Renal abscess in previously healthy girl.

We describe the case of a previously healthy 11-year-old girl with a Staphylococcal aureus renal abscess. The diagnosis was confirmed by renal ultrasonography and abdominal computed tomography. We emphasize the need to obtain an abdominal ultrasound scan and computed tomography scan in patients with abdominal or flank pain, and laboratory evidences of infection to avoid diagnostic and therapeutic delays.