[Solitary fibrous tumor of the bronchus; report of a case].

A 69-year-old woman was referred to our hospital due to an abnormal shadow on a chest roentgenogram. Computed tomographic scanning revealed a complete atelectasis of the left lower lobe. Though the definitive diagnosis was not obtained preoperatively, we performed a left lower lobe excision because atelectasis existed for more than one year. Immunohistochemical staining showed that tumor cells were positive for vimentin, CD34, bcl-2, CD99, and negative for S-100, α-smooth muscle actin. The tumor was diagnosed as a solitary fibrous tumor of the bronchus, which has been rarely reported to date.