Canine dacryolithiasis: a case description and mineral analysis |
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Authors: | Pedro Malho Jane Sansom Phillipa Johnson Jennifer Stewart |
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Affiliation: | 1. Unit of Comparative Ophthalmology, Centre of Small Animal Studies, Animal Health Trust, Newmarket, UK;2. Diagnostic Imaging Unit, Centre of Small Animal Studies, Animal Health Trust, Newmarket, UK;3. Diagnostic Laboratory Services, Animal Health Trust, Newmarket, UK |
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Abstract: | A 4‐year‐old, female, spayed, Labrador retriever was presented with a painless swelling of the left ventromedial eyelid and epiphora of 3 months duration. Bilateral patency of the nasolacrimal system was confirmed by the appearance of fluorescein dye at both nares. Ultrasonography revealed a well‐demarcated fluid‐filled structure containing echogenic ill‐defined material in close proximity to the nasolacrimal system. A transconjunctival surgical approach confirmed the close anatomical proximity of the cyst and the absence of a communication with the inferior canaliculus. The cyst contained multiple intraluminal calculi (dacryoliths). Following surgical excision of the cyst, the epiphora resolved and no recurrence was noted over a 12‐month follow‐up period. On histopathology, the cystic structure was lined by stratified squamous epithelium, consistent with lacrimal canaliculus epithelium. Presumed progression of a canalicular diverticulum to a cyst with the formation of intraluminal dacryoliths was suspected. Mineral analysis of the dacryoliths revealed a calcium carbonate composition. |
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Keywords: | cyst dacryolith diverticulum dog Labrador lacrimal canaliculus |
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