Current Status and Future Prospects for System Calling Examinees to Have Further Lung Cancer Screening

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  • Kimura Tatsuo
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Fukumoto Shinya
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Morikawa Hiroyasu
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Nakano Akemi
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Tanaka Fumio
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Morisaki Tamami
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University
  • Kawada Norifumi
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University Department of Hepatology, Graduate School of Medicine, Osaka City University
  • Hirata Kazuto
    Department of Premier Preventive Medicine, Graduate School of Medicine, Osaka City University Department of Respiratory Medicine, Graduate School of Medicine, Osaka City University

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Other Title
  • 胸部要精密検査判定の現況と呼び出しシステムの活用
  • キョウブ ヨウ セイミツ ケンサ ハンテイ ノ ゲンキョウ ト ヨビダシ システム ノ カツヨウ

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Abstract

Objective: Chest X-ray is the most common screening procedure for detection of lung cancer. They play a significant role in both private and public health screening programs. However, if subjects have old inflammatory shadows, such as those due to tuberculosis, this will make it difficult to detect lung cancer. <br>Methods: Our clinic, MedCity21, was established as an outpatient clinic to provide complete health check-ups aiming at pre-emptive preventive medicine. Examinees with abnormalities detected in chest X-rays are announced by our calling system and invited to our clinic for further examinations (exams). Here, we report the chest X-ray results for the complete health check-ups. <br>Results: 5,603 subjects who underwent private health screening programs including chest X-ray exams at our clinic between January 1st and December 31st 2015 were enrolled in this study. Abnormalities were detected in X-rays for 230 (4.1%) individuals and 174 (76%) of them underwent a chest CT scan at our clinic. Abnormal shadows, including those for 106 nodules and 17 ground glass opacities, were detected in 156 (89.7%) of these examinees. Four examinees were diagnosed as lung cancer within 12 months of the health check-up. The lung cancer detection rate was 0.07%. The standardized detection ratio: “number of individuals with detected lung cancer” divided by “expected lung cancer presence” was 1.02.<br>Conclusions: Chest CT scans clarified the details of abnormal lung shadows in 174 examinees. Our findings may contribute to the early prevention and treatment of lung cancer.

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