malignant tumor cells were detected in 266 specimens obtained from 106 children with the following malignant neoplasms : leukemia 44/133 , malignant lymphoma 13/64 , soft tissue sarcoma 13/48 , neuroblastoma 13/26 , wilms ' tumor 4/18 , malignant teratoma 4/13 , osteogenic sarcoma 7/11 , ewing 's sarcoma 2/10 , brain tumor 5/6 and retinoblastoma 1/1 .
C0006826
malignant neoplasms
C0024299
malignant