Squamous cell carcinoma of the footpad with systemic metastasis in a captive crowned solitary eagle (&lt;i&gt;Buteogallus coronatus&lt;/i&gt;)

Rocha, Camila Maria da Silva; Wilson, Taís Meziara; Sousa, Davi Emanuel Ribeiro de; Pereira, Alexandra A B G; Leonardo, André Santos; Name, Khesller Patrícia Olázia; Castro, Márcio Botelho de

doi:10.1292/jvms.20-0285

Cited by 2 publications

(1 citation statement)

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“…95,100 These neoplasms are commonly observed in numerous avian species. 1,2,[95][96][97][98][99][100][101][102][103][104][105][106][107][108] For parrots, our findings were in agreement with previous work, with 4 cases of SCC diagnosed in the uropygial gland and 1 as a dermal mass on the wing. In chickens, SCC occurs infrequently, but there have been reports of dermal lesions on the legs with a benign biological behavior that spontaneously resolve, 19 malignant generalized skin ulceration (avian keratoacanthoma), 109,110 and lesions in the oropharynx and upper gastrointestinal tract.…”

Section: Discussionsupporting

confidence: 91%

Survey of the Clinical, Cytological, and Histopathological Features Associated with Neoplasms in Captive Avian Species in Melbourne, Australia

Sutherland,

Luk,

Courtman

et al. 2023

Journal of Avian Medicine and Surgery

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Over a 3.5-year period, tissue samples from 141 companion and aviary birds with clinically suspected, naturally occurring solid neoplasms were collected via surgical biopsy (n = 53) or at necropsy examination (n = 88) from a population of birds presenting to an avian veterinary clinic in Melbourne, Australia. Neoplastic processes were identified in 73.7% (n = 104) of samples, with 83.7% (n = 87) being interpreted as malignant neoplasia and 16.3% (n = 17) being interpreted as benign neoplasia. The overall estimated prevalence of neoplasia in the study population (n = 5125) was 2.45% (95% confidence interval, 2–2.97%). The gastrointestinal and reproductive tracts were the most commonly affected systems. The most common presenting signs were nonspecific and included lethargy, coelomic distension, and inappetence. In 59 cases, fine-needle aspirates (FNAs) and impression smears were also obtained and evaluated cytologically. The accuracy of cytology for detecting neoplasia in birds and for determining whether a neoplastic process was benign or malignant was assessed by using histopathology as the “gold standard.” There was complete agreement between the cytological and histopathological diagnoses in 72.8% (43/59) of cases. Cytology correctly identified 87.5% of these cases (35/40) as malignant neoplasms and 55.6% (5/9) as benign processes. There was no significant difference between the use of cytology and histopathology for the detection of malignant neoplasia in birds (P = 0.185). The accuracies of FNAs and impression smears for examining avian tumors were also compared. Overall, the best cell preservation was obtained by performing impression smears from tissues, with 62.2% (n = 28) returning high cellularity for cytological examination, compared to 53.8% (n = 14) when samples were obtained by FNA. This study provides an overview of the types and prevalence of neoplasms in a captive bird population from Australia, correlates physical examination findings with tumor types, and provides evidence that cytology is a reliable preliminary diagnostic tool for detecting neoplasia in birds.

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