To report the gross and histopathological postmortem findings of the urinary tract and compare them to clinical severity of disease in cats with urethral obstruction (UO).

中文翻译：

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患有尿道阻塞的猫的验尸后尿路变化。

报告尿路的大体和组织病理学尸检结果，并将其与患有尿道梗阻（UO）的猫的疾病临床严重程度进行比较。