Hi, my grandfather was diagnosed with a rare from of leukemia in late June. Sadly, he passed away at home on October 2nd. He was on hospice and was given morphine and adrophine for comfort. The day before he passed, there was a light green foam that was coming from his mouth. My mother and grandmother both work at our local hospital and we have spoken to hospice and they said they have never seen a green foam, only pink and white. Do you know the cause of the green foam? He went through two intense rounds of chemotherapy in the months before he passed if that makes a difference.