Common hereditary elliptocytosis

Common hereditary elliptocytosis (HE), also known as hereditary ovalocytosis, is a group of inherited red blood cell membrane disorders characterized by the presence of elliptical (oval-shaped) erythrocytes on peripheral blood smear. The condition results from mutations in genes encoding red blood cell membrane skeletal proteins, most commonly alpha-spectrin (SPTA1), beta-spectrin (SPTB), and protein 4.1 (EPB41). These structural protein defects impair the mechanical stability and deformability of the red blood cell membrane, causing the normally biconcave disc-shaped cells to assume an elongated, elliptical shape. The clinical severity of common hereditary elliptocytosis is highly variable. The majority of affected individuals are asymptomatic carriers identified incidentally on a blood smear, with little or no hemolysis. However, some patients experience mild to moderate chronic hemolytic anemia with associated symptoms such as fatigue, jaundice, splenomegaly, and an increased risk of gallstones. Neonates with HE may present with more pronounced hemolysis and jaundice that typically improves during the first year of life as fetal hemoglobin is replaced by adult hemoglobin. In rare cases, particularly when homozygous or compound heterozygous mutations are present, severe hemolytic anemia can occur, sometimes referred to as hereditary pyropoikilocytosis. Treatment for common hereditary elliptocytosis is generally not required for asymptomatic individuals. For patients with clinically significant hemolytic anemia, management may include folic acid supplementation to support increased red blood cell production, monitoring for complications such as gallstones, and in severe cases, splenectomy, which can substantially reduce hemolysis and improve anemia. Blood transfusions may be necessary during hemolytic crises or in severe neonatal presentations. Genetic counseling is recommended for affected families.

Common questions about Common hereditary elliptocytosis