How do you treat extensive stage small cell lung cancer in the very elderly (more than 80 yrs)?

I typically do not go by the chronological age of the patient, but rather their performance status and co-morbid conditions. For patients >80 year old with PS 0-1, I would have no hesitation in using standard carboplatin-etoposide-immunotherapy. For patients with marginal PS, I would use the same dr...