It is well known that localized cancers, including aggressivenon-Hodgkin's lymphoma, have a better prognosis than cancersthat have spread. When the results of treatment for aggressivenon-Hodgkin's lymphoma are reported, the results for Ann Arborstage I disease (involvement of a single lymph-node region)are typically reported separately from those for stage III (involvementof lymph nodes on both sides of the diaphragm) and stage IV(stage III plus extranodal involvement). The results of treatmentfor stage II disease (involvement of two or more lymph nodeson the same side of the diaphragm) may be included in eithergroup.
From the University of Nebraska Medical Center, Omaha.
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