['To determine factors affecting the success of radiation therapy (RT) of spinal epidural metastases and patient survival after RT.', 'One hundred thirty-nine male veterans with an initial spinal epidural metastases treated with dexamethasone and RT were evaluated prospectively. Patients were followed until death.', 'At presentation, 84 patients could walk. After RT, 119 patients walked. The likelihood of regaining ambulation increased if treatment began <12 hours after loss of ambulation and if patients had bladder and bowel function and sacral sensory sparing. Treatment reduced pain levels, and ambulatory patients had less pain compared with nonambulatory patients. Median length of survival was 104 weeks for ambulatory patients and 6 weeks for nonambulatory patients. Mean interval between loss of ambulation and death was 4.0 +/- 0.5 weeks. Recurrent spinal epidural metastases occurred in 8.63% of patients.'] Does treatment of spinal epidural metastasis improve patient survival and functional state?