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Vol.40 No.1 contents | Japanese/English |
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- Original Article -
Analysis of Metastatic Lung Tumor Detected by Mass Screening
Hiroshige Nakamura1,2, Takeshi Yamaga1, Yoshifumi Nakamura1, Satoru Morio1, Takao Sasaki1,3 and Shigetsugu Ohgi21Tottori Prefecture Health Promoting Council, Lung Cancer Committee, 2Second Department of Surgery, Tottori University, Faculty of Medicine, 3Rosai Hospital for Silicosis
Objective and Methods: Clinical characterization and prognosis of metastatic lung tumor detected by mass screening in Tottori prefecture from 1987 to 1998 were analyzed. Results: There were 47 cases of metastatic lung tumor, which originated from colon cancer in 15, breast cancer in 5, thyroid cancer in 5, renal cell cancer in 5 and so on. In 13 cases (27.7%), the primary site was initially determined following mass screening. Overall survival rate was 22.8% at three years and 15.2% at five years. Univariate analysis showed significantly better outcome for both surgically treated cases and women. Cases not receiving mass screening the previous year and cases with solitary metastasis tended to show a good prognosis. Multivariate analysis using Cox's proportional hazards model also showed surgically treated cases and female cases had a significantly better prognosis. Conclusion: Metastatic lung tumor detected by mass screening originated from various organs and showed significantly better outcome in surgically treated cases and female cases.
key words: Metastatic lung cancer, Mass screening, Multivariate analysis
Received: October 29, 1999
Accepted: December 20, 1999
JJLC 40 (1): 29-32, 2000
