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.
Ophthalmology Service, Department of Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, AL9 7TA, UK. cdawson@rvc.ac.uk.
Charlotte
http://orcid.org/0000-0001-9974-1244
C
Dawson
Diagnostic Imaging Service, Department of Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, AL9 7TA, UK.
Jonathon
J
Dixon
Diagnostic Imaging Service, Department of Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, AL9 7TA, UK.
Richard
R
Lam
Department of Pathology and Pathogen Biology, Hawkshead Lane, North Mymms, Hertfordshire, AL9 7TA, UK.
Simon L
SL
Priestnall
Ophthalmology Service, Department of Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, AL9 7TA, UK.
Natalia
N
Escanilla
D000818:Animals; D003560:Cysts / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology / Q000662:veterinary*; D003937:Diagnosis, Differential; D006734:Horse Diseases / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D006736:Horses; D007766:Lacrimal Apparatus Diseases / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D008297:Male; D009301:Nasolacrimal Duct; D009364:Neoplasm Recurrence, Local; D014057:Tomography, X-Ray Computed
computed tomography; cyst; dacryops; equine; histopathology; nasolacrimal system