title: Inhibitor to factor V in severe factor V congenital deficiency. A case report.
abstract: A case of severe factor V deficiency that developed an inhibitor to factor V following the treatment with fresh frozen plasma (FFP) is described. The patient had a CRM-negative form of factor V congenital deficiency: no factor V antigen could be assayed in her plasma. A sister who supposedly had a severe factor V deficiency died as a result of a severe posttransfusional hepatitis. Two other members of the family were found to be heterozygotes. After several exposures to FFP, the propositus became refractory to the treatment with the appearance of a low titre inhibitor (5 units) which, nevertheless, could not be overcome by plasma infusions.
mesh_terms: D001777:Blood Coagulation; D002648:Child; D005165:Factor V / Q000037:antagonists & inhibitors*; D005166:Factor V Deficiency / Q000097:blood / Q000151:congenital*; D005260:Female; D006801:Humans
chemical_list: D005165:Factor V