Abstract
We report a 6-year-old boy with acute focal bacterial nephritis (AFBN). He was referred to us for high fever, abdominal pain, and diarrhea. His abdominal ultrasonogram showed nephromegaly and high echogenic mass in the upper and lower pole of the left kidney. Post-contrast computed tomography showed wedge-shaped mass like hypodense lesions. The diagnosis was AFBN for which he was treated with parenteral cefpirome sulfate. He recovered and discharged without sequela. Follow-up sonographies were performed and showed the change of echogenisity of the mass from high echogenic to hypoechogenic. Our serial observation suggests that the sonographic appearance can alter with the time course of the infective process or during the period of antibiotic treatment.
