Editorial Type:
Scientific Reports

Successful radiation treatment of undertail fibrosarcoma in a Major Mitchell’s cockatoo (Lophochroa leadbeateri)

Daria HinkleDepartment of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS

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David EsharDepartment of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS

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 DVM, DABVP (ECM), DECZM (SM & ZHM)
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Neta AmbarDepartment of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS

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Sarah SchneiderDepartment of Diagnostic Medicine/Pathology, Kansas State Veterinary Diagnostic Laboratory, Manhattan, KS

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Chieko AzumaDepartment of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS

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 DVM, PhD, DACVR (Radiation Oncology)
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DOI:
https://doi.org/10.2460/javma.21.07.0335
Volume/Issue:
Volume 260: Issue 12
Online Publication Date:
24 Mar 2022
Restricted access
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Abstract

CASE DESCRIPTION

A male Major Mitchell’s cockatoo (Lophochroa leadbeateri) of unknown age presented with an ulcerated mass on the ventral tail caudodorsal to the cloaca.

CLINICAL FINDINGS

An impression smear of the mass showed spindle cell atypia. Multiple biopsies were submitted for histopathology with inconclusive results. A CT scan revealed a soft tissue mass causing compression of the cloacal lumen. The patient underwent surgical debulking, and a core of the mass was submitted again for histopathology, which reported it as fibrosarcoma.

TREATMENT AND OUTCOME

Under repeated general isoflurane gas anesthesia, the patient received a course of definitive radiation therapy totaling 60 Gy and divided in 3 Gy X 20 fractions. By treatment completion, the lesion had decreased in size with necrotic debris on the surface. Surrounding tissues appeared healthy and no adverse effects were observed. As of 1.5 years post-treatment, the mass appears completely healed with no signs of reoccurrence.

CLINICAL RELEVANCE

This case suggests that radiation therapy with this protocol could be an effective treatment option for fibrosarcoma in avian species.

Abstract

CASE DESCRIPTION

A male Major Mitchell’s cockatoo (Lophochroa leadbeateri) of unknown age presented with an ulcerated mass on the ventral tail caudodorsal to the cloaca.

CLINICAL FINDINGS

An impression smear of the mass showed spindle cell atypia. Multiple biopsies were submitted for histopathology with inconclusive results. A CT scan revealed a soft tissue mass causing compression of the cloacal lumen. The patient underwent surgical debulking, and a core of the mass was submitted again for histopathology, which reported it as fibrosarcoma.

TREATMENT AND OUTCOME

Under repeated general isoflurane gas anesthesia, the patient received a course of definitive radiation therapy totaling 60 Gy and divided in 3 Gy X 20 fractions. By treatment completion, the lesion had decreased in size with necrotic debris on the surface. Surrounding tissues appeared healthy and no adverse effects were observed. As of 1.5 years post-treatment, the mass appears completely healed with no signs of reoccurrence.

CLINICAL RELEVANCE

This case suggests that radiation therapy with this protocol could be an effective treatment option for fibrosarcoma in avian species.

Contributor Notes

Corresponding author: Ms. Hinkle (dhagan7@vet.k-state.edu)
Cover Journal of the American Veterinary Medical Association
Journal of the American Veterinary Medical Association
ISSN:
0003-1488
Publication Date:
24 Mar 2022
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