Abstract
Ultrasonographic study of a schwannoma of the oral and maxillofacial region have rarely been reported. Here we report ultrasonographic findings from the nine cases of schwannoma located in that region that we encountered between 1984 and 1995. The tumor was delineated as a hypoechoic mass with a sharply demarcated contour and posterior echo enhancement. Change in the internal echo followed pathologic degenerative changes: cystic change, bleeding, myxomatous change, and hyaline degeneration. The internal echo was in agreement with the description of Antoni type A tissue, showing hemorrhagic and hyaline degeneration in the tumor. The cystic pattern of the ultrasonogram corresponded to cystic change, and hypoechoic area of the ultrasonogram corresponded to Antoni type B tissue and myxomatous change. The internal echo pattern on the ultrasonogram of a schwannoma was found to reflect the pathologic structure of the tumor.
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References
Ishikawa G: Oral Pathology. Kyoto, Nagasue Shoten, 1995: pp.590–591. [in Japanese]
Cherrick HM and Eversole LR: Benign neural sheath neoplasm of the oral cavity; report of thirty-seven cases.Oral Surg 1971;32 (6): 900–909.
Krause HK, Hemmer J and Kraft K: The behaviour of neurogenic tumours of the maxillofacial region.J Craniomaxillofac Surg 1993;21: 258–261.
Ishii J, Nagasawa H, Wadamori T, et al.: Ultrasonography in the diagnosis of palatal tumors.Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1999;87: 39–43.
Kojima K, Nishi M, Tumura M, et al.: Small retroperitoneal schwannoma: sonographic-pathologic correlation. Jpn J Med Ultrasonics 1996;23 (5): 373–380. [in Japanese]
Niizawa M, Ishida H, Komatsuda T, et al.: Schwannoma of the psoas muscle: a case report and review. Jpn J Med Ultrasonics 1998;25 (5): 637–640.
Ellis GL, Abrams AM and Melrose RJ: Intraosseous benign neural sheath neoplasms of the jaws: report of seven new cases and review of the literatureOral Surg 1977;44 (5): 731–743.
Nagasawa H: Ultrasonographic of tongue cancer diagnosis using intraoral high frequency probe. J Stomatol Soc, Jpn 1999;66 (1): 98–106. [in Japanese]
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Ishii, J., Nagasawa, H., Yamashiro, M. et al. Ultrasonic study of schwannoma of the oral and maxillofacial region: Comparison of ultrasonograms and pathologic findings. J Med Ultrasonics 28, 59–63 (2001). https://doi.org/10.1007/BF02481454
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DOI: https://doi.org/10.1007/BF02481454