As far as I know, there shouldn't have been any agent orange issues involved. But, a couple years back, our son was having serious problems and the docs gave him a loose diagnosis of Hodgkins Lymphoma. They just said his symptoms weren't clear enough to do much about, back then. So, they sat back and watched to see what happened. He had to have his spleen removed, then had other problems, before he got severe and wasn't functioning well, this spring. That's when they FINALLY found it and said it was non-hodgkins and gave some other specifics, which gave me what I needed to identify what stage he was in. They started him on chemo almost instantly. At one point, they went back in to draw more bone marrow fluids for testing and none was found, so they had to take a piece of bone for the tests.
He's finally through with the chemo, but still has to take some other meds for a few more months, as his body winds down from the side effects of the chemo.