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LDH v. CEA blood tests- Dr. Joe, can you respond to this to?


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LDH is lactate dehydrogenase, an enzyme present in virtually every cell in the body. It is completely non-specific and any kind of tissue injury can cause it to go up. It can be elevated in cancer, true, but much more useful in hematologic cancers (lymphoma, leukemia). CEA is more specific to cancer but often also worthless because many cancers don't express it.

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