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American Journal of Neuroradiology, Vol 11, Issue 5 993-997, Copyright © 1990 by American Society of Neuroradiology

ARTICLES

Osteocartilaginous tumors in the parapharyngeal space arising from bone exostoses

EJ Russell, JM Levy, R Breit and JT McMahan
Department of Radiology, Northwestern Memorial Hospital, Chicago, IL.

Three osteocartilaginous tumors that arose from bone stalks were diagnosed by the demonstration, on multiplanar cross-sectional CT and MR images, of the site of stalk attachment to the adjacent mandible (one), skull base (one), and cervical vertebra (one). All three patients presented with signs and symptoms related to mass effect in the parapharyngeal region. Mass effect was more pronounced in the two cases of malignant degeneration (osteosarcoma, chondrosarcoma) than in the single case of benign osteocartilaginous exostosis. Differentiation of benign from malignant osteocartilaginous tumor may be accomplished by appreciating characteristic CT and MR features of the cartilage cap. The differential diagnosis of mass lesions of the parapharyngeal space should include tumors of osteocartilaginous origin.




Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X