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H. Maezawa



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    P2.20 - Poster Session 2 - Early Detection and Screening (ID 173)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Imaging, Staging & Screening
    • Presentations: 1
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      P2.20-009 - Early detection of mediastinal tumors using low-dose spiral computed tomography. (ID 3241)

      09:30 - 09:30  |  Author(s): H. Maezawa

      • Abstract

      Background
      BACKGROUND: Chest radiographic screening is a commonly used conventional method for the detection of lung and mediastinal tumors. However, more than half of the tumors detected by chest radiography are those that have already progressed to the advanced stage. Recent studies have shown that low-dose spiral computed tomography (CT) is effective for the early stage detection of lung cancer, and this facilitates better resectability and long-term survival. The present study was performed to evaluate the usefulness of chest radiography and spiral CT in the diagnosis of mediastinal tumors.

      Methods
      METHOD: More than 50000 consecutive asymptomatic individuals had undergone a health check-up at our institution during a 1-year period (from December 2011 to November 2012). Of these individuals, approximately 45000 had undergone chest radiography or low-dose spiral CT. The presence of mediastinal tumors was investigated in these individuals.

      Results
      RESULTS: Five mediastinal tumors were detected (2 thymoma, 1 teratoma, 1 liposarcoma, and 1 neurofibroma with Recklinghausen’s disease). Two cases were detected using both chest radiography and CT, whereas the other 3 were detected using chest CT only. In these 3 cases, no abnormal opacity was observed on chest radiographs. The tumors in all 5 cases were successfully resected, and to date, no tumor recurrence has been observed.

      Conclusion
      CONCLUSION: These results suggest that screening using low-dose spiral CT is more useful than chest radiography and might contribute to the early detection and treatment of mediastinal tumors, although further studies to confirm of these findings will be needed.