Which electrophoresis pattern is most indicative of beta-thalassemia major?

Get ready for the CAMLPR Hematology Test. Use our quizzes, flashcards, and detailed explanations to enhance your understanding. Prepare confidently for your exam!

Multiple Choice

Which electrophoresis pattern is most indicative of beta-thalassemia major?

The key idea is that beta-thalassemia major leaves a distinctive signature on hemoglobin electrophoresis: almost no HbA (the adult hemoglobin made from beta chains) with a dramatic rise in HbF (fetal hemoglobin) because the gamma chains compensate for the missing beta chains. HbA2 may be elevated too, but the standout feature is the near absence of HbA paired with very high HbF levels. This pattern reflects the severe deficiency of beta-globin production and the body's attempt to use gamma chains to form HbF. Other conditions don’t show this same HbA-dominant-to-HbF-dominant shift—iron deficiency or sideroblastic anemia lack the marked HbF elevation and the loss of HbA—so the electrophoresis pattern described above is most indicative of beta-thalassemia major.

The key idea is that beta-thalassemia major leaves a distinctive signature on hemoglobin electrophoresis: almost no HbA (the adult hemoglobin made from beta chains) with a dramatic rise in HbF (fetal hemoglobin) because the gamma chains compensate for the missing beta chains. HbA2 may be elevated too, but the standout feature is the near absence of HbA paired with very high HbF levels. This pattern reflects the severe deficiency of beta-globin production and the body's attempt to use gamma chains to form HbF. Other conditions don’t show this same HbA-dominant-to-HbF-dominant shift—iron deficiency or sideroblastic anemia lack the marked HbF elevation and the loss of HbA—so the electrophoresis pattern described above is most indicative of beta-thalassemia major.

More practice questions