1. Chronic lymphocytic leukemia (CLL) : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
Chronic lymphocytic leukemia (CLL) causes a slow increase in the number of white blood cells called B cells in the bone marrow. The cancerous cells spread from the blood marrow to the blood, and can also affect the lymph nodes and other organs. CL...• 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. Leukemia  (Trust Mark: Doctor-Reviewed)
Leukemia is a cancer that starts in the organs that make blood, namely the bone marrow and the lymph system. Depending on specific characteristics, leukemia can be divided into two broad types: acute and chronic. Acute leukemias are the rapidly pr...• Author: Mai Tran, Teresa G. Odle