What is the term for the condition characterized by an excess of hemoglobin A2, a minor component of normal adult hemoglobin?

A Beta-thalassemia
B Delta-beta-thalassemia ✓
C Hemoglobin H disease
D Delta-beta-thalassemia trait

Explanation

Delta-beta-thalassemia is a rare genetic disorder characterized by an excess of hemoglobin A2, a minor component of normal adult hemoglobin. This condition results from mutations in the HBB and HBD genes, leading to impaired production of the beta-globin and delta-globin chains.

Source

Orphanet Journal of Rare Diseases
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Hard MEDICAL Confidence: medium