We report of a patient with metastatic adenocarcinoma of the esophagus and stomach from lung cancer. The patient was a 68-year-old man receiving radiotherapy and chemotherapy for stage IV lung cancer, without metastases to the gastrointestinal (GI) tract at the time of the initial diagnosis. During the treatment period, dysphagia and melena newly developed. Upper GI endoscopy revealed geographic erosion at the distal esophagus and multiple volcano-shaped ulcers on the stomach body. Endoscopic biopsy was performed for each lesion. To determine whether the lesions were primary esophageal and gastric cancer masses or metastases from the lung cancer, histopathological testing including immunohistochemical staining was performed, and metastasis from lung cancer was confirmed. The disease progressed despite chemotherapy, and the patient died 5 months after the diagnosis of lung cancer. This is a case report of metastatic adenocarcinoma in the esophagus and stomach, which are very rare sites of spread for lung cancer.

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