Cancer

Cancer is a group of diseases characterized by uncontrolled growth of tissue cells in the body and the invasion by these cells into nearby tissue and migration to distant sites. Cells are the building blocks of living things.
Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn't need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die.
There are many different kinds of cancers. Cancer can develop in almost any organ or tissue, such as the lung, colon, breast, skin, bones, or nerve tissue.

Waldenstrom's macroglobulinemia

Waldenstrom macroglobulinemia (mak-ro-glob-u-lih-NEE-me-uh), also called WM or lymphoplasmacytic lymphoma, is a type of non-Hodgkin's lymphoma (also called non-Hodgkin lymphoma). WM is a rare, slow-growing cancer that begins in the immune system. Abnormal white blood cells (lymphocytes) in the bone marrow make an abnormal protein called monoclonal immunoglobulin M (IgM) that thickens the blood plasma. This causes the symptoms of WM.
The most common signs and symptoms include fatigue, nosebleeds, dizziness, gum bleeding, weight loss, bruising, headache, and numbness or tingling in your hands or feet. Your doctor may also find enlarged lymph glands in your neck, groin or under your arms.