[Non-small cell lung cancer metastatic to the stomach and the jejunum causing intussusception: a case report].

We report a case of lung cancer metastatic to the stomach and the jejunum. Adenocarcinoma of the lingula (T 4 N 2 M 0) was diagnosed in a 45-year-old man, who then underwent chemoradiotherapy. Bowel obstruction later developed due to jejunal metastasis. Another metastasis was detected in the stomach. Laparotomy revealed jejuno-jejuno-jejunal intussusception caused by the two lesions. The jejunal and gastric lesions were identified as metastatic large cell carcinoma arising from the lung. One month postoperatively, the patient died due to disease. The literature has demonstrated that large cell carcinoma of the lung tends to metastasizes. However, the complex bowel invagination and gastric metastasis seen in our case are rare.