Castleman's disease masquerading as an adrenal tumor

Castleman's disease is a rare disorder characterized by benign proliferation of lymphoid tissues. Most cases occur as mediastinal masses, although extrathoracic involvement, including nodal and extra nodal locations, has been reported. The pararenal location of localized disease may sometimes be mistaken for adrenal or renal tumor. We report on a 25-year-old male with Castleman's tumor located superomedially to the upper pole of the right kidney mimicking the suprarenal mass.