Solitary fibrous tumor of the pleura
- Most patients are asymptomatic
- The lesion is usually discovered incidentally on chest radiographs.
- The tumor may become large, occupying much of the hemithorax.
- When present, symptoms are usually related to the local mass effect of large lesions or to the associated paraneoplastic phenomena.
- Paraneoplastic manifestations include hypertrophic osteoarthropathy and hypoglycemia.
- Surgery is usually curative.
- Formerly named "benign solitary fibrous tumor of the pleura" but named changed as some of these lesions are malignant.
 Imaging Findings
- Typically demonstrate a well-defined solitary peripheral mass,
- Typically demonstrates well-defined lobular borders, acute angles with the adjacent pleural surfaces, and heterogeneous enhancement after contrast administration.
- Calcification is seen in approximately 25% of cases.
- Heterogeneous signal intensity on both T1- and T2-weighted images.
- May show internal flow voids corresponding to the vascular nature of the tumors.