Publikationsdatenbank

Leiomyosarcoma of the external ear canal as a cause of otitis externa, media, interna in a chinchilla (Chinchilla lanigera) (2019)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Bertram, Christof A. (WE 12)

Klopfleisch, Robert (WE 12)

Erickson, Nancy A. (WE 12)

Lübke-Becker, Antina (WE 7)

Müller, Kerstin (WE 20)

Quelle

Journal of exotic pet medicine

Bandzählung: 31

Seiten: 13 – 16

ISSN: 1557-5063

Sprache

Englisch

Verweise

URL (Volltext): https://www.sciencedirect.com/science/article/abs/pii/S1557506319301090

DOI: 10.1053/j.jepm.2019.05.001

Kontakt

Institut für Mikrobiologie und Tierseuchen

Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 51843 / 66949
mikrobiologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

An eight-year-old, intact male chinchilla presented with purulent and hemorrhagic discharge from the left ear canal. Radiographs of the skull were unremarkable. Aerobic bacterial culture of the discharge identified Corynebacterium amycolatum and Staphylococcus aureus. Treatment with antibiotics based on antibiotic susceptibility testing and analgetics was initiated but the animal´s health condition deteriorated over the following two weeks and a peripheral vestibular syndrome developed. Computed tomography revealed an opaque soft tissue mass completely obstructing the external ear canal and a small amount of soft tissue-dense material in the tympanic bulla consistent with otitis media. Histopathology of a biopsy of the aural mass was consistent with aural leiomyosarcoma. Surgical intervention was rejected by the owner. Seven weeks after initial presentation, the animal additionally developed facial nerve paralysis, hemifacial spasm, and enophthalmus. Repeated computed tomography and radiography identified severe otitis media and the owner decided for humane euthanasia. Postmortem examination confirmed aural leiomyosarcoma associated with otitis externa, media, and interna. Microbiological examination of a swab of the middle ear revealed the presence of Prevotella sp. and Bacteroides fragilis-group. Present findings strongly suggest aural neoplasia as predisposing factor for development of the external, middle, and inner ear infection.