Waldenstrom macroglobulinemia (WM) is a type of non Hodgkin lymphoma (NHL) . The cancer cells make large amounts of an abnormal protein (called a macroglobulin). Another name for WM is lymphoplasmacytic lymphoma. This condition used to be called Waldenstrom’s macroglobulinemia, so some people refer to it as Waldenstrom’s.
To understand WM, it helps to know about the functions of lymphoid tissue in the body.