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Journal of the South African Veterinary Association

versión On-line ISSN 2224-9435
versión impresa ISSN 1019-9128

Resumen

CILLIERS, I; WILLIAMS, J; CARSTENS, A  y  DUNCAN, N M. Three cases of osteoma and an osseous fibroma of the paranasal sinuses of horses in South Africa. J. S. Afr. Vet. Assoc. [online]. 2008, vol.79, n.4, pp.185-193. ISSN 2224-9435.

Four horses were presented to the Onderstepoort Veterinary Academic Hospital with histories of facial asymmetry, nasal discharge or obstruction of normal nasal passage airflow. Radiographic examination of the maxillary sinuses of 2 cases revealed well circumscribed, unilateral, mineralised masses; the other 2 cases showed less mineralisation. The masses were accessed for further investigation by surgically created frontonasal bone flaps or trephination of the maxillary sinuses. Diagnosis of osteoma was confirmed histopathologically in 3 of the cases and of ossifying fibroma in the 4th. Two horses were euthanased directly after surgical intervention due to poor prognosis. Osteomas are by nature expansile tumours andfollow the complex communication of the sinuses, and therefore are not all amenable to surgical removal. Osseous fibromas are large, solitary, expansile lesions that are rare in all species but reported most frequently in horses. They have an apparent predilection for the rostral mandible of the horse.

Palabras clave : computed tomography; frontonasal bone flap; histopathology; horse; maxillary sinus; osteoma; osseous fibroma; ossifying fibroma; radiography; trephination.

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