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chordoma |
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The differential diagnosis of large nasopharyngeal masses should include (1) benign disease such as juvenile angiofibroma, teratoma, meningoencephalocele, chordoma, paraganglioma, and nasopharyngeal extension of a parapharyngeal parotid tumor and (2) malignant disease such as carcinoma, lymphoma, and sarcoma. Spine tumors most commonly treated with CyberKnife include: meningioma, schwannoma, neurofibroma, hemangioblastoma, arteriovenous malformations, chondrosarcoma, chordoma, ependyoma, spinal metastases from many sources, myeloma, lymphoma, and Ewing sarcoma. A primary chordoma of the nasal cavities and paranasal sinuses is extremely rare compared with clival chordomas, which often present as nasal masses after spreading anteriorly. |
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