The "staging," or evaluation of extent of disease, for both HL and NHL, is similar.

• Stage I (early disease) - Lymphoma located in a single lymph node region or in one area or organ outside the lymph node
• Stage II (locally advanced disease) - Lymphoma located in two or more lymph node regions all located on the same side of the diaphragm or in one lymph node region and a nearby tissue or organ. (The diaphragm is a flat muscle that separates the chest from the abdomen.)
• Stage III (advanced disease) - Lymphoma affecting two or more lymph node regions, or one lymph node region and one organ, on opposite sides of the diaphragm
• Stage IV (widespread or disseminated disease) - Lymphoma outside the lymph nodes and spleen that has spread to another area or organ such as the bone marrow, bone, or central nervous system.

Updated:: 04/04/2019 []