke...

[4] https://link.springer.com/article/10.1007/s12032-017-0930-5 or https://sci-hub.st/https://link.springer.com/article/10.1007...

[5] https://www.tandfonline.com/doi/abs/10.4161/cc.10.8.15330 or https://sci-hub.st/10.4161/cc.10.8.15330

[6] https://www.tandfonline.com/doi/abs/10.4161/cc.9.17.12731 or https://sci-hub.st/10.4161/cc.9.17.12731

[7] https://www.mdpi.com/2072-6643/10/9/1187

[8] https://www.sciencedirect.com/science/article/pii/S221287781...