Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Congenital dyserythropoietic anemia type 2 ?
    ### Response:
    Congenital dyserythropoietic anemia type 2 (CDA II) is an inherited blood disorder characterized by mild to severe anemia. It is usually diagnosed in adolescence or early adulthood. Many affected individuals have yellowing of the skin and eyes (jaundice) and an enlarged liver and spleen (hepatosplenomegaly) and gallstones.
    