Determined by site. Stage 1: involvement of a single lymph node region or single non-lymph node site stage 2: involvement of two or more lymph node regions on the same side of the diaphragm stage 3: involvement of lymph node regions on both sides of the diaphragm stage 4: significant or widespread involvement of non-lymph node sites.
There are 4 stages. The staging for hodgkin lymphoma is based on an international staging system, which takes into account how many areas and where in the body the lymphoma is found. Additionally, certain symptoms can also alter the stage. Read more about it here: http://www.Cancer.Gov/cancertopics/pdq/treatment/adulthodgkins/patient/page2.