Hashimoto thyroiditis is the most common thyroid disease. This form of pathology has a diverse clinical picture, including neuropsychiatric disorders. There are frequent cases of comorbidity of autoimmune thyroiditis and psychiatric forms of pathology, along with such a nosological entity as Hashimotos encephalopathy (aka: Steroid-responsive encephalopathy of autoimmune thyroiditis), characterized by an increased level of antithyroid autoantibodies and various mental disorders, with still unclear pathogenesis. The question arises, how to regard patients with psychiatric disorders and Hashimoto thyroiditis either as patients having autoimmune thyroiditis, comorbid with psychiatric forms of pathology, or as patients with Hashimotos encephalopathy? We studied groups of patients with autoimmune thyroiditis free from any psychiatric disorders, autoimmune thyroiditis comorbid with psychiatric forms of pathology, and a group of healthy donors similar as regards to their age and sex. We also studied medical history, clinical manifestations of the disease, instrumental data and the serum levels of thyrotropin, thyroid hormones, various antithyroid autoantibodies, and prolactin. We analyzed the correlation of laboratory and instrumental parameters and clinical data in all groups of patients. Therewas a significant relationship (p 0,05) between various psychiatric symptoms and a decreased level of free thyroxine, an increased level of thyroid stimulating hormone (TSH), an increased level of prolactin and an increased volume of a thyroid gland. Asignificant relationship (p 0,05) was also found between various symptoms of hypothyroidism and a decreased level of free triiodothyronine (FT3), an increased level of antibodies to thyroglobulin (anti-TG Ab), and an increased level of antibodies to thyroid peroxidase (anti-TPO Ab).

Today, autoimmune Hashimoto´s thyroiditis is the most common cause of hypothyroidism. Thyroid hormones are involved in almost all metabolic processes, their deficiency leads to disruption of metabolic processes in all organs and systems, which is the reason for the rich clinical picture and variety of symptoms of hypothyroidism. The deficiency of thyroid hormones also has a significant negative impact on a person's mental health, identifying a diverse clinical picture – from mild disorders to serious mental disorders. For hypothyroidism, such psycho-neurological changes as drowsiness, weakness, loss of interest in the surroundings, loss of memory and intelligence are also characteristic. Delirious and delirious-hallucinatory conditions are described, as well as anxious and depressive conditions. Hypothyroid psychoneurological disorders have recently become more common, and therefore their diagnosis and correction are becoming more urgent. Persons with hypothyroi dism often mistakenly go not to the endocrinologist, but to a psychiatrist and receive therapy, but psychotropic drugs and antidepressants in hypothyroidism don´t give the proper effect and even are contraindicated. Hypocalcemia is very often observed with Hashimoto´s thyroiditis, it can be explained by autoimmune parathyroiditis with a hypoparathyroid clinic, that is, with autoimmune thyroiditis, the function of parathyroid glands may be disrupted. The article presents the results of our own research. A group of patients with autoimmune thyroiditis and hypothyroidism was examined. Complaints, anamnesis and clinic of the disease, levels of TSH, thyroid hormones, total and ionized calcium, inorganic phosphorus, vitamin D3 were studied.