Differential diagnoses, investigation, and management of a periocular swelling close to the nasolacrimal duct in a horse - A case report of Dacryops.
To describe the differential diagnoses, investigation, and management of a periocular swelling close to the nasolacrimal duct in a horse that was consistent with a nasolacrimal duct dacryops (lacrimal cyst). A 16-year-old gelding, Connemara cross presented with a history of a periocular swelling rostroventral medial to the right eye that had been sampled by the referring veterinary surgeon. A cystic lesion was diagnosed following standing computed tomography. Surgical removal of the cystic lesion was performed, and the tissue was submitted for histopathologic and immunohistochemical examination. Surgical removal of the cyst was curative, and there was no recurrence of clinical signs 7 months later. There was a small amount of mineralized material in the center of the cyst. Histopathologic and immunohistochemical examination confirmed a nasolacrimal duct cyst. Dacryops can form in horses as well as other species and appears to have a favorable outcome if surgically removed.
['Dawson|Charlotte|C|http://orcid.org/0000-0001-9974-1244', 'Dixon|Jonathon|J|', 'Lam|Richard|R|', 'Priestnall|Simon L|SL|', 'Escanilla|Natalia|N|']
D000818:Animals D003560:Cysts D003937:Diagnosis, Differential D006734:Horse Diseases D006736:Horses D007766:Lacrimal Apparatus Diseases D008297:Male D009301:Nasolacrimal Duct D009364:Neoplasm Recurrence, Local D014057:Tomography, X-Ray Computed
dacryops cyst computed tomography histopathology equine nasolacrimal system