Laparoscopic approach of Castleman's disease in the pararenal retroperitoneum: report of two cases

Castleman's disease (CD) is a benign lymphoid neoplasm characterized by massive proliferation of the lymphoid tissue due to an uncertain cause.1 Two clinical types (localized, multicentric) have been described with three histological variants (hyaline-vascular, plasma cell and mixed type). The expected localization is mediastinum and rarely pararenal retroperitoneum.