Which of the following is not associated with hereditary spherocytosis?

Which of the following is not associated with hereditary spherocytosis?

• A. Increased osmotic fragility
• B. An MCHC greater than 36%
• C. Intravascular hemolysis
• D. Extravascular hemolysis

Answer: (C)

Hereditary spherocytosis is a genetic condition that affects red blood cells, leading to their characteristic spherical shape. This shape impacts their resilience and functionality. Increased osmotic fragility is a hallmark of the condition, as the spherocytes are more prone to rupture when exposed to hypotonic solutions, which is a consequence of their altered membrane structure. An elevated mean corpuscular hemoglobin concentration (MCHC) greater than 36% is also typical in hereditary spherocytosis. This increase is due to the spherical shape of the cells, which leads to a higher concentration of hemoglobin per volume of red blood cell. Extravascular hemolysis is associated with hereditary spherocytosis because the abnormal spherocytes are preferentially destroyed by the spleen. The spleen recognizes these cells as defective due to their shape and membrane irregularities, leading to their removal and subsequent hemolysis. In contrast, intravascular hemolysis is less characteristic of hereditary spherocytosis. While there may be instances of intravascular hemolysis in various hemolytic anemia conditions, it does not form a primary feature of hereditary spherocytosis, which predominantly involves extravascular hemolysis. Therefore, the association

Hereditary spherocytosis is a genetic condition that affects red blood cells, leading to their characteristic spherical shape. This shape impacts their resilience and functionality. Increased osmotic fragility is a hallmark of the condition, as the spherocytes are more prone to rupture when exposed to hypotonic solutions, which is a consequence of their altered membrane structure.

An elevated mean corpuscular hemoglobin concentration (MCHC) greater than 36% is also typical in hereditary spherocytosis. This increase is due to the spherical shape of the cells, which leads to a higher concentration of hemoglobin per volume of red blood cell.

Extravascular hemolysis is associated with hereditary spherocytosis because the abnormal spherocytes are preferentially destroyed by the spleen. The spleen recognizes these cells as defective due to their shape and membrane irregularities, leading to their removal and subsequent hemolysis.

In contrast, intravascular hemolysis is less characteristic of hereditary spherocytosis. While there may be instances of intravascular hemolysis in various hemolytic anemia conditions, it does not form a primary feature of hereditary spherocytosis, which predominantly involves extravascular hemolysis. Therefore, the association