title: Taenia coenurus in the orbit of a chinchilla.
abstract: A 4-year old, male intact, captive-bred chinchilla (Chinchilla lanigera) was presented due to progressive exophthalmos of the right eye over a 5-month period. Ophthalmic examination revealed exophthalmos with dorsal displacement of the right globe. Retropulsion was decreased and a fluctuant, subcutaneous mass could be palpated posterior and dorsal to the central aspect of the zygomatic bone. Transdermal ultrasonography revealed a fluid-filled mass consistent with a cyst located within the ventral right orbit. Computed tomography demonstrated dorsal displacement of the globe, lateral displacement of the zygomatic arch, and numerous mineral-dense foci within the lumen of the cyst. The cyst was removed en bloc by ventral transpalpebral orbitotomy. Histopathology revealed a single capsulated cyst with multiple invaginated protoscolices, characterized by a prominent scolex with refractile hooklets, suckers, and abundant calcareous corpuscles consistent with a Taenia coenurus. Exophthalmos resolved with surgical therapy and there was no evidence of recurrence or postoperative complications over a period of 2 years. To the authors' knowledge, this is the first reported case of an orbital cyst of parasitic origin in a chinchilla.
authors.affiliation: Veterinary Medical Teaching Hospital, University of California, Davis, CA 95616, USA.
authors.forename: Bradford J
authors.initials: BJ
authors.lastname: Holmberg
authors.forename: Steven R
authors.initials: SR
authors.lastname: Hollingsworth
authors.forename: Anna
authors.initials: A
authors.lastname: Osofsky
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Tell
mesh_terms: D000818:Animals; D002682:Chinchilla; D003937:Diagnosis, Differential; D005094:Exophthalmos / Q000209:etiology / Q000662:veterinary; D015822:Eye Infections, Parasitic / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000662:veterinary*; D008297:Male; D013621:Taenia / Q000302:isolation & purification* / Q000648:ultrastructure; D013622:Taeniasis / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary; D014463:Ultrasonography