Etiology of asymptomatic microscopic hematuria in adults

Abstract

無症候性顕微鏡的血尿で, 泌尿器科的精査を行った40歳以上の236例のうち, 6.8%に尿路性器癌が発見され, 27.5%に重篤な泌尿器疾患が見いだされた。52.1%の症例においては, 顕微鏡的血尿の原因が不明であった。13.6%の症例において, 重篤ではない泌尿器疾患が見いだされた。40歳以下の72例中16例に異常所見が認められた。これらのうち, 膀胱鏡検査により疾患が発見されたのは, 1例であった。従って若年者に対する膀胱鏡検査はほとんど価値がない。明らかな基礎疾患が見いだされなかった場合は, 三ヵ月ごとに尿検査と尿細胞診を行うことにしている

Asymptomatic microscopic hematuria is a common finding that demands urologic evaluation. Of the 236 patients over the age of 40, 6.8% were found to have a genitourinary cancer, while 27.5% had other significant urologic disease. However, 52.1% of the patients had unknown etiology of microscopic hematuria and 13.6% had insignificant urologic lesions. Of the 72 patients under the age of 40 a positive diagnosis was made in 16 patients (22.2%). Cystoscopic examination was of diagnostic value in only 1 patient. Therefore, cystoscopy is of little diagnostic value in young patients. Once asymptomatic microscopic hematuria is established and no etiological cause is identified, we follow the patient by urinalysis and cytology every three months and reevaluate the patient in whom urological symptoms develop.