Stereotactic Radiosurgery in Treating Patients With Liver Metastases, Lung Metastases, or Other Advanced Solid Tumors

DISEASE CHARACTERISTICS: Histologically or cytologically confirmed malignancy Extracranial recurrent or metastatic disease or primary tumor not predicted to be controlled with standard radiotherapy Incurable with any standard therapy No tumors involving critical structures (e.g., mucosal surfaces (bowel or bladder) or heart) Tumor visible by CT scan PATIENT CHARACTERISTICS: Age: Not specified Performance status: Karnofsky 60-100% Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin less than 2.0 times upper limit of normal (ULN) AST and ALT less than 5 times ULN Renal: Creatinine less than 2.0 mg/dL Pulmonary: FEV1 greater than 0.75 L Other: No unsuitable size or geometric proportion that would preclude stereotactic immobilization Not pregnant or nursing Fertile patients must use effective contraception PRIOR CONCURRENT THERAPY: Biologic therapy: At least 14 days since prior anticancer biologic therapy and recovered Chemotherapy: At least 14 days since prior anticancer chemotherapy and recovered Endocrine therapy: At least 14 days since prior anticancer endocrine therapy and recovered Radiotherapy: See Disease Characteristics At least 14 days since prior anticancer radiotherapy and recovered Surgery: Not specified