Possible role of radiotherapy in the management of orbital solitary fibrous tumors

As solitary fibrous tumors (SFT) are rare orbital neoplasms, the role of radiotherapy in their management remains unclear. We report three SFT cases who underwent radiotherapy for different clinical scenarios. Case 1 was a 20‐year‐old woman who presented with a 2‐year history of worsening left eye proptosis, eventually leading to its enucleation. A histopathological diagnosis of SFT was established. Recurrence was noted after 3 months and was partially resected, as limited by its location and extent. The residual tumor was given 60 Gy through three‐dimensional conformal radiotherapy. Case 2 was a 23‐year‐old man who had been experiencing painless right eye proptosis for 8 months before undergoing excision, which revealed a diagnosis of SFT. With no residual mass detected on imaging, 54 Gy was delivered to the postoperative bed through intensity‐modulated radiotherapy. Case 3 was a 49‐year‐old man with a 3‐year history of blurred vision and left eye proptosis who underwent subtotal resection, which revealed a diagnosis of malignant SFT. A dose of 64 Gy was delivered to the residual tumor through intensity‐modulated radiotherapy. Grade 2 dermatitis was noted. No worsening in vision was observed. The patients remained recurrence‐free after 18, 12, and 5 months, respectively. Radiotherapy might provide a high tumor control probability in orbital SFT.