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The development of small cell lung cancer in the contralateral lung of a patient surviving 8 years after the original diagnosis of small cell lung cancer

The development of non‐small cell lung cancer in patients successfully treated for small cell lung cancer has been previously described. Many of these non‐small cell tumors appear to be second primary lung tumors. However, the development of second primary small cell lung cancers has not been clearly delineated. In this report, a patient with limited stage small cell lung cancer who had a complete response to chemotherapy plus chest radiotherapy and remained cancer‐free for 8 years is described. Small cell lung cancer developed in this patient's contralateral lung with no evidence of recurrence at the original primary site. Clinical evidence suggests that a second primary small cell lung cancer developed in this patient.