Solitary Fibrous Tumor in the Orbit: A Rare Occurrence.

Solitary fibrous tumors (SFTs) of the orbit are exceptionally rare neoplasms. We present the case of a 77-year-old female who first presented in 2021 with a spindle cell neoplasm in the superior right orbit. Following surgical excision and a negative PET scan, she opted for surveillance without adjuvant radiation therapy. Three years later, MRI revealed a recurrence of the orbital SFT. The patient underwent a second surgical resection and adjuvant proton radiation therapy to reduce the risk of further recurrence. This case draws attention to the importance of long-term follow-up in orbital SFTs and highlights the potential role of targeted proton therapy for managing recurrent cases.