Related Experiment Videos
[Solitary fibrous tumor of the meninges]
A Gentil Perret1, J F Mosnier, R Duthel
1Service d'Anatomie et de Cytologie Pathologiques, CHU de Sainte-Etienne.
Abstract:
We report a case of solitary fibrous tumor (SFT) of the meninges. SFTs have been initially described in the pleura. SFTs show similar histological findings as in other locations. SFTs show a diffuse positive staining for vimentin and CD34. Meningeal SFTs have usually a favourable outcome. These tumors have to be essentially distinguished from hemangiopericytomas and fibrous meningiomas. Immunostaining for CD34 is of value for this purpose. CD34 expression is often patchy and weaker in hemangiopericytomas whereas it is rarely observed in fibrous meningiomas. It is of great interest to isolate SFTs from hemangiopericytomas because of their favourable outcome.
Insights
Solitary fibrous tumors (SFTs) in the meninges share histological traits with pleural SFTs and typically have a favorable prognosis. Distinguishing meningeal SFTs from hemangiopericytomas using CD34 immunostaining is crucial for patient outcomes.
Area of Science:
- Neuropathology
- Oncology
Background:
- Solitary fibrous tumors (SFTs) are rare mesenchymal neoplasms.
- Initially described in the pleura, SFTs can occur in various anatomical sites, including the meninges.
Observation:
- This report details a case of a solitary fibrous tumor (SFT) arising in the meninges.
- The meningeal SFT exhibited histological features consistent with SFTs found in other locations.
Findings:
- Histological analysis revealed diffuse positive staining for vimentin and CD34.
- Meningeal SFTs generally present a favorable clinical outcome.
- Immunostaining for CD34 is a key diagnostic marker, differentiating SFTs from hemangiopericytomas (patchy/weaker CD34) and fibrous meningiomas (rarely CD34 positive).
Implications:
- Accurate differentiation of meningeal SFTs from similar entities like hemangiopericytomas is critical.
- The favorable prognosis of SFTs underscores the importance of correct diagnosis for appropriate patient management and treatment planning.