I'll chime in since I'm an actual Clinical Laboratory Scientist (Med Tech, aka the guys who run these tests).
It's fake, you really wouldn't get the diagnosis of Leukemia from a General Chemistry Workup, and even then some of these tests wouldn't be run in the general chemistry, they'd be from specials. Instead you'd see a workup from the hematology department with cell counts, and even then you would just get a "Leukemia: Positive". You'd get a description of what the cells look like, their counts, and possible indicators. As far as I know (different labs use different layouts/machines/procedures) there is no such thing as a straight up positive leukemia (it actually makes no sense since there are differing varieties/causes).
Edit: Also you can see from the notes of what certain values mean, this is a workup of a guy with heart problems, it might be a guy who is on his way to a heart attack, but its hard to tell without a troponin or other markers.