The CT features of Xanthogranulomatous pyelonephritis(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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It has been rounded on a wheel. It is made of fine baked clay, and is neatly ornamented with a simple pattern.