Aunt has lung cancer, having chemo, rushed back to hospital throwing up blood. ive been told good sign, means collapsed lung re-inflating. any advise?

Who said this?: If the doctor treating her right now said this was a good sign, then it likely is. Only the doc who's treating her for this now can give a decent idea. Unless the doc has communicated this to another doc or family member. Maybe this sounds like a reasonable answer to vomiting blood to another doc, but it does not make a lot of sense to me. But, sometimes we don't remember all we were told exactly