Quantitative changes in two serum anti-proteases in several types of adult leukemia are described. High anti-chymotrypsin and low anti-rennin concentrations were observed in the acute leukemias while the reverse was found in chronic forms of the disease. The relationship between the enzyme inhibitors and disease activity in leukemia is similar to that reported in cancer patients.

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© 1951 by American Society of Hematology, Inc.
1951
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