Eight years after undergoing treatment for a Hodgkin's disease recurrence, Kenneth Woo was just about to graduate from his oncologist's care at MD Anderson.

Then, the unthinkable happened: he was diagnosed with acute myeloid leukemia (AML) after suffering from fatigue and dizziness that he'd thought was anemia.

"I'll never forget the sad look on my doctor's face when he told me I probably had leukemia," Kenneth...