Over the years, doctors have used a variety of terms to classify the
many different types of
non-Hodgkin's lymphomas. Most often, they are grouped
by how the cancer cells look under a microscope and how quickly they are likely
to grow and spread. Some types spread more quickly than others.
Aggressive lymphomas, also known as intermediate-
and high-grade lymphomas, tend to grow and spread quickly and cause severe
Indolent lymphomas, also referred to as low-grade
lymphomas, tend to grow quite slowly and cause fewer symptoms.