Solitary fibrous tumor
![](/Images/godic/202502/12/Solitary_fibrous_tumour_intermed_mag3628.jpg")
![This PA chest radiograph demonstrates an abnormal contour in the right hilar region, with visualization of the pulmonary vessels through the mass (the hilar overlay sign) indicating its posterior mediastinal location. On resection this was found to be a benign solitary fibrous tumor of the pleura.](/Images/godic/202502/12/Chest_radiograph_showing_fibrous_tumor_of_the_pleura3628.jpg")
![This axial CT image with intravenous contrast (same patient as in the above chest radiograph) reveals what appears to be a posterior mediastinal mass, which was surgically removed and found to be a solitary fibrous tumor of the pleura.](/Images/godic/202502/12/CT_showing_fibrous_tumor_of_the_pleura3628.jpg")
Solitary fibrous tumor (SFT), also known as fibrous tumor of the pleura, is a rare mesenchymal tumor originating in the pleura or at virtually any site in the soft tissue including seminal vesicle. Approximately 78% to 88% of SFT's are benign and 12% to 22% are malignant.