HbC Disease

HbC Disease is a genetic blood disorder that affects the red blood cells, which are responsible for carrying oxygen throughout the body. It involves a change in the hemoglobin protein, specifically the hemoglobin C variant, which can cause red blood cells to become less flexible and more prone to breaking down. This can lead to mild anemia, causing symptoms like fatigue and weakness. The disease primarily impacts the blood and circulatory system. People with HbC Disease may experience episodes of mild jaundice and an enlarged spleen. It is generally less severe than sickle cell disease but still requires monitoring for complications related to red blood cell breakdown.

HbC Disease is a hereditary hemoglobinopathy caused by a homozygous mutation in the HBB gene resulting in the substitution of lysine for glutamic acid at the sixth position of the beta-globin chain, producing hemoglobin C (HbC). This mutation leads to the formation of intracellular hemoglobin crystals that cause red blood cell rigidity and mild chronic hemolytic anemia. The disease is characterized by mild to moderate hemolysis, splenomegaly, and target cells on peripheral smear. Unlike sickle cell disease, HbC does not typically cause vaso-occlusive crises but can cause mild symptoms related to anemia and splenic sequestration. It is most common in individuals of West African descent. The clinical significance lies in its potential to cause mild anemia and its interaction with other hemoglobinopathies, such as sickle cell trait, which can worsen clinical outcomes.