PT  - JOURNAL ARTICLE
AU  - Russell, E J
AU  - Levy, J M
AU  - Breit, R
AU  - McMahan, J T
TI  - Osteocartilaginous tumors in the parapharyngeal space arising from bone exostoses.
DP  - 1990 Sep 01
TA  - American Journal of Neuroradiology
PG  - 993--997
VI  - 11
IP  - 5
4099  - http://www.ajnr.org/content/11/5/993.short
4100  - http://www.ajnr.org/content/11/5/993.full
SO  - Am. J. Neuroradiol.1990 Sep 01; 11
AB  - 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.