Some abnormalities of the thyroid gland in non‐domesticated birds

Wadsworth, P.F.; Jones, D. M.

doi:10.1080/03079457908418352

Cited by 17 publications

(5 citation statements)

References 7 publications

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“…Thyroid hyperplasia (goiter) is considered a common problem in birds and is common in pigeons (Schmidt and Reavill, 2002;Wadsworth and Jones, 1979). The most FIGURE 31.1 Vitamin E deficiency encephalomalacia in turkey poults.…”

Section: Non-infectious Diseases Nutritionalmentioning

confidence: 99%

Galliformes and Columbiformes

Crespo

França

Fenton

et al. 2018

Pathology of Wildlife and Zoo Animals

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Section: Non-infectious Diseases Nutritionalmentioning

confidence: 99%

Galliformes and Columbiformes

Crespo

França

Fenton

et al. 2018

Pathology of Wildlife and Zoo Animals

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“…The present study was carried out to assess which species of captive wild birds at the Zoological Society of London are liable to be affected by hepatic haemosiderosis. Some of the cases included in this survey have been reported elsewhere (Wadsworth etal, 1978;Wadsworth and Jones, 1979,1980. Haemosiderin is commonly present in small amounts in the liver and the use of the term hepatic haemosiderosis implies the presence of an abnormal quantity of stainable iron pigment in either hepatocytes or reticulo-endothelial cells, or both.…”

Section: Introductionmentioning

confidence: 99%

Hepatic Haemosiderosis in birds at the zoological society of London

Wadsworth¹,

Jones

Pugsley

1983

Avian Pathology

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“…2 In poultry, thyroid neoplasms are also reportedly rare, although thyroid adenomas and adenocarcinomas have been reported in chickens. 7,18,34,128 Among thyroid neoplasms, follicular adenoma has been suggested to be the most common neoplasm in pet birds. 129 Additionally, thyroid cystic fibroadenoma has been described in a black-chested buzzard eagle ( Geranoaetus melanoleucus ), and a thyroid follicular cystadenoma has been reported in a crested caracara ( Caracara plancus ), although the clinical signs associated with these tumors were not reported.…”

Section: Discussionmentioning

confidence: 99%

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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Some abnormalities of the thyroid gland in non‐domesticated birds

Abstract: SUMMARYThe thyroid gland in 87 non-domesticated birds has been examined. Both macroscopic and histological abnormalities are infrequent. A follicular adenoma together with cases of colloid goitre and diffuse micro follicular hyperplasia are described.

Cited by 17 publications

References 7 publications

Galliformes and Columbiformes

Galliformes and Columbiformes

Hepatic Haemosiderosis in birds at the zoological society of London

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

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