Non-Hodgkin lymphoma (NHL) is a type of cancer that originates in the lymphatic system, which is a part of the body's immune system. It is characterized by the uncontrolled growth of lymphocytes, a type of white blood cell, in the lymph nodes, bone marrow, spleen, and other organs. There are many different subtypes of NHL, each with its own characteristics and treatment options. Risk factors for NHL include age, immune system deficiencies, certain infections, and exposure to certain chemicals or radiation. Research in the field of NHL focuses on understanding the causes of the disease, developing more effective treatments, improving survival rates, and enhancing quality of life for patients. This research may involve studying the underlying genetic and molecular mechanisms of the disease, testing new drugs and treatment approaches, and exploring ways to prevent or reduce the risk of developing NHL.