[A case report of splenic abscesses due to pyonephrosis].

We report a rare case of splenic abscesses that were derived from left pyonephrosis. A 58-year-old woman was referred to our hospital with complaints of fever and epigastralgia. Computed tomography revealed splenic abscesses and left pyonephrosis with staghorn calculi. After admission, her condition improved with conservative therapy. Eight months later, the splenic abscesses had disappeared. The patient was then readmitted and left nephrectomy was performed to prevent relapse of the splenic abscesses. We suspected that direct invasion of inflammation from the left pyonephrosis caused the splenic abscesses, as her left kidney had adhered to the spleen. Only one case of splenic abscesses derived from a urinary tract infection has been reported in Japan.