Solitary fibrous tumour of the orbit. Report of a new case.
OBJECTIVE
Solitary fibrous tumour (SFT) of the orbit is a very rare lesion that may be misdiagnosed as fibrous histiocytoma, haemangiopericytoma, or other orbital tumour. We studied a case of SFT of the orbit in a 35-year-old woman.


METHODS
The patient, with a 1-year history, reported a 'pressure' sensation behind her right eye, but no pain, vision changes, or other associated symptoms. Ocular examination was normal. Magnetic resonance imaging (MRI) showed a well-circumscribed medial mass in the right orbit. The tumour was excised.


RESULTS
The tumour was a cellular spindle-cell neoplasm with a storiform pattern. The tumour cells were spindle-shaped with bland nuclei and rare mitoses. Immunostaining was positive for vimentin and CD34, but negative for cytokeratin (AE1-AE3), EMA, desmin, smooth muscle actin, S-100, CD31, CD45 and bcl-2.


CONCLUSIONS
SFT can infrequently involve the orbit. The tumour must be removed entirely to avoid recurrences. Careful and continued follow-up is important because orbital recurrence may occur several years after the excision of the primary tumour.
Lanuza
A
A
Department of Ophthalmology, General Hospital of Castellon, Spain.
Lazaro
R
R
Salvador
M
M
Solanes
C
C
Ramos
F
F
Sorli
E
E
D000328:Adult; D001763:Blepharoptosis / Q000209:etiology; D004487:Edema / Q000209:etiology; D005141:Eyelid Diseases / Q000209:etiology; D005260:Female; D005350:Fibroma / Q000150:complications / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D009918:Orbital Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000378:metabolism / Q000601:surgery; D014057:Tomography, X-Ray Computed