Prevalence of feline hyperthyroidism in Hungary and factors associated with the incidence of the disease

Abstract

It has become evident in small animal veterinary practices that there is an increasing incidence of feline hyperthyroidism (FHT). There has been a significant increase in the prevalence of the disease since the 1970s. It is unclear, however, whether this is specifically due to an increase in the number of cases or because there is a greater awareness of the disease amongst veterinarians. Hyperthyroidism is due to an increased production of thyroid hormones, T3 (Triiodothyronine) and T4 (Thyroxine), from one or both lobes of the thyroid gland which may be enlarged due to hyperplasia, a benign tumour, or rarely, a malignant tumour. There have been many studies over the past 40 years focusing on the potential causes of the rising incidence of FHT across the world.