2015 ACVIM Forum Research Abstract Program

The purpose of this study was to investigate the usefulness of cTSH measurements in the diagnosis of mild to severe hyperthyroidism and in differentiating hyperthyroid cats (n = 786) from healthy cats (n = 120) and euthyroid cats suspected of hyperthyroidism but found not to have the disease (n = 28). For inclusion, all cats had routine laboratory testing, a complete serum thyroid panel (T4, T3, FT4 by dialysis, TSH), and thyroid scintigraphy. Subsequent calculation of thyroid-to-salivary [T/S] and thyroid-to-background [T/B] ratios were used to confirm or exclude hyperthyroidism, as previously described (Thyroid scintigraphy findings in 2,096 cats with hyperthyroidism. Vet Radiol Ultrasound, in press).