Staging system for extranodal lymphomas. Modified Ann Arbor classification.
|IE||Involvement of a single lymph node region or a single organ.|
|IIE||Involvement of a single extralymphatic organ or site and one or more regional lymph nodes ipsilateral to diaphragm.|
|IIE||Involvement of a single extralymphatic organ or site and regional lymph nodes on both sides of the diaphragm.|
|IVE||Diffuse involvement or dissemination of one or more extralymphatic sites, with or without the involvement of lymphatic nodes.|