Abstract
Diabetes mellitus and thyroid dysfunction are the two most common endocrine disorders. Both have a similar frequency (around 10 %) and often occur together.
The coincidence is more common in type 1 diabetes, particularly in woman can reach up to 30%. However, there is also a higher incidence of thyroid disorders in patients with type 2 diabetes compared to general population.
Both diseases not only have a high coincidence, but also significantly affect each other. Deficiency and excess of thyroid hormones disrupt glucose metabolism.
The hyperglycaemic effect, which leads to impaired glucose tolerance, usually predominates. In patients with type 1 diabetes mellitus, more frequent hypoglycaemia may occur in new onset hypothyroidism.