In a recent fan Q&A, Mark went into more detail about the "blood-related" cancer that he is battling.
"My classification is diffuse large B‑cell lymphoma Stage 4‑A, which means, as I understand it, it’s entered four different parts of my body,” he explained. "I don’t know how exactly they determine the four-part of it, but it’s entered enough parts of my body that I’m Stage 4, which I think is the highest that it goes. So, I’m Stage 4‑A.”
Detailing the tests he’d be taking, Mark said, "Ideally I go in tomorrow and they say, 'Congratulations! Your chemotherapy has worked and you are all done and you’ll never have to think about this cancer again for the rest of your life.’ Even if the cancer’s totally gone from my whole body, they give me three more rounds of chemo just to make sure.”
He also added that his mother previously beat the "exact same” type of cancer that he has, as well as breast cancer twice.
"I’ve been able to talk with her and bond with her quite a bit,” Mark said. "Oddly enough, we have the exact same form of cancer that she had. And she beat it – twice for breast cancer and one for the same cancer that I have."