Kattens vanligaste endokrina sjukdom är Hypertyreoidism. Hypotyreoidism i sin primära form är å andra sidan mycket ovanligt och hos katt förekommer hypotyreoidism främst som en iatrogen sjukdom till följd av överbehandling av Hypertyreoidism. Tyreoideastimulerande hormon (TSH) är ett hormon som har stor roll i regleringen av tyreoideas aktivitet och styrs via negativ feedback.Ett syfte med denna studie var att fastställa preliminära referensvärden för TSH hos katt med kemiluminisent immunometrisk analys (canine TSH, Immulite 2000). Blodprov togs på 52 kliniskt friska katter i åldrarna 1-13 år för analys av TSH och tT4. Det preliminära referensintervallet för TSH på katt fastställdes till < 30 mU/L, vilket motsvarar < 0,28 ng/mL.

Hyperthyroidism has become the most commonly diagnosed endocrine disorder in cats. The recommended treatment of choice in the literature is administration of radioactive iodine. This treatment has been available at a few veterinary clinics in Sweden since 1999. Forty-six cats treated with a standard dose (80 MBq) of radioactive iodine (131I) at the Swedish University of Agricultural Sciences in the period 2000-2004 were followed for a median of 13 months (range 3-42 months) by means of a retrospective cohort study design. Tables predicting time of survival after treatment were made. At final follow-up thirty-nine cats (85%) were euthyroid, six cats (13%) remained hyperthyroid and one cat (2%) was hypothyroid.

Hyperthyroidism and chronic kidney failure (CKD) are common diseases in older cats. It can be difficult to evaluate kidney function in cats suffering from both conditions simultaneously. In the daily clinic serum creatinine is the analysis of choice when evaluating kidney function and secondary glomerular filtration rate (GFR). This marker does not, however, detect kidney damage until about 75 % of the function is lost. There are several other techniques available when investigating GFR but none are readily available for the small clinic.