Diane was feeling tired and had a rash. A common scenario, though there was something subliminally worrisome that prompted me to check her blood count. Her hematocrit was 22, and the white-cell count was 4.3 with some metamyelocytes and unusual white cells. I wanted it to be viral, trying to deny what was staring me in the face. Perhaps in a repeated count it would disappear. I called Diane and told her it might be more serious than I had initially thought — that the test needed to be repeated and that if she felt worse, we might have to . . .