Waldenström Macroglobulinemia

Waldenström Macroglobulinemia is a rare type of cancer that affects the blood and immune system. It involves the overproduction of abnormal white blood cells called lymphoplasmacytic cells in the bone marrow. These cells produce large amounts of a protein called IgM antibody, which can thicken the blood and cause symptoms like fatigue, bleeding, and vision problems. The disease mainly affects older adults and can lead to complications such as infections and nerve damage. Diagnosis often involves blood tests and bone marrow examination to detect the abnormal cells and protein levels.

Waldenström Macroglobulinemia is a lymphoplasmacytic lymphoma characterized by clonal proliferation of B cells that produce a monoclonal IgM paraprotein. The disease results from malignant transformation of lymphoplasmacytic cells in the bone marrow, leading to infiltration and overproduction of IgM, which causes hyperviscosity syndrome and other systemic symptoms. It is associated with mutations in the MYD88 gene in most cases, which promotes survival and proliferation of malignant cells. Clinically, patients present with symptoms related to anemia, bleeding, neuropathy, and hyperviscosity. Diagnosis requires demonstration of bone marrow infiltration by lymphoplasmacytic cells and detection of monoclonal IgM in serum. The disease is considered an indolent but incurable B-cell malignancy.