Historic test: Matthew, the LDH isoenzyme test is ancient history, almost never ordered nowadays. And your LDH is normal. The old 1-2 ratio is an antique screen for a heart attack, and it's neither sensitive nor specific. I know you're obsessing over the idea that you have lymphoma, and a few websites suggest this as a screening test -- but it's not. Focus on building a life for yourself.
Answered 8/24/2017
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