Surgical Management of Asymptomatic Posterior Mediastinal Solitary Fibrous Tumor

Primary Treatment Approach

Complete surgical resection with negative margins is the definitive treatment, providing the best chance for cure and long‑term disease control in solitary fibrous tumors. 1, 2
Excision should be performed by a surgeon with sarcoma expertise, aiming for a single‑specimen, en‑bloc removal with negative margins while preserving uninvolved organs. 1, 2
The 2025 UK guidelines state that retroperitoneal solitary fibrous tumors have a low risk of local recurrence; therefore the goal is complete resection with negative margins and organ preservation. 1
The tumor must be resected en‑bloc with any adherent structures, even if not overtly infiltrated, to achieve macroscopically complete resection and minimize microscopically positive margins. 2
Grossly incomplete resection should be avoided because it offers questionable benefit and may be harmful. 2

Solitary fibrous tumors exhibit radiation sensitivity; this should be factored into pre‑operative planning. 1, 2
Neoadjuvant radiotherapy is not standard but may be considered in a multidisciplinary sarcoma tumor board for technically challenging cases. 2
All cases should be reviewed at a multidisciplinary sarcoma case conference to create an individualized management plan based on imaging and pathology. 2
Early definitive surgery offers the best chance of cure at the time of primary presentation. 2

Post‑operative radiotherapy after complete resection provides limited benefit and carries significant toxicity; it should be reserved for selected patients with a well‑defined area at risk for local recurrence. 1

Long‑term follow‑up must include clinical evaluation and cross‑sectional imaging, with MRI preferred for soft‑tissue characterization. 1
Surveillance intervals may be every 3–6 months initially, then annually after five years. 1
Cross‑sectional imaging can detect asymptomatic recurrences long before clinical symptoms appear. 1