PEDIATRICS Vol. 44 No. 6 December 1969, pp. 1007-1009
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Acquired Factor X Deficiency in a Negro Boy

William L. Bayer M.D.1, Dario Curiel C. M.D.1, Isabel L. F. Szeto M.D.1, and Jessica H. Lewis M.D.1

1 Community Blood Bank of the Kansas City Area, Inc., 4040 Main Street, Kansas City, Missouri 64111

A Negro boy suffering from severe hemorrhagic disease associated with a single acquired defect in coagulation factor X is presented. No cause for this deficiency could be found. Vitamin K1 had no effect. He improved spontaneously and is completely healthy 6 months later.