[A case of solitary endobronchial metastasis of prostatic cancer].

We report the case of a 67-year-old man found to have an abnormal chest shadow in February 2003, who was referred to our hospital in April 2003, and was admitted in July 2003 because of the expansion of this shadow. Chest radiography and CT on admission showed a small nodular shadow in the right S6. Bronchoscopy revealed a soft polypoid mass in the lumen of the right B6b ii, which was considered to be an endobronchial neoplasm. A CT scan performed as a routine screening was found to be abnormal and revealed a prostatic tumor that was diagnosed as adenocarcinoma by pathologic examinations of lung and prostate tissue. We confirmed the diagnosis of prostatic cancer and its endobronchial metastasis by immunohistological staining with prostate specific antigen (PSA). An endobronchial metastatic tumor arising from prostatic cancer is a rare phenomenon that appears on the chest radiograph as a solitary mass.