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Case Report



OSTEOSARCOMA OF THE SPHENO-TEMPORO-ORBITAL BONE: IMAGING ASPECTS OF SUCH UNUSUAL LOCATION

Abdel Ilah Rayan Alaoui Bouarraqui, Fadoua Rais, Laila Jrondi.

Abstract
Osteosarcoma of the spheno-temporo-orbital bone is a very rare tumor. Despite the fact that primary osteogenic sarcomas are the most common bone neoplasm, their location in the skull bone is uncommon representing less than 2% of all skull tumors. We report the case of a 41-year-old woman, who has experienced periorbital pain with exophthalmos and left eye vision loss. Neuroimaging analysis including both brain computed tomography (CT-scan) and Magnetic resonance imaging (MRI) were performed. Although radiographic features of skull bone osteosarcomas are not specific, the combination of several radiographic features could lead to this diagnosis in such rare location. The final diagnosis was established by a trans-temporal biopsy with immunohistochemical study. Neurosurgical resection of the primary tumor was not possible given the important extent of the tumor and the involvement of adjacent structures, so the patient underwent conformational radiotherapy. The evolution was marked by local and metastatic progression. The patient received palliative chemotherapy and died few months later. The purpose of presenting this case is not only to report an uncommon malignancy of the skull bone, but also to provide imaging aspects of this rare location and to raise awareness among radiologists in order to consider this radiological entity as a differential diagnosis when a skull bone process is identified.

Key words: Osteosarcoma, skull bone, spheno-temporo-orbital bone, imaging aspects.



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