A rare, inherited disorder in which the pancreas and bone marrow do not work the way they should. Symptoms include problems digesting food, a low number of neutrophils (a type of white blood cell), bone problems, and being short. Infants with the disorder get bacterial infections and are at an increased risk of aplastic anemia, myelodysplastic syndrome, and leukemia. Also called Shwachman syndrome and Shwachman-Diamond syndrome.