a 1-hr incubation with 10 ( -5 ) m melphalan significantly inhibited tumor colony growth of both fresh neuroblastoma and osteosarcoma cells ( p less than 0.01 ) while ewing 's sarcoma cells and normal bone marrow appeared resistant to melphalan even at a 100-fold higher concentration .
C0029463
osteosarcoma
C0553580
ewing 's sarcoma