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Dysfibrogenemias are characterized by the production of abnormally functioning fibrinogen, occurring in the presence of liver disease, medication toxicity, malignancy, or genetic mutation. Here, we report a patient with multiple, separate episodes of hepatic portal system thromboses associated with dysfibrinogenemia. Molecular studies identified the presence of a 554Arg→Cys mutation in the fibrinogen Aα gene, previously identified as Fibrinogen Dusart (also known as Fibrinogen Paris V and Fibrinogen Chapel Hill). This case further illustrates the association of this dysfibrinogenemia with a unique thrombophilic manifestation.