Two Cases of Endobronchial Metastasis from Rectal or Ureteral Cancer

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  • Endobronchial Metastasisを来した直腸癌と尿管癌の2例

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Background. Endobronchial metastases secondaries to extrapulmonary malignant tumors are rare. However, the increasingly widespread use of bronchial endoscopy has increased the number of reported cases. Case. An 82-year-old man with a history of surgical resection for rectal cancer 3 years earlier consulted our hospital with a chief complaint of coughing. A nodule measuring about 2cm in pulmonary right apex and a polypoid tumor extending from the trachea to the right main bronchus were detected. The histological examination demonstrated metastasis of rectal cancer. A 69-year-old man had undergone surgical resection for left ureteral cancer 8 months earlier. The patient was asymptomatic but multiple pulmonary nodules were apparent on the follow-up CT scan. Bronchial endoscopy demonstrated occlusion of the right B^8 by tumor, which was cytologically diagnosed as metastasis from ureteral cancer. These two cases were both diagnosed with endobronchial metastases, which is a rare form of metastatic lung tumor. The rectum is a common site of primary lesions, but to the best of our knowledge, this is the first report of endobronchial metastasis from ureteral cancer. Conclusion. We encountered 2 cases of endobronchial metastases. Bronchial endoscopy contributed to the differential diagnosis from primary lung cancer.

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