[Retroperitoneal ganglioneuroma. Apropos of a case].

Ganglioneuroma is a rare tumour in adults. We report the case of a 26-year-old woman admitted in our department with right renal colic. Ultrasonography and computed tomography showed a heterogeneous retroperitoneal mass measuring 8 x 7 cm in diameter and displacing the ureteropelvic junction and right kidney anteriorly and laterally. The preoperative diagnosis was retroperitoneal tumour. Surgical exploration revealed a totally resectable retroperitoneal tumour with a histological diagnosis of ganglioneuroma.