The patient was 69-year-old male with bronchogenic carcinoma associated with another abnormal shadow in the same left lower lobe. Its shadow was considered whether obstructive pneumonia or intrapulmonary metastasis before thoracotomy. Pathological examination revealed that this lesion was pulmonary infarction. It may be rare that bronchogenic carcinoma is associated with pulmonary infarction showing tumorous shadow. The staging and operative indication of lung cancer should be carefully determined which associate with abnormal shadow on the same lung field.
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