My husband has had fluid drained from his lungs several times , the last time they said it had blood in the fluid . He has a number of problems and had his tongue removed about 4 years ago , he s on a peg tube & Can t eat or drink or talk . He s lost a lot of weight. Our primary Dr. Told us last week his cancer has come back in the floor of his mouth . We see his cancer surgeon in 2 days . I was concerned about the blood in the fluid they drained . He has agent orange , & smoked years ago , He is 76 years old . I hope this small amount of information will help . Thank you. He s a Veitnam Veteran almost 10 years .