| CASE REPORT |
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| Year : 2020 | Volume
: 32
| Issue : 4 | Page : 414-416 |
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Giant cell tumor: Changing behavior from intraorbital to intraosseous mass
Mohammad Taher Rajabi1, Seyedeh Zahra Poursayed Lazarjani1, S Saeed Mohammadi1, Mohammad Veshagh2, Farideh Hosseinzadeh3, Seyed Mohsen Rafizadeh1, Fahimeh Asadi Amoli4, Simindokht Hosseini1
1 Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
2 Eye Research Center, Labbafinejad Eye Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 ENT and Head and Neck Research Center, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
4 Department of Pathology, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
Correspondence Address:
Seyedeh Zahra Poursayed Lazarjani
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran
Iran
 Source of Support: None, Conflict of Interest: None
DOI: 10.4103/JOCO.JOCO_63_20
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Purpose: To present a patient with giant cell tumor (GCT) of the orbit by changing behavior from an intraorbital mass to an intraosseous tumor.
Methods: A 16-year-old boy presented with pain, swelling, erythematous of the left upper and lower eyelids, proptosis, and diplopia. Ophthalmic examination revealed chemosis, conjunctival injection, limited elevation, depression as well as abduction in the left eye.
Results: Multislice computed tomography scan (CT scan) of the orbit and paranasal sinuses showed a hyperdense, oval, extraconal mass with bone erosion. Magnetic resonance imaging of the orbit showed an inferior lateral isointense, oval, extraconal mass that had indented the globe. The patient underwent superior lateral orbitotomy, and the orbital mass was excised. Two months later, the patient developed proptosis, severe chemosis, and eyelid erythema in the same eye. CT scan showed an intraosseous mass in the lateral wall of the orbit that had pushed the globe anteromedially. Intraosseous tumor was resected, and the lateral orbital wall was drilled during the second surgery. GCT was diagnosed based on pathological survey.
Conclusion: Following the resection of the orbital GCT, the tumor behavior may change to an intraosseous lesion.
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