Calcified tumours of the paranasal sinuses in three horses

Abstract

Three horses, a 10-year-old Thoroughbred mare, a 9-year-old Thoroughbred gelding and a 6-year-old Arab gelding, with calcified tumours of the paranasal sinuses, are described. All horses presented with purulent nasal discharges and facial distortion. Exophthalmos, blepharospasm and ocular discharge were also a feature in individual horses. A presumptive diagnosis of a calcified tumour was made on the basis of clinical signs and radiographic and endoscopic findings. The tumours ranged from 15 to 25 cm in diameter. A large frontonasal bone flap was used to expose the tumours, which were cleaved into several pieces with an osteotome and removed. Histological examination of the masses identified cementomas in two cases and an osteoma in the third. Long term follow up from 18 months to 5 years after surgery indicated that there was no recurrence. This case series demonstrates that, although calcified tumours of the paranasal sinuses are rare in horses, they should be considered in the differential diagnosis of purulent nasal discharge, facial swelling and ocular distortion, and are amenable to surgical treatment.

Squamous cell carcinoma of the paranasal sinuses in two horses

“…The result of nasal endoscopy in was mucopurulent discharge originating from the caudal aspect of the middle meatus (out of the nasomaxillary ostia). This finding is suggestive for paranasal sinus disease and may also occur in patients with neoplasia (Schaaf et al . 2007).…”

Benign cementoblastoma (true cementoma) in a cat

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Pathology of the thoracic dorsal spinous processes

“…In the last decade there have only been four cases of equine osteoma reported in the literature, all in the paranasal sinuses (Schaaf et al . ; Cilliers et al . ; Ragle et al .…”