Monoclonal B-cell lymphocytosis is when your body produces an elevated number of identical B cells. In some cases, it can develop into chronic lymphocytic leukemia. Monoclonal B-cell lymphocytosis ...

The lymphatic system is the network of vessels, tissues, and organs that are part of the body’s immune system. Lymphoma develops in infection-fighting cells called lymphocytes that circulate through ...

Stage 4 diffuse large B-cell lymphoma (DLBCL) is a rapidly growing lymphoma affecting at least one other organ outside the lymphatic system. Cancer is the unusual growth and spread of cells within the ...

Our B cells help prevent us from getting sick. Their job is to make antibodies, immune system proteins that fight off viruses and other foreign invaders. And they make a lot of antibodies—thousands of ...