A case of incidentally detected Castleman's disease with retroperitoneal paravertebral localization

Castleman's disease. or angiofollicular lymph node hyperplasia, is a fairly rare benign tumor of lymphoid origin. The expected localization is mediast inum and rarely retroperitoneum. An asymptomatic case is reported with mult imodality imaging and postoperative findings. The lesion was detected incid entally on routine chest radiogram. Surgical exploration revealed a retrope ritoneal mass and the mass was resected successfully through a thoracoabdom inal flank incision. Castleman's disease should be included in the list of differential diagnosis of retroperitoneal masses which are mostly malignant tumors.