NCCN Guidelines for Patients
Peripheral T-cell Lymphoma, Version 1.2016
• The lymphatic system consists of lymph and
a network of vessels and organs. It helps kill
germs in the body and transports fluids to the
• Lymphomas are cancers that start in
lymphocytes within the lymphatic system.
Peripheral T-cell lymphoma starts in T-cells
that have left the thymus (mature T-cells).
• Peripheral T-cell lymphoma is often a fast-
growing cancer. Often, it will spread from one
group of tissues to the next and so on.
• Incisional or excisional biopsy is needed to
diagnose peripheral T-cell lymphoma.
• The biopsy tissue should be tested by a
hematopathologist. The hematopathologist will
perform a number of tests that assess for cell
type, surface proteins, and maybe genetics.
You may also be tested for HTLV to know
which cancer you have.