1. Non-Hodgkin's lymphoma : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
White blood cells called lymphocytes are found in lymph tissues. Most lymphomas start in a type of white blood cells called B lymphocytes, or B cells. For most patients, the cause of this cancer is unknown. However, lymphomas may develop in people...• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Non-Hodgkin's Lymphoma  (Trust Mark: Doctor-Reviewed)
One of two general types of lymphomas (cancers that begin in lymphatic tissues and can invade other organs) differing from Hodgkin's disease (HD) by a lack of Hodgkin's-specific Reed-Sternberg cells.• Author: Kate Kretschmann