HAGEMAN FACTOR DEFICIENCY IN A CHILD.

A case of Hageman factor deficiency in a 13-year-old white female is presented and the laboratory procedures necessary for identification of this abnormality are outlined. No bleeding was observed at the time of tonsillectomy and adenoidectomy, confirming the benign nature of the disorder. Decreased Hageman factor activity was found in the plasma of other family members, being in accord with the autosomal recessive nature of the characteristic responsible for this factor.