Trend of Incidence in Positive Cervical Smears from 2002-2010 in Ningen Dock, a Special Japanese Health Check-up System

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Background The present study aimed to determine the gynecologic health status of asymptomatic women examined in Ningen Dock, a special Japanese health check-up system. Methods Medical records of Japanese women who underwent gynecological examinations between February 2002 and September 2010 were retrospectively reviewed.Results Of the cervical smears from 7,585 women aged 18-82 years, 91 (1.2%) were classified as dysplastic and malignant changes: 81 given the designation low-grade squamous intraepithelial lesion (LSIL), 4 high-grade squamous intraepithelial lesion (HSIL), 2 atypical squamous cells of undetermined significance (ASC-US) and 4 cervical squamous cell carcinoma. No case of cervical adenocarcinoma was found. Ultrasonographic examinations detected uterus enlargements and ovary tumors in 7.7 and 2.4 % of the subjects, respectively. Most of them (85.7 %) revealed no gynecologic abnormalities.Conclusion In the present study, which was based on the records from Ningen Dock where asymptomatic persons undergo a medical examination at their own expense, the incidences of abnormal cytologic and/or ultrasonographic findings were very low.