Pancreatic adenocarcinoma with distant metastases is an extremely challenging diagnosis. We report on a 74-year-old man with early stage lung cancer who had previously received a curative operation. Subsequent pancreatic cancer developed one year later. A curative operation for pancreatic cancer was then performed, but rapid tumor recurrence with multiple metastatic sites were identified soon after the operation. The patient was treated with several lines of chemotherapy but progressive disease persisted until erlotinib-combined chemotherapy was undertaken. Then the patient maintained a durable response to erlotinib and capecitabine for nearly 2 years. We reviewed the relationship between K-RAS mutation and the efficacy of erlotinib on pancreatic adenocarcinoma.
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