The Lugano classification (2014), which modified the Ann Arbor system of 1971: stage I, one lymph node region; stage II, two or more on the same side of the diaphragm; stage III, both sides; stage IV, diffuse involvement of an organ outside the lymphatic system.
The suffix E marks a single extranodal site reached by direct extension, and the suffixes A and B for the absence or presence of fever, night sweats and weight loss are formally recorded only for Hodgkin lymphoma.
Bulk is recorded separately : a single mass of 10 cm or more, or more than a third of the width of the chest, which changes treatment in several subtypes.