Health Topics A-to-Z
What Is It? Non-Hodgkin lymphoma is a group of about 30 different cancers that arise in lymph nodes, lymphatics and blood cells. It is also called non-Hodgkin’s lymphoma, NHL, or lymphoma. Non-Hodgkin lymphoma begins in the lymph system. The lymph (or lymphatic) system is part of the immune system. It collects and destroys invading organisms such as viruses and abnormal cells. The lymph system protects the body from infection and disease.