title: Bilateral retroperitoneal xanthogranuloma.
mesh_terms: D006099:Granuloma / Q000150:complications* / Q000473:pathology; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012187:Retroperitoneal Space; D014973:Xanthomatosis / Q000150:complications* / Q000473:pathology