Department of Pediatric Hematology;
State Key Laboratory of Experimental Hematology;
National Clinical Research Center for Blood Diseases;
Institute of Hematology&Blood Diseases Hospital;
Chinese Academy of Medical Sciences&Peking Union Medical College;
Tianjin 300020;
China;
Department of Pathology;
State Key Laboratory of Experimental Hematology;
National Clinical Research Center for Blood Diseases;
Institute of Hematology&Blood Diseases Hospital;
Chinese Academy of Medical Sciences&Peking Union Medical College;
Tianjin 300020;
China;
Department of Hematology;
the Second Hospital of Shanxi Medical University;
Taiyuan 030001;
China;
primitive neuroectodermal tumor; second malignant neoplasms; childhood; acute lymphoblastic leukemia;