[Extra-renal retroperitoneal angiomyolipoma]

Angiomyolipoma is a benign kidney tumour. Its extrarenal, retroperitoneal site is exceptional. The authors report a case and emphasise the value of ultrasonography and computed tomography in the diagnosis of these tumours with a marked fatty component, without neglecting the contribution of arteriography which can be useful in the diagnosis of the origin of very large retroperitoneal tumours.