Exophthalmia Associated with Paranasal Sinus Osteoma in a Quarterhorse Mare

An 11-year-old Quarterhorse mare developed a paranasal sinus osteoma that extended into the right orbit and led to ipsilateral exophthalmia. Although the tumor was radiographically evident in the paranasal sinuses, ultrasonography was used to demonstrate extension of the tumor into the retrobulbar s...

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Bibliographic Details
Published in:Journal of veterinary diagnostic investigation 2004-03, Vol.16 (2), p.155-160
Main Authors: Scotty, Nicole C, Ford, Marnie, Williams, Fred III, Loiacono, Christie, Johnson, Philip J, Messer, Nat T. IV, Turnquist, Susan E, Essman, Stephanie
Format: Article
Language:English
Subjects:
Animals
Biopsy, Fine-Needle - veterinary
endoscopy
Endoscopy - veterinary
Exophthalmos - etiology
Exophthalmos - pathology
Exophthalmos - veterinary
Fatal Outcome
Female
Histocytochemistry - veterinary
Horse Diseases - pathology
Horses
mares
nasopharynx
nose
Osteoma - pathology
Osteoma - veterinary
Paranasal Sinus Neoplasms - pathology
Paranasal Sinus Neoplasms - veterinary
paranasal sinuses
Pregnancy
Pregnancy Complications, Neoplastic - pathology
Pregnancy Complications, Neoplastic - veterinary
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Summary:An 11-year-old Quarterhorse mare developed a paranasal sinus osteoma that extended into the right orbit and led to ipsilateral exophthalmia. Although the tumor was radiographically evident in the paranasal sinuses, ultrasonography was used to demonstrate extension of the tumor into the retrobulbar space, and endoscopy was used to identify its extension into the nasopharynx. Biopsies were obtained using both fine-needle aspiration and paranasal sinus trephination. Despite numerous antemortem diagnostic tests, only postmortem histologic analysis of the mass afforded the diagnosis of osteoma.
ISSN:1040-6387
1943-4936
DOI:10.1177/104063870401600212