Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hemochromatosis type 4 ?
    ### Response:
    Hemochromatosis type 4 is a disease in which too much iron builds up in the body.  This extra iron is toxic to the body and can damage the organs. Hemochromatosis is inherited in an autosomal dominant manner. It is caused by mutations in the SLC40A1 gene. Hemochromatosis may be aquired or hereditary.
    