Lung cancer with p53 expression and a solitary metastasis to the stomach: a case report.

Lung cancer with a solitary metastasis to the stomach occurred in a 65-year-old man, surgically treated for gastric metastasis was followed by pulmonary resection. The gastric metastasis accompanied by upper gastrointestinal hemorrhage. After total gastrectomy to control this hemorrhage, a left lower lobectomy with a partial resection of the lingular segment and combined resection of the chest wall were done. Histopathological features of both the primary tumor in the left lower lobe and the gastric tumor were poorly differentiated adenocarcinoma, and showed the same immunoreactivities of p53 protein, carcinoembryonic antigen and keratin. These results indicate that the gastric tumor was a metastasis originated from the lung cancer.