cytogenetic studies were carried out in peripheral blood lymphocytes of 31 children with cancer ( 12 retinoblastomas , 9 non-hodgkin 's lymphomas , 7 neuroblastomas and 3 wilms ' tumors ) with the purpose of investigating the prevalence and persistence of chromosomal aberrations before onset of antineoplastic treatment and at different intervals thereafter .
C0006826
cancer
C0035335
retinoblastomas