title: Dacryocystography in a cat with orbital pneumatosis.
abstract: A 2-year-old neutered male European short-haired cat was presented for a persistent discharge from the scar of previous left eye enucleation, performed 6 months prior by the referring veterinarian. A surgical exploration of the orbit was performed and retained nictitating membrane glandular and conjunctival tissues were removed. Eleven days later, the cat developed an orbital pneumatosis caused by retrograde movement of air through a patent nasolacrimal system and diagnosed by survey radiographic examination of the skull. Nasolacrimal system patency was assessed by dacryocystography performed by injection of iodinated contrast medium under pressure into the orbital cavity. Computed tomography dacryocystography confirmed the radiographic findings. The condition resolved following dacryocystography, possibly as an inflammatory response to the contrast medium. To our knowledge, this is the first case of orbital pneumatosis reported in a cat.
authors.affiliation: Interdepartmental Radiology Centre, University of Naples 'Federico II', via Delpino 1, 80137, Naples, Italy.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Meomartino
authors.forename: Maria P
authors.initials: MP
authors.lastname: Pasolini
authors.forename: Francesco
authors.initials: F
authors.lastname: Lamagna
authors.forename: Bruna
authors.initials: B
authors.lastname: Santangelo
authors.forename: Giuseppina
authors.initials: G
authors.lastname: Mennonna
authors.forename: Giovanni
authors.initials: G
authors.lastname: Della Valle
authors.forename: Barbara
authors.initials: B
authors.lastname: Lamagna
mesh_terms: D000818:Animals; D002371:Cat Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D002415:Cats; D003287:Contrast Media; D015353:Eye Enucleation / Q000009:adverse effects / Q000662:veterinary*; D007766:Lacrimal Apparatus Diseases / Q000000981:diagnostic imaging / Q000601:surgery / Q000662:veterinary; D008297:Male; D009301:Nasolacrimal Duct / Q000000981:diagnostic imaging; D013508:Ophthalmologic Surgical Procedures / Q000662:veterinary*; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary*; D012886:Skull / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000662:veterinary
chemical_list: D003287:Contrast Media
keywords: cat; computed tomography; dacryocystography; eye enucleation; orbital pneumatosis; radiographs