Source:http://linkedlifedata.com/resource/umls/id/C0332305
NCI: Performing exams and tests to learn the extent of the cancer within the body, especially whether the disease has spread from the original site to other parts of the body. It is important to know the stage of the disease in order to plan the best treatment.,NCI: The process of defining at what point in the natural history of a malignant disease a patient is when a diagnosis is made.