Paranasal meningioma was diagnosed in a 5-year-old Appaloosa gelding. The mass occupied the right maxillary, frontal, and sphenopalatine sinuses but did not invade the calvarium. The diagnosis was based on histologic evaluation, positive immunohistochemical staining for vimentin and cytokeratin, and ultrastructural features including the presence of interdigitating spindle cells with numerous desmosomes.
References
1.
ArlichASchmidtD: 1990, Immunohistochemical profile of meningiomas and their histologic subtypesHum Pathol21:843–849
2.
CordyDR: 1990, Tumors of the nervous system and eyeIn: Tumors in domestic animals, ed., MoultonJE, 3rd ed., pp. 640–655. University of California Press, Berkley, CA
3.
DixonPMHeadKW: 1999, Equine nasal and paranasal sinus tumours: part 2: a contribution of 28 case reportsVet J157:279–294
4.
FuYSPerzinKH: 1997, The nasal cavity, paranasal sinuses and nasopharynxIn: Principles and practice of surgical pathology and cytopathology, eds., SilverbergSGDeLellisRAFrable, 3rd ed., pp. 1039–1071. Churchill Livingstone, Inc., New York, NY
5.
HeadKWDixonPM: 1999, Equine nasal and paranasal sinus tumors: part 1: review of the literature and tumor classificationVet J157:261–278
6.
MeisJOrdonezNGBrunerJM: 1986, Meningiomas: an immunohistochemical study of 50 casesArch Pathol Lab Med110:934–937
7.
NgHKWongAT: 1993, Expression of epithelial and extracellular matrix protein markers in meningiomasHistopathology22:113–125
8.
PatnaikAKLiebermanPHErlandsonRA: 1986, Paranasal meningioma in the dog: a clinicopathologic study of ten casesVet Pathol23:362–368
9.
RadleyMGdi Sant AgnesePAEskinTAWilburDC: 1989, Epithelial differentiation in meningiomas. An immunohistochemical and ultrastructural study with review of the literatureAm J Clin Pathol92:266–272
10.
SwainREKingdomTTDelGaudioJM: 2001, Meningiomas of the paranasal sinusesAm J Rhinol15:27–30
11.
WalkerMASchumacherJSchmitzDG: 1998, Cobalt 60 radiotherapy of squamous cell carcinoma of the nasal cavity and paranasal sinuses in three horsesJ Am Vet Med Assoc212:848–851
