| I |
Involvement of the lymph nodes in one lymph node region |
A single localized, extralymphatic manifestation without lymph node involvement |
| II |
Involvement of two or more lymph node regions on the same side of the diaphragm |
Localized involvement of an extranodal organ or extranodal localization and one or several lymph node regions on the same side of the diaphragm |
| III |
Involvement of lymph node regions on both sides of the diaphragm |
Localized involvement of extralymphatic organs accompanied by lymph node involvement on both sides of the diaphragm |
| IV |
Diffuse extralymphatic involvement; liver involvement is always considered as diffuse involvement |
Not applicable |
