Abstract
AbstractDuodenal metastases from lung adenocarcinoma are extremely uncommon, and rarely produce symptoms. We report a case of duodenal metastasis from primary lung adenocarcinoma presented with history of gastroesophageal reflux disease, superficial gastritis, and chemotherapy‐related grade I fatigue. Tumor cells showed immunopositivity for cytokeratin‐7 (CK7), thyroid transcription factor 1, and immunonegativity for CK20, CDX2, and synaptophysin, supporting the diagnosis of metastatic adenocarcinoma of the lung origin.
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