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Semi-quantitative palpation to diagnose feline hyperthyroidism
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Hyperthyroidism is the most common endocrinopathy in older cats. Diagnosis is usually confirmed by an increased TT4 level. In this study, the relationship between a semi-quantitative palpation of the thyroidea and TT4 levels is evaluated in more than 150 cats. With very interesting results!
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In 155 cats, both with and without clinical signs of hyperthyroidism, total thyroxine (TT4) concentrations were compared to a sensitive, semi-quantitative thyroid palpation technique.
On the basis of TT4 concentrations, 23 of the 155 cats were classified as hyperthyroid. The size of individual thyroid glands was scored between `0` (non-palpable) and a maximum of `6`.
One or more enlarged thyroid glands (score >0) were palpated in 22 of the 23 hyperthyroid cats and in 78 of the 132 euthyroid cats.
However, none of the 132 euthyroid cats had a thyroid lobe score of greater than `3` whereas 18 of the 23 hyperthyroid cats had a thyroid lobe score of `4` or greater, and in two of the five that had scores below `4` there was evidence of intrathoracic functional thyroid tissue on scintigraphy.
Source: G. D. Norsworthy, V. J Adams, M. R. Mcelhaney, J. A. Milios (2002): Relationship between semi-quantitative thyroid palpation and total thyroxine concentration in cats with and without hyperthyroidism. In: Journal of Feline Medicine and Surgery , 4, 3, September 2002 139-143
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25th FECAVA EuroCongress 4-9 September 2019, St. Petersburg / RussiaESVN-ECVN Symposium 2018ESAVSVetAgendaLab in Practice - Clinical PathologyEuropean Master of Small Animal Veterinary MedicineSEVC 2014ESAVS - Neuropathology & MRICongressMed 2014ACVIM 2014VetContact
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