[Clinical study of asymptomatic microhematuria]

A statistical survey was performed on 200 patients with asymptomatic microhematuria who visited our hospital between January 1986 and October 1989. Urinalysis, urinary cytology, urinary culture, IVP, echography and cystoscopy were carried out for the evaluation of the origin and nature of the microhematuria. In 92 patients (46%), urological abnormalities were observed. Among them, urological lesions requiring medical and surgical treatments were found in 28 patients (14%) including two malignant cases of bladder tumor. No urologic lesion could be identified in 108 patients (54%). The degree of hematuria was unrelated to the seriousness of its cause. Thirteen of 28 patients (46%) with diseases that required treatment had under 5 red blood cells per high power field on the microscopic urinalysis. Therefore, complete urologic investigation of all patients with any degree of asymptomatic microhematuria is recommended.