Hodgkin lymphoma has a standardized staging system (stages I-IV). The stages are defined by the locations of lymph nodes in the body that are infiltrated by the cancer. The higher the stage number, the more the disease has spread throughout the lymphoid system and into other parts of the body.
Stage I: Cancer is found in one location.
- Stage I: Cancer is found in a single lymph node region (most commonly in the neck).
- Stage IE: Cancer is found in one organ or site outside the lymph nodes.
Stage II: Cancer is found in more than one location, but the cancer sites are located either entirely above or below the diaphragm (the muscle located below the lungs).
- Stage II: Cancer is limited to two or more lymph node regions on the same side of the diaphragm.
- Stage IIE: Cancer is found in one or more lymph node regions and a nearby organ or site on the same side of the diaphragm.
Stage III: Cancer is found both above and below the diaphragm.
- Stage III: Cancer is limited to the lymph nodes, but affected nodes are on both sides of the diaphragm.
- Stage IIIE: Cancer is found in lymph nodes on both sides of the diaphragm, as well as in a nearby organ or site.
- Stage IIIS: Cancer is found in lymph nodes on both sides of the diaphragm, as well as in the spleen.
- Stage IIIES: Cancer is found in lymph nodes on both sides of the diaphragm, as well as in the spleen and a nearby organ or site.
Stage IV: Cancer is diffusely distributed through sites usually outside of the lymph nodes, with or without lymph node involvement. When cancer is found diffusely in tissues such as the lungs, liver, bone, or bone marrow it is classified as Stage IV.
In each stage of Hodgkin lymphoma, the disease receives a further classification as either A or B.
- A refers to disease without any of the 3 “B” symptoms
- B symptoms include:
- Unexplained recurrent fever exceeding 100.4˚F / 38.0˚C,
- Drenching night sweats, and
- Unintentional weight loss of at least 10% of body weight over 6 months.
For each stage, a sub-classification of X is assigned if “bulky disease” is present. Bulky disease is defined by an abdominal node or mass equal to or greater than 10 cm in size, or a thoracic mass equal to or greater than one-third of the transverse diameter of the thorax.
At the time of diagnosis, approximately 60% of children have stage I or II disease, 30% have stage III disease, and 10% have stage IV disease.