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Hereditary Spherocytosis Diagnosis & Treatment

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Hereditary Spherocytosis Diagnosis & Treatment

Hair-red-kid chasing Sphere-cells
Hereditary spherocytosis is a disorder of RBC membrane proteins, leading to small, round RBCs. This an intrinsic hemolytic anemia. Patients are diagnosed via the osmotic fragility test, and treatment includes folic acid supplementation, and eventually splenectomy.
Increased MCHC
Up-arrow M.C. He-man-globe

MCHC, or mean corpuscular hemoglobin concentration, is used to measure the concentration of hemoglobin in a given volume of packed RBCs. It is elevated in hereditary spherocytosis, as the cell is dehydrated and the membrane surface area is decreased.


As spectrin and ankyrin, which interact with the RBC membrane, are commonly defective, the RBC membrane is no longer anchored. Small, round, spherical RBCs are formed, which have no central pallor.

Normocytic Anemia
Normal-sized-cells Anemone

RBCs need to be flexible to pass through the spleen (cords of Billroth). As spherocytes are less flexible and abnormally shaped, they bottleneck in the spleen. They are then phagocytosed, leading to hemolysis. Thus, this disease is characterized as a normocytic (normal sized) anemia, which is intrinsic and extravascular.

Osmotic Fragility Test
Water-gun Bursting blood cell

This is the gold standard for diagnosing hereditary spherocytosis, though it has a high false negative rate. In this test, spherocytes easily rupture in hypotonic solutions due to increased membrane permeability to salt and water.

Chopped-off Spleen

Splenectomy, or surgical removal of the spleen, is indicated for moderate to severe cases of hereditary spherocytosis. Patients post-splenectomy are more susceptible to encapsulated bacterial infections, and on lab examination may show Howell-Jolly bodies.

Folic Acid
Flicking Acidic-lemon

As hereditary spherocytosis is an anemia, folic acid is supplemented to patients. Folic acid helps develop healthy RBCs. Furthermore, patients are creating more RBCs continuously, due to increased demand (as spherocytes are being destroyed). Thus, a folate deficiency may occur due to increased bone marrow demand.


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