title: Hyperacute radiation pneumonitis.
abstract: We present a patient who developed radiation pneumonitis only eight days after beginning therapy. The pneumonitis responded dramatically to prednisone on four occasions, which was a helpful point in the differential diagnosis.
mesh_terms: D000208:Acute Disease; D000328:Adult; D006801:Humans; D008168:Lung / Q000528:radiation effects*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D008297:Male; D011014:Pneumonia / Q000209:etiology*; D011241:Prednisone / Q000627:therapeutic use; D011658:Pulmonary Fibrosis / Q000209:etiology; D011832:Radiation Injuries / Q000188:drug therapy; D011859:Radiography
chemical_list: D011241:Prednisone