Peer-reviewed veterinary case report
Primary hypothyroidism due to thyroid carcinoma in a feline
- Journal:
- Ciência Rural
- Year:
- 2023
- Authors:
- Isabela de Andrade Brum et al.
- Species:
- cat
Plain-English summary
A 13-year-old cat was diagnosed with hypothyroidism, a condition that is quite rare in cats. The cat had been experiencing swelling in its neck for a year, which had noticeably increased in size two weeks before it was taken to the vet. It also showed signs of hoarseness, low energy, weight gain, and constipation. During the examination, the cat was found to have a low body temperature. Tests indicated that the cat had a thyroid tumor, specifically a type called follicular-compact carcinoma, which was confirmed through a tissue sample. This case is notable as it is the first report of hypothyroidism in a cat in Brazil caused by a thyroid tumor.
Abstract
ABSTRACT: Hypothyroidism is rarely observed in cats. This article reports the case of a thirteen-year-old feline with a one-year history of bilateral cervical swelling that had majorly grown in size two weeks prior to the animal’s admission. The cat presented with dysphonia, lethargy, weight gain, and constipation. On physical examination, hypothermia was observed, with a rectal temperature of 36.5 ºC. Fine-needle aspiration cytology suggested thyroid neoplasia. The serum levels of total T4 and thyroid stimulating hormone (TSH), along with the exclusion of non-thyroid diseases, confirmed the diagnosis of hypothyroidism. This is the first report of feline hypothyroidism in Brazil secondary to thyroid neoplasia, classified as a follicular-compact carcinoma and confirmed by histopathology.
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Search related cases →Original publication: https://doi.org/10.1590/0103-8478cr20210795