Strategies for Asymptomatic Microscopic Hematuria: A Prospective Study of 1,034 Patients

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Abstract
To establish strategies for treatment of asymptomatic microscopic hematuria we conducted a prospective study of 1,034 patients with this disease. The patients were examined by cystoscopy, urine cytology, abdominal ultrasound and excretory urography. On initial examination 30 highly significant lesions, including 24 cases of urological malignancies, 195 moderately significant lesions and 246 insignificant lesions were detected. In the remaining 563 patients no underlying lesion could be found. Of the 246 patients with insignificant lesions and 563 with unexplained asymptomatic microscopic hematuria followup was done in 421 at 6-month intervals for more than 1 year. A diagnosis became clear within 3 years in 22 patients, including 3 cases of bladder carcinoma and 1 of prostatic carcinoma.