[Retroperitoneal xanthofibrogranulomatosis].

Retroperitoneal xanthofibrogranulomatosis has so far been reported less than 50 times in the world literature. It has not been classified with retroperitoneal fibrosis or neoplasia. The clinical, radiological and histological features, and the problems of diagnosis, are discussed with reference to another case. The classification of the condition is considered in relation to the available literature. Diagnosis and possible treatment are also discussed.