Table 1. Anatomic Stage/Prognostic Groupsa
| Stage | Prognostic Groups |
| aReprinted with permission from AJCC: Hodgkin and non-Hodgkin lymphomas. In Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 607–11. | |
| I | Involvement of a single lymphatic site (i.e., nodal region, Waldeyer ring, thymus or spleen) (I). |
| OR | |
| Localized involvement of a single extralymphatic organ or site in the absence of any lymph node involvement (IE) (rare in Hodgkin lymphoma). | |
| II | Involvement of two or more lymph node regions on the same side of the diaphragm (II). |
| OR | |
| Localized involvement of a single extralymphatic organ or site in association with regional lymph node involvement with or without involvement of other lymph node regions on the same side of the diaphragm (IIE). The number of regions involved may be indicated by a subscript Arabic numeral, for example, II3 | |
| III | Involvement of lymph node regions on both sides of the diaphragm (III), which also may be accompanied by extralymphatic extension in association with adjacent lymph node involvement (IIIE) or by involvement of the spleen (IIIS) or both (IIIE, IIIS). Splenic involvement is designated by the letter S. |
| IV | Diffuse or disseminated involvement of one or more extralymphatic organs, with or without associated lymph node involvement. |
| OR | |
| Isolated extralymphatic organ involvement in the absence of adjacent regional lymph node involvement, but in conjunction with disease in distant site(s). Stage IV includes any involvement of the liver or bone marrow, lungs (other than by direct extension from another site), or cerebrospinal fluid. | |
