is_about blood cell Hodgkins lymphoma cancer enzyme enzyme anemia (phenotype) hematological measurement L lactate dehydrogenase measurement true Helen Parkinson Is a quantification of L lactate dehydrodgenase, typically measured in serum, used as a marker of tissue breakdown as LDH is abundant in red blood cells and can function as a marker for hemolysis http://en.wikipedia.org/wiki/Lactate_dehydrogenase