[Intrapulmonary Solitary Fibrous Tumor;Report of a Case].

An abnormal lung shadow was detected in a 39-year-old woman at physical examination and she was followed-up carefully at a nearby hospital. After 5 years follow-up, the patient was referred to our hospital for further examination of the abnormal shadow. A chest computed tomography(CT) scan revealed a 12 mm well-circumscribed nodular shadow in the right lower lobe. A benign tumor such as a hamartoma was suspected preoperatively;video-assisted thoracic surgery was performed for both diagnosis and treatment. Partial resection of the right lower lobe was performed and the tumor was diagnosed as an intrapulmonary solitary fibrous tumor (SFT). No malignant features, such as nuclear atypia, necrosis, or mitotic activity, were identified. Careful observation will be necessary, because a few SFTs have a propensity to recur or metastasize. The post-operative course was uneventful and there has been no recurrence at 7 years after surgery.