Severe bleeding in a woman heterozygous for the fibrinogen γR275C mutation:
BLOOD COAGULATION & FIBRINOLYSIS(2010)
摘要
The dysfibrinogen gamma R275C can be a clinically silent mutation, with only two out of 17 cases in the literature reporting a hemorrhagic presentation and four cases reporting a thrombotic presentation. We describe here a particularly severe presentation in 54-year-old female patient who required a hysterectomy at 47 years of age due to heavy menstrual bleeding. Coagulation studies revealed a prolonged prothrombin time and thrombin time, a normal fibrinogen antigen level, and a low fibrinogen activity level. Molecular analysis of the patient's DNA revealed a gamma chain gene mutation resulting in an amino acid substitution at residue 275 (gamma R275C). Protein sequencing of the fibrinogen gamma chain confirmed this mutation, which was named Fibrinogen Portland I. This case demonstrates that the gamma R275C mutation can lead to a severe hemorrhagic phenotype. Blood Coagul Fibrinolysis 21:494-497 (C) 2010 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.
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关键词
fibrinogen,hemorrhage,mutation
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