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  • Title: The effect of L-asparaginase of plasma coagulation factors in acute lymphoblastic leukemia.
    Author: Ramsay NK, Coccia PF, Krivit W, Nesbit ME, Edson JR.
    Journal: Cancer; 1977 Oct; 40(4):1398-401. PubMed ID: 269003.
    Abstract:
    Serial coagulation studies were performed in 26 pediatric patients with acute lymphoblastic leukemia during initial induction therapy with vincristine, prednisone, and L-asparaginase. Prolongation of screening coagulation tests was frequent: prothrombin time (in 16 of 26 patients), partial thromboplastin time (23/26) and thrombin time (21/26). In all 26 patients fibrinogen levels fell below .20 g/100 ml and 16 had levels below .10 g/100 ml. Sixteen patients had plasma coagulation factor assays performed. In these 16 patients, Factor XI was less than 40% in 14 and Factor XI was less than 70% in 9, with only a few scattered low levels of other factors. There were no clinical bleeding episodes. Coagulation abnormalities returned to normal at the completion of L-asparaginase therapy while the patients remained on vincristine and prednisone.
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