Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Hereditary spherocytosis ?
    ### Response:
    What causes hereditary spherocytosis? Hereditary spherocytosis may be caused by mutations in any one of several genes. The mutations that cause the condition result in the formation of spherical, overly rigid, misshapen red blood cells. The misshapen red blood cells, called spherocytes, are removed from circulation and taken to the spleen for destruction.
    