Table 1.

Patient Characteristics

Characteristic	Value
Age, yr
Median (range)	7.0 (.2-19.4)
Gender
Female	54
Male	88
Underlying disease
Immunedeficiency∗	27
Leukemia/lymphoma	60
Bone marrow failure†, bone marrow disease without chemotherapy‡	30
Inborn error of metabolism§	25

^∗Immune deficiencies include combined immune deficiency, severe combined immune deficiency, hemophagocytic lympho histiocytosis, autoimmune lymphoproliferative syndrome, and chronic granulomatous disease. Leukemia includes acute lymphoblastic leukemia and acute myeloid leukemia.

^†Bone marrow failure includes Fanconi anemia, congenital agranulocytosis, and thallasemia.

^‡Bone marrow diseases not pretreated with chemotherapy include myelodysplastic syndrome and juvenile myelomonocytotic leukemia.

^§Inborn errors of metabolism includes predominantly Hurler syndrome.