Diagnosis of Retrobulbar Round Cell Neoplasia in a Macaroni Penguin (Eudyptes chrysolophus) Through Use of Computed Tomography

Sarah J. Woodhouse; Michelle Rose; Danielle R. Desjardins; Dipl ACVP; Dalen W. Agnew

doi:10.1647/2014-014

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1 March 2015 Diagnosis of Retrobulbar Round Cell Neoplasia in a Macaroni Penguin ( Eudyptes chrysolophus) Through Use of Computed Tomography

Sarah J. Woodhouse, Michelle Rose, Danielle R. Desjardins, Dipl ACVP, Dalen W. Agnew

Author Affiliations +

Sarah J. Woodhouse,^* Michelle Rose,^* Danielle R. Desjardins,^* Dipl ACVP, Dalen W. Agnew^*

^*From the Detroit Zoological Society, 8450 W 10 Mile Rd, Royal Oak, MI 48067, USA (Woodhouse); Blue Pearl Veterinary Partners, 29080 Inkster Rd, Southfield, MI 48034, USA (Rose); Phoenix Central Laboratory, 4338 Harbour Pointe Blvd SW, Mukilteo, WA 98275, USA (Desjardins); and Diagnostic Center for Population and Animal Health, Michigan State University, 4125 Beaumont Rd, Lansing, MI 48910, USA (Agnew).

J. of Avian Medicine and Surgery, 29(1):40-45 (2015). https://doi.org/10.1647/2014-014

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Abstract

A 25-year-old female macaroni penguin (Eudyptes chrysolophus) was diagnosed with exophthalmos secondary to retrobulbar neoplasia through use of computed tomography (CT). Histopathologic examination of the mass supported a diagnosis of malignant round cell neoplasia. Immunohistochemical (IHC) labeling was applied to determine cell origin; the neoplastic cells did not label with T-cell marker CD3 or B-cell marker BLA.36 and could not be further characterized. The scleral ossicles precluded evaluation of the retrobulbar space by ultrasonography; therefore, CT scanning is recommended for examination of intraorbital structures in penguin and other avian species.

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Sarah J. Woodhouse, Michelle Rose, Danielle R. Desjardins, Dipl ACVP, and Dalen W. Agnew "Diagnosis of Retrobulbar Round Cell Neoplasia in a Macaroni Penguin ( Eudyptes chrysolophus) Through Use of Computed Tomography," Journal of Avian Medicine and Surgery 29(1), 40-45, (1 March 2015). https://doi.org/10.1647/2014-014

Published: 1 March 2015

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Journal of Avian Medicine and Surgery
Vol. 29 • No. 1
March 2015

KEYWORDS

Avian

computed tomography

Eudyptes chrysolophus

exophthalmos

immunohistochemistry

macaroni penguin

retrobulbar mass

scleral ossicles

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Sarah J. Woodhouse, Michelle Rose, Danielle R. Desjardins, Dipl ACVP, Dalen W. Agnew "Diagnosis of Retrobulbar Round Cell Neoplasia in a Macaroni Penguin ( Eudyptes chrysolophus) Through Use of Computed Tomography," Journal of Avian Medicine and Surgery, 29(1), 40-45, (1 March 2015)

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