Castleman's disease presented as a retroperitoneal mass.

Objective: We report one case of Castleman's disease and review published literature.
Methods: We report the case of a 58 year old man who was referred to our institution because of lumbar pain. A computed tomography scan revealed a retroperitoneal mass. Open surgical exploration and excision were carried out. Finally pathological examination addressed the diagnosis.
Results: Pathological examination demonstrated findings characteristic of unicentric hyaline vascular type of Castleman's disease. After surgical excision and 12 months follow-up there is no evidence of recurrence disease.
Conclusions: Castleman's disease is a rare lymphoproliferative disorder of uncertain etiology. Retroperitoneal localization is exceptional.