Purpose

Solitary fibrous tumor (SFT) is an uncommon fibroblastic spindle cell neoplasm classically arising in the pleura, but increasingly recognized in extrapleural locations, including the orbit. The objective of this e-poster is to present a well-documented case of orbital SFT in a 50-year-old male patient, emphasizing clinical presentation, imaging characteristics, histopathological findings, and surgical outcomes.

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Methods

We report a single observational case of a 50-year-old male with a history of vitiligo who presented with progressive right orbital swelling and conjunctival hyperemia over a 5-month period. A comprehensive ophthalmologic examination was performed. Orbital imaging was conducted using both non-contrast and contrast-enhanced computed tomography (CT). The patient underwent complete surgical excision of the orbital mass via an excisional biopsy approach. Histopathology was consistent with a benign solitary fibrous tumor. Postoperative follow-up was conducted at one month, assessing symptom resolution, ocular motility, and recurrence signs.

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Results

The patient presented with right-sided proptosis, mild motility restriction, and slight color vision deficit. CT revealed a well-defined inferomedial extraconal mass with heterogeneous enhancement and no bone involvement. Complete excision was performed, and histopathology confirmed a benign solitary fibrous tumor. At one-month follow-up, the patient was asymptomatic, with full resolution of proptosis, normal ocular motility, and no recurrence.

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Conclusion

Orbital solitary fibrous tumor is a rare, usually benign cause of painless unilateral proptosis, with nonspecific imaging and overlap with other spindle cell tumors. STAT6 immunohistochemistry has improved diagnostic accuracy. Surgical excision is the treatment of choice with excellent prognosis, and recurrence is uncommon. This case underscores the importance of integrating clinical, radiologic, and histopathologic findings to achieve accurate diagnosis and optimal management.

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Additional Authors

First name	Last name	Base Hospital / Institution
José Tonatiuh	Osorio-Vargas	Fundación Hospital Nuestra Señora de la Luz
Jesús Antonio	Medellín-Fournier	Fundación Hospital Nuestra Señora de la Luz
Humberto	López-García	Fundación Hospital Nuestra Señora de la Luz
Raquel Susana	Castro-Tamayo	Fundación Hospital Nuestra Señora de la Luz
Gerardo	Graue-Moreno	Fundación Hospital Nuestra Señora de la Luz

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