Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Fanconi anemia ?
    ### Response:
    Fanconi anemia is a condition that affects many parts of the body. People with this condition may have bone marrow failure, physical abnormalities, organ defects, and an increased risk of certain cancers.  The major function of bone marrow is to produce new blood cells.
    