Roentgen manifestations of radiation injury to the gastrointestinal tract.

Radiation injury of the gastrointestinal tract requires a minimum dose of 4200 to 4500 rads. The symptoms and signs of radiation injury usually appear within 6 to 24 months following therapy. The radiation induced changes include mucosal atrophy and ulceration associated with an obliterative endarteritis in the supportive vasculo-connective tissue. The roentgen manifestations are those of an ischemic process but may also mimic those of recurrent malignant disease. Obstruction, hemorrhage, and fistula formation are common complications. Surgery is frequently required. The morbidity and mortality is considerable.