Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Pearson marrow-pancreas syndrome ?
    ### Response:
    Pearson marrow-pancreas syndrome is a severe disorder that usually begins in infancy. It causes problems with the development of blood-forming (hematopoietic) cells in the bone marrow that have the potential to develop into different types of blood cells. For this reason, Pearson marrow-pancreas syndrome is considered a bone marrow failure disorder.
    