Incidence of Double Cancer Including Lung Cancer among Autopsied Patients with Malignant Neoplasms.

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  • 剖検症例における肺癌を含む重複癌の検討

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Abstract

We investigated double cancer in 1, 516 patients with malignant neoplasms, including 359 with lung cancer and 1, 157 with non-pulmonary malignant neoplasm, autopsied at Tenri Hospital between 1966 and 1986. Double cancer was found in 90 of these 1, 516, in 38 (10.6%) of the lung cancer patients and 52 (4.5%) of patients with non-pulmonary neoplasms. The incidence of double cancer including lung cancer was significantly higher than that of double cancer without lung involvement (< 0.01, X2 test). Cancers that accompanied lung cancer included prostatic cancer (12, including 9 with occult cancer), gastric cancer (11), pulmonary double cancer (7), malignant lymphoma (3) and others. The age and male-female ratio tended to be higher among lung cancer patients with double cancer than among all lung cancer patients. In terms of histologic type of lung cancer, no significant difference was noted between lung cancer patients with double cancer and all lung cancer patients. Analysis of background variables revealed that in 2 (28.6%) of the 7 patients with pulmonary double cancer the cancer had been complicated by idiopathic interstitial pneumonia. Of the 38 lung cancer patients with double cancer including lung cancer, double cancer was detected in 19 at postmortem examination.<BR>Although the second cancer was frequently subclinical in the present study, the higher incidence of double cancer among autopsied patients with lung cancer indicates the necessity for special attention to the possibility of double cancer in the diagnosis and treatment of lung cancer.

Journal

  • Haigan

    Haigan 31 (3), 359-365, 1991

    The Japan Lung Cancer Society

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