[Hemophilia.]

Area of Science:

• Hematology
• Genetics
• Internal Medicine

Background:

• Hemophilia is an inherited bleeding disorder characterized by hemorrhage.
• It presents as hemophilia A (factor VIII deficiency) or hemophilia B (factor IX deficiency).
• Bleeding severity correlates with plasma levels of factors VIII or IX, categorized as mild, moderate, or severe.

Purpose of the Study:

• To summarize the understanding of hemophilia A and B.
• To outline diagnostic methods and current treatments.
• To mention potential future therapies and complications.

Main Methods:

• Review of hemophilia A and B characteristics.
• Description of diagnostic laboratory tests, including activated partial thromboplastin time (aPTT).
• Explanation of current treatment modalities and potential complications.

Main Results:

• Hemophilia A and B are distinguished by deficiencies in specific clotting factors.
• Diagnosis relies on quantifying factor VIII or IX levels, as aPTT may be isolatedly prolonged.
• Treatment involves administering exogenous factor concentrates.

Conclusions:

• Hemophilia A and B are genetic bleeding disorders requiring specific factor level assessment for diagnosis.
• Current management focuses on factor replacement therapy.
• Gene therapy offers future curative potential, while complications like inhibitors and arthropathy require ongoing attention.