Treatment of disorders of the equine nasal cavities and sinuses

False nostril cysts can be fully excised using local anaesthesia in the standing sedated horse. Most cases of mycotic rhinitis will respond to topical antimycotic agents. Most cases of acute primary sinusitis will resolve without treatment, but more chronic cases should have high-volume sinus lavage using an indwelling intra-sinus catheter. Cases that do not respond to this treatment may require surgical sinusotomy to remove inspissated pus and some require sino-nasal fistulation to improve drainage and most such surgery can be performed in the standing sedated horse. Cases of dental sinusitis, require extraction of the infected cheek tooth, preferably by oral extraction along with sinus lavage. Sinus cysts can be surgically removed and have an excellent prognosis, but most sinus tumours are highly malignant and carry a poor prognosis after removal. Progressive ethmoid haematoma lesions are best treated by repeated intra-lesionsal, trans-endoscopic injection of formalin ...