Stage	Involvement	Five-year relative survival rates (%)
I	Single lymph node region (I) or one extranodal site (IE)	90 to 95
II	Two or more lymph node regions, same side of the diaphragm (II) or local extralymphatic extension plus one or more lymph node regions same side of the diaphragm (IIE)	90 to 95
III	Lymph node regions on both sides of the diaphragm (III), which may be accompanied by local extralymphatic extension (IIIE)	85 to 90
IV	Diffuse involvement of one or more extralymphatic organs or sites	80