Castleman disease is a rare disorder that involves an overgrowth (proliferation) of cells in your body's disease-fighting network (lymphatic system). Also known as giant lymph node hyperplasia and angiofollicular lymph node hyperplasia, Castleman disease can occur in a localized (unicentric) or widespread (multicentric) form.
Treatment and outlook vary, depending on the type of Castleman disease you have. The localized type can usually be successfully treated with surgery.
Sometimes associated with HIV infection, multicentric Castleman disease can be life-threatening. Multicentric Castleman disease is also associated with other cell-proliferation disorders, including cancer of the lymphatic system (lymphoma), Kaposi's sarcoma and POEMS syndrome.