Accessory spleen presenting as a retroperitoneal tumour.

We report the case of accessory spleen presenting as a retroperitoneal mass in close relation to the upper pole of the kidney. The considerable number of investigations and their operative sequel were motivated by the patients symptoms of haematuria and loin pain. These problems both had other simple explanations. Accessory spleen should always be considered by the urologist when investigating a retroperitoneal mass, even when the patients has already had a splenectomy.