4.5. Other scoring systems
extranodal involvement, high-intermediate, Ann Arbor stage III/IV, NHL
ONCOLOGY, NHL
In addition to the Ann Arbor staging system, there are other scoring systems used to evaluate the prognosis of NHL, one of which is the International Prognostic Index (IPI). IPI contains 5 prognostic factors: age >60 years, serum lactate dehydrogenase (LDH), Ann Arbor stage III/IV, the Eastern Cooperative Oncology Group performance status >2, and >1 site with extranodal involvement. It also categorizes patients into 4 risk groups: low-risk, low-intermediate risk, high-intermediate risk, and high-risk.