lymphatic system disorder Giant Lymph Node Hyperplasia Dani Welter Large benign, hyperplastic lymph nodes. The more common hyaline vascular subtype is characterized by small hyaline vascular follicles and interfollicular capillary proliferations. Plasma cells are often present and represent another subtype with the plasma cells containing IgM and IMMUNOGLOBULIN A. MESH:D005871 SNOMEDCT:238809002