Hepatic abscess is rare in children. A patient with a post-traumatic hepatic abscess was successfully treated by ultrasound-guided percutaneous drainage. Although he underwent a drainage operation for the perihepatic abscesses, high fever continued. It was then considered that the traumatic hematoma had been infected and had become an abscess. Sonographically-guided percutaneous aspiration is useful for the definite diagnosis of hepatic abscess. Subsequent percutaneous drainage under ultrasound imaging is a safe and useful therapeutic method even in a poor-risk patient.
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