Xanthogranulomatouspyelonephritis and staghorn calculus are rare in children.
黄色肉芽肿肾盂肾炎和鹿角石皆罕见于儿童。
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The CT features of Xanthogranulomatouspyelonephritis(XGP)include multiple, rounded, low density areas with enhancing rings arranged in a hydronephrotic pattern known as bear paw sign.
黄色肉芽肿性肾盂肾炎（XGP）的特征是CT示群集的类圆形的低密度区以及环形增强带形成“熊掌征”；
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Objective: to discuss the clinical pathology characteristic and pathogenesis of XanthogranulomatousPyelonephritis (XGP). So that the preoperative diagnosis rate could be improved.