Janice, sorry to hear your cat's diagnosis. I never had much reply about the spots in my cats lungs his abdominal tumor was the main concern. I got a reply from Art S. who had success with the Essiac tea but added chapparel and echinacea tea to the mixture and it cured his cat.
His reply should be in this thread as well as how he mixed it. Humans with lung cancer have had results with flax hull lignans in yogurt, cottage cheese, etc. Don't know if it works for animals.