Abstract
A 65-year-old man complained of bloody sputum six months after radical nephrectomy due to renal cell carcinoma. Bronchoscopy revealed no abnormal finding. Nine months later, bronchoscopic findings showed a polypoid tumor arising from left B^8 bronchus and transbronchial biopsy revealed metastasis from the renal cell carcinoma. Left lower lobectomy of the lung was performed because of a solitary pulmonary metastasis and continuing bloody sputum. Examination of the resected specimen revealed two other small lesions in S^6 and S^<10> which were direct endobronchial metastases identical to the B^8 tumor. Multiple endobronchial metastases of renal cell carcinoma are rare without metastasis to the pulmonary parenchyma or other organs. Endobronchial metastasis which may not be found by bronchoscopic observation should be kept in mind in case of bloody sputum appearing after resection of renal cell carcinoma.
