James had his bone marrow test yesterday. He was incredible bouncy just before hand, but got knocked out pretty quickly by the anaesthetic!
It was really nice that there was another family sharing the room with us. Their daughter was having her last check-up bone marrow test five years after finishing her chemo for leukemia! Her parents told us that they also found "funny cells" in her bone marrow a few times during her treatment, but that they gave extra treatment and they went away (although it prolonged the treatment)... That was encouraging.
James's pediatrician explained a bit more: in the last test they found some blasts - abnormal cells - in his bone marrow. As I understand, they can't necessarily tell from that whether they're cancerous or not - but they regard them as a relapse if they reach a certain proportion (above 3%) of the bone marrow. They're wanting to investigate more to work out what they are, and this bone marrow biopsy will enable them to to a lot more detailed tests.
James's white blood cell counts and platelets were normal, which seems to indicate that this is probably not a full-blown relapse (they would expect them to be affected if it was).
We're going to see the Prof next week Thursday to hear what they find, but we'll probably hear before that if there's a serious problem ...