(Congenital Spherocytic Anemia; Hereditary Spherocytosis)

Pronounced: sf-er-oh-sigh-TO-sis


Spherocytosis is a condition that causes an abnormality in the red blood cell membrane. While healthy blood cells are shaped like flattened, indented discs, these abnormal membranes lead to sphere-shaped red blood cells, and the premature breakdown of those cells.

Red blood cells suffering from spherocytosis are smaller, rounder in shape, and more fragile than healthy red blood cells. The rounded shape causes the red blood cells to be caught in the spleen, where they break down.

Spherocytosis cases may be mild, with minor symptoms, or severe with symptoms that quickly surface. These symptoms may occur after certain types of infections. Severe cases may be diagnosed in childhood, while those with mild symptoms may not be diagnosed until adulthood.

With treatment, symptoms can be controlled.

Healthy Red Blood Cells

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Spherocytosis is a hereditary condition caused by genes inherited from the parents.

Risk Factors

Spherocytosis occurs in all races, but is most common in people of northern European descent. Having a family member with spherocytosis also increases your risk.


Spherocytosis may cause:

  • Yellowing of the skin and/or whites of the eyes—known as jaundice
  • Pallor
  • Shortness of breath
  • Fatigue
  • Weakness
  • In children, irritability and moodiness


You will be asked about your symptoms and medical history. A physical exam will be done.

Your bodily fluids may be tested. This can be done with blood tests.


Talk with your doctor about the best treatment plan for you. Treatment options include:

Folic Acid Supplementation

Folic acid 1 mg/day and consideration for blood transfusions are recommended during periods of severe anemia.


Surgical removal of the spleen can cure the anemia. The abnormal shape of blood cells remain, but the blood cells are no longer destroyed in the spleen.

Currently, meningococcal, Haemophilus, and pneumococcal vaccines are administered several weeks before splenectomy. Lifetime penicillin prophylaxis is recommended after surgery to prevent dangerous infections. The surgery is not recommended for children under 5 years old. There is a lifetime risk of serious and potentially life-threatening infections.


Because spherocytosis is an inherited condition, it is not possible to prevent the disease. However, egular screening of individuals at high risk can prevent the risk of complications of the disease with early treatment.


Centers for Disease Control and Prevention

National Heart, Lung, and Blood Institute


Health Canada

The College of Family Physicians of Canada


Delaunay J. The molecular basis of hereditary red blood cell membrane disorders. Blood Rev. 2007;21(1):1-20.

Hereditary spherocytosis. EBSCO DynaMed Plus website. Available at: Updated June 24, 2015. Accessed October 2, 2017.

Hereditary spherocytosis. GARD—Genetic and Rare Diseases Information Center website. Available at: Updated September 26, 2017. Accessed October 2, 2017.

Hereditary spherocytosis. Genetics Home Reference website. Available at: Updated September 26, 2017. Accessed October 2, 2017.

Last reviewed September 2018 by EBSCO Medical Review Board Marcin Chwistek, MD  Last Updated: 9/30/2013