An 81-year-old Caucasian lady studied for anaemia presented with a large solid enhancing mass arising from the hilum of the left kidney on computed tomography scan. A laparoscopic left radical nephrectomy was done through a retroperitoneal approach. Microscopy and histochemistry classified it as Rosai–Dorfman disease though there was neither lymphadenopathy anywhere nor lymphocytosis. It was a very unusual urological presentation of a rare disease.
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Competing interests: none.