Intensity-Modulated Radiation Therapy in Treating Younger Patients With Lung Metastases

Inclusion Criteria: * Patients may have a Wilms tumor, Ewing Sarcoma, Rhabdomyosarcoma or any other metastatic pediatric malignancy; patients may have a single or multiple pulmonary metastases at the time of diagnosis or at the time of recurrence; a pulmonary metastasis may be defined as one pulmonary nodule \>= 1 cm or more than one pulmonary nodules \>= 0.5 cm; a biopsy of the nodules may be considered in case of doubt * The Karnofsky performance status must be \>= 50 for patients \> 16 years of age and the Lansky performance status must be \>= 50 for patients =\< 16 years of age * Patients must not have received prior radiation therapy to any part of the thorax * Adequate cardiac function defined as: * Shortening fraction of \>= 27% by echocardiogram, or * Ejection fraction of \>= 50% by radionuclide angiogram * Female patients of childbearing age must have a negative pregnancy test * Female patients who are lactating must agree to stop breast-feeding * Sexually active patients of childbearing potential must agree to use effective contraception Exclusion Criteria: * Patients enrolled on Children's Oncology Group protocols cannot be treated with whole lung IMRT on this study * Patients who have a prior history of radiation therapy to the thorax or adjacent regions cannot be entered on this protocol * Patient with Hodgkin's Lymphoma are not eligible for this study * Patients with mediastinal masses or other pulmonary masses requiring additional mediastinal or lung irradiation beyond the whole lung irradiation (WLI) doses stated in this protocol are ineligible for this study * Patients who may require concurrent or sequential irradiation to sites beyond the chest such as the neck, flank, abdomen or liver are eligible for this study