Abstract
Simultaneous pulmonary metastases from different primary tumors to the same lobe are extremely rare, and we herein report the case. Surgical specimen of the pulmonary metastasis from colon cancer contained two additional nodules that were confirmed as metastases from prostate cancer. Pulmonary metastasis from prostate cancer rarely forms nodules, and there is a discrepancy in the incidence of pulmonary metastases between autopsy and clinical findings. This case suggests that different malignant tumors could simultaneously metastasize to the same pulmonary lobe, and more pulmonary metastases from prostate cancer might exist than expected.
Highlights
Pulmonary metastasectomy plays an important role in selected patients and is widely performed, especially in colorectal cancer patients
Thereafter, as it was suspected that the lung nodule was metastasis from colon cancer, he underwent left upper lobectomy with hilar lymph
The clinical significance of pulmonary metastasectomy in prostate cancer has not been established. This is because most pulmonary metastases from prostate cancer reveal lymphangitic spread, not nodules as in the present case, and are usually concomitant with bone metastases
Summary
Pulmonary metastasectomy plays an important role in selected patients and is widely performed, especially in colorectal cancer patients. Case presentation A 76-year-old man showed a solitary lung nodule on computed tomography (CT) (Figure 1A) 5 years after Hartmann colostomy for a perforated T3N0 colon cancer. He had undergone liver metastasectomy from colon cancer 1 year prior. Thereafter, as it was suspected that the lung nodule was metastasis from colon cancer, he underwent left upper lobectomy with hilar lymph. Antiandrogen therapy was continued without any cytotoxic therapy for colon cancer. He died of acute cardiac failure 2 years after pulmonary lobectomy with undetectable serum PSA level (
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