Ameloblastic Ondontoma in a Foal

Abstract

SUMMARY A 4 month old foal with right sided maxillary enlargement and considerable upper airway obstruction had an ameloblastic odontoma in the right maxillary sinus. This odontogenic tumour, probably congenital in nature, had extensively distorted the structure and contours of the sinus, and displaced the adjacent turbinates and nasal septum. RÉSUMÉ Un foal de 4 mois présentait une hypertrophie du maxillaire supérieur droit avec obstruction marquée des voies respiratoires supérieures: ceci était provoqué par un odontome ameloblastique dans le sinus maxillaire droit. Cette tumeur odontogène de nature probablement congénitale avait déformé considérablement la structure et l'aspect du sinus et déplacé les cornets et le septum voisin. ZUSAMMENFASSUNG Ein vier Monate altes Fohlen mit einer rechtsseitigen Umfangsvermehrung der Maxilla und erheblicher Atem‐wegsstenose wies ein ameloblastisches Odontom in der rechten Kieferhöhle auf. Dieser odontogene Tumor, der wahrscheinlich bei der Geburt vorhanden war, hatte die Struktur und die Umrisse des Sinus hochgradig verzerrt und die angrenzenden Conchen und das Nasen‐septum verdrängt.

Maxillectomy and mandibulectomy in the horse: Indications and necessity of post operative adjunct therapy

“…Differentiation relies on histopathological evaluation of biopsy specimens demonstrating the presence of odontogenic (specifically enamel producing) epithelium. This tumour has previously been described in foals (Roberts et al 1978;Summers et al 1979;Jones and Brumbaugh 1991). Reports of early intervention and wide surgical margins suggest that surgery alone can be curative (French et al 1984;Rosol et al 1994).…”

“…This tumour has previously been described in foals (Roberts et al . ; Summers et al . ; Jones and Brumbaugh ).…”

Calcified tumours of the paranasal sinuses in three horses

“…Tumours of the paranasal sinuses in horses and other species are uncommon 1–4 . The most commonly reported mass affecting the paranasal sinus is ethmoid haematoma, however strictly speaking these are not classified as tumours 5 .…”

“…These all have a high rate of local recurrence after surgical excision and have a poor long‐term prognosis with surgery alone 2,7,8 . Calcified tumours of the paranasal sinuses include osteomas, 2,8–10,12–18 osteosarcomas, 2 ameloblastic odontomas 3 and compound 19 and complex 20 odontomas. Calcified paranasal sinus tumours have been reported previously in horses and other species, 2,4,7,8,18,21,22 although limited information has been published in the literature.…”

Ameloblastic Fibro-Odontoma Associated with a Retained Molar in an Oldenburg Mare

“…4 Ameloblastic odontomas, occurring within the maxilla, have been reported from a 6-week-old Arabian foal, a 4-month-old mixed Arab foal, and a 1-year-old Shetland pony. 7,8 Although there is no site predilection in animals, AFOs usually occur in the body or ramus of the mandible in humans.…”