Journal of Clinical Oncology, Vol 13, 101-111, Copyright © 1995 by American Society of Clinical Oncology

ARTICLES

Risk of second aerodigestive cancers increases in patients who survive free of small-cell lung cancer for more than 2 years

BE Johnson, RI Linnoila, JP Williams, DJ Venzon, P Okunieff, GB Anderson and GE Richardson
Navy Medical Oncology Branch, National Cancer Institute, National Naval Medical Center, Bethesda, MD 20889-5105.

PURPOSE: Patients who survived small-cell lung cancer (SCLC) for more than 2 years were evaluated to determine the frequency and anatomic pattern of redevelopment of small-cell cancer and development of non- small-cell lung cancer (NSCLC) and aerodigestive cancers with the passage of time. PATIENTS AND METHODS: From April 1973 through December 1991, 578 patients with previously untreated SCLC were entered onto prospective therapeutic trials at the National Cancer Institute (NCI), Bethesda, MD. Sixty-two (11%) were cancer-free 2 years after initiation of therapy and were assessable for redevelopment of SCLC and development of NSCLC, and aerodigestive cancers. RESULTS: Twenty patients redeveloped SCLC 2.0 to 12.2 years after initiation of chemotherapy, of whom two patients were deemed to have a second primary small-cell cancer that involved the aerodigestive tract. Fifteen patients developed 16 cancers in the lung other than SCLC 3.4 to 14.9 years after initiation of therapy. Two developed other aerodigestive cancers that involved the larynx and lip. The risk of a NSCLC and aerodigestive cancer in these patients increased more than sixfold from 2% per patient per year during years 2 to 4 to 12.6% and 14.4%, respectively, after more than 10 years. The cumulative actuarial risk of a second primary NSCLC or aerodigestive cancer at 16 years is 69% and 72%, respectively. CONCLUSION: The increasing risk of second aerodigestive cancers with the passage of time is a mounting problem for patients cured of SCLC. Chemoprevention trials for these patients should be considered.
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