Suture exostosis causing obstruction in the nasolacrimal duct in three horses.
METHODS
Three horses were presented with facial swelling and epiphora.


RESULTS
All horses had facial swellings and radiographic findings consistent with exostosis at the lacrimomaxillary suture, and ipsilateral epiphora. Positive contrast dacryocystorhinography demonstrated that the site of obstruction of the nasolacrimal duct was located where the duct traverses the lacrimomaxillary suture.


METHODS
Lacrimomaxillary suture exostosis.


CONCLUSIONS
Lacrimomaxillary suture exostosis should be considered as a differential diagnosis in cases of epiphora in horses. Dacryocystorhinography, preferably retrograde and normograde, may be used as an aid to diagnosis.
Carslake
H B
HB
Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand. h.b.carslake@massey.ac.nz
D000818:Animals; D003937:Diagnosis, Differential; D005096:Exostoses / Q000150:complications / Q000000981:diagnostic imaging* / Q000628:therapy; D006734:Horse Diseases / Q000000981:diagnostic imaging* / Q000209:etiology / Q000628:therapy; D006736:Horses; D007766:Lacrimal Apparatus Diseases / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy / Q000662:veterinary*; D008297:Male; D015508:Nasal Obstruction / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy / Q000662:veterinary*; D009301:Nasolacrimal Duct / Q000000981:diagnostic imaging; D011859:Radiography; D016896:Treatment Outcome