NCIt definition : A list of five factors that help doctors assess how a non-Hodgkin lymphoma patient
might respond to a certain treatment or predict the risk of disease recurrence and
survival following therapy. The factors are: 1) patient's age, 2) stage of disease:
an indication of how localized or widespread is the disease, 3) LDH levels: serum
levels often correlate with the amount of tumor in the body, 4) the number of extranodal,
non-lymphatic sites found, 5) the patient's overall health. (from Lymphoma Research
Foundation of America glossary (www.lymphoma.org));