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Unexpected long‐term survival after low‐dose palliative radiotherapy for nonsmall cell lung cancer

Many experienced oncologists have encountered patients with proven nonsmall cell lung cancer (NCLC) who received modest doses of palliative radiotherapy (RT) and who unexpectedly survived for > 5 years; some were apparently cured. We used a very large prospective database to estimate the frequency of this phenomenon and to look for correlative prognostic factors.