A 6-YEAR-OLD girl presented with a history of 2 episodes of transient epigastric and upper right abdominal pain associated with fever and vomiting. She was previously healthy. During the last episode of abdominal pain, she was referred for evaluation. Findings from physical examination were normal. No mass was present, and the liver was normal in size. Her white blood cell count, C-reactive protein level, and erythrocyte sedimentation rate were slightly increased, but returned spontaneously to reference values in a few days. γ-Glutamyltransferase was increased to 3-fold the reference level. Findings from other liver function tests as well as levels for serum α1-fetoprotein and pancreatic enzyme were normal. Abdominal ultrasonography (Figure 1), computed tomography without and with contrast enhancement (Figure 2), and magnetic resonance imaging (Figure 3) were performed.