Castleman disease (CD) is a rare disorder characterized by the overgrowth of cells in the body's lymphatic system. It is also known as angiofollicular lymph node hyperplasia. This disease manifests in two forms: Unicentric Castleman Disease (UCD), which affects a single lymph node region, and Multicentric Castleman Disease (MCD), which involves multiple lymph node regions and can be associated with systemic symptoms.
