摘要
血尿是臨床上常見的症狀，其中顯微血尿有幾種可能原因，如何診斷是需要靠詳細病史、藥物史、理學、實驗室或影像學檢查所獲得。尤其在男性年齡超過35歲、有吸菸史或特定職業接觸史者會增加泌尿道惡性腫瘤的機會的風險；因此，發現持續存在無症狀顯微血尿時必需做進一步檢查。本文討論無症狀顯微血尿的定義、病因、危險因子、評估及診斷流程，並且回顧近年來相關的醫學文獻研究及臨床指引，以提供完整之評估方式、依據及診斷流程。
並列摘要
Hematuria is a common clinical sign and can be gross or microscopic. There are several possible causes of microscopic hematuria. There is increased risk of genitourinary malignancy in subjects with asymptomatic microscopic hematuria (AMH), especially in men over 50 years old or with smoking and specific occupational exposure. Therefore, we need to obtain thorough personal history, drug history, physical examination, urine analysis and image studies for further diagnosis. In this review, we focus on the definition of AMH, etiologies, risks factors and propose an approach for the evaluation of AMH.