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Table 3 Revised staging system for primary nodal lymphomas*

From: The imaging conundrum of hepatic lymphoma revisited

Stage Involvement Extranodal (E) status
Limited
Stage I One node or a group of adjacent nodes Single extranodal lesion without nodal involvement
Stage II Two or more nodal groups on the same side of the diaphragm Stage I or II by nodal extent with limited contiguous extranodal involvement
Stage II bulky II as above with “bulky” disease Not applicable
Advanced
Stage III Nodes on both sides of the diaphragm; nodes above the diaphragm with spleen involvement Not applicable
Stage IV Additional non-contiguous extralymphatic involvement Not applicable
  1. *Adapted from reference [38]