Castlemans disease, also known as angiofollicular or benign giant lymph node hyperplasia, is an uncommon benign lymphoproliferative disorder [1-3]. Pathologically, two major histologic types are recognized: the hyaline-vascular type and the plasma cell type. The hyaline-vascular type (Fig. 1), accounting for approximately 90% of cases, is characterized by germinal follicles with hyalinized vessels surrounded by concentric layers of small lymphocytes with proliferative interfollicular vascular stroma.