The Cotton O'Neil Cancer Center is a specialty medical clinic within the Stormont Vail Health network, providing outpatient services to children, adolescents and adults who have a diagnosis of cancer or blood disorder. The 31,500-square-foot facility is located at 1414 S.W. Eighth Ave., just northeast of the main Stormont Vail campus. The center, opened in December 2006, consolidates all outpatient cancer services of Stormont Vail and Cotton O'Neil. It has the latest in technology, including one of the few Trilogy Image-Guided Radiotherapy linear accelerator systems in the state of Kansas and a PET/CT in a 13-county area