title: Microhematuria found by mass screening of apparently healthy males.
abstract: Preparation of urinary sediments was adapted for mass screening purposes. The procedure, characterized by most careful collection and transfer of the sediment and by a rigidly controlled work scheme, was tested in a limited population screening program with 446 healthy male participants. A capacity of 100 samples per 12 manhours was achieved. The procedure was found effective in collecting the cellular content, but there was serious cytolysis due to a 11 hours delay between micturition and processing. An unexpected finding was the presence of erythrocytes in all the samples. In 8.8 per cent of the smears more than ten RBC/hpf were present. The significance of this feature is still in study, but it might prove to be a useful prescreening criterion in the cytologic assessment of bladder cancer in large populations.
mesh_terms: D006417:Hematuria / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008403:Mass Screening; D001749:Urinary Bladder Neoplasms / Q000097:blood / Q000453:epidemiology*; D014556:Urine / Q000166:cytology*