Herein, we report2 cases: a case of lung cancer with the initial presentation of small bowel perforation, and a case of known lung cancer with the presentation of gastrointestinal bleeding due to gastric metastasis; a literature review is also included.

• 在此我们提出一位以小肠破裂为最初表现之肺癌，及一位已知肺癌而以消化道出血来表现之胃转移的病例，并回顾历年来与此种病历相关的文献报告。