title: Iatrogenic nasolacrimal duct obstruction following tooth extraction in a cat.
abstract: A 10-year-old DSH cat was referred for a dental evaluation and extraction procedure. Subsequently, the animal developed an acute onset of ocular discharge. Ophthalmologic examination revealed presence of unilateral ocular mucoid discharge leading to a diagnosis of epiphora secondary to nasolacrimal duct obstruction. Dacryocystorhinography was performed and confirmed the presence of a nasolacrimal duct obstruction, presumably acquired after an invasive dental procedure. Additionally, a vinyl cast in situ study of the nasolacrymal apparatus was performed to demonstrate the route of the nasolacrimal duct in the cat and its relationship to oral dental structures. This report documents an unusual case in which excessive inflammation/edema following tooth extraction caused acute epiphora secondary to extraluminal compression of the distal nasolacrimal duct.
authors.affiliation: Federal University of Paraná (PPGCV- UFPR), Curitibia, Paraná, Brazil.
authors.forename: Sávia Calline C S
authors.initials: SC
authors.lastname: Paiva
authors.forename: Tilde R
authors.initials: TR
authors.lastname: Froes
authors.forename: Rogério Ribas
authors.initials: RR
authors.lastname: Lange
authors.forename: Marcello
authors.initials: M
authors.lastname: Machado
authors.forename: José Ricardo
authors.initials: JR
authors.lastname: Pachaly
authors.forename: Fabiano
authors.initials: F
authors.lastname: Montiani-Ferreira
mesh_terms: D000818:Animals; D002415:Cats; D003481:Cuspid / Q000601:surgery; D003789:Dental Pulp Exposure / Q000601:surgery / Q000662:veterinary; D007049:Iatrogenic Disease; D007766:Lacrimal Apparatus Diseases / Q000209:etiology / Q000662:veterinary; D007767:Lacrimal Duct Obstruction / Q000209:etiology / Q000662:veterinary*; D008297:Male; D013203:Staphylococcal Infections / Q000662:veterinary; D007507:Therapeutic Irrigation; D014081:Tooth Extraction / Q000009:adverse effects / Q000662:veterinary*; D014091:Tooth Resorption / Q000601:surgery / Q000662:veterinary