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Inherited haemorrhagic disease with abnormal prothrombin consumption
British Journal of Haematology
|September 1, 1985
Summary
This study identifies a rare bleeding disorder in a child caused by abnormal prothrombin, a key clotting protein. This molecular defect leads to impaired blood clot formation, explaining the patient's excessive bleeding.
Area of Science:
- Hematology
- Molecular Biology
- Biochemistry
Background:
- Investigating inherited bleeding disorders is crucial for effective diagnosis and management.
- Prothrombin (Factor II) plays a central role in the coagulation cascade, essential for hemostasis.
- Disorders of prothrombin can lead to significant hemostatic defects, including excessive bleeding.
Observation:
- A 4-year-old boy presented with severe bleeding post-surgery, recurrent hematomas, and epistaxis.
- Standard coagulation tests were normal, except for abnormal prothrombin consumption tests.
- The patient's father also exhibited an abnormal prothrombin consumption index, suggesting a familial trait.
Findings:
- Prothrombin conversion was significantly delayed, taking up to 24 hours to reach completion.
- Plasma prothrombin levels and electrophoretic mobility were normal.
- Crossed immunoelectrofocusing revealed an abnormal isoelectric point (pI) in purified prothrombin, indicating a molecular anomaly.
Implications:
- The findings suggest the presence of an abnormal prothrombin molecule responsible for impaired coagulation.
- This molecular defect in prothrombin can cause a distinct bleeding disorder.
- Further characterization of this abnormal prothrombin is needed for precise diagnosis and potential therapeutic strategies.