Prevalence of psychiatric disorders in thyroid diseased patients.

Several studies have underlined the high prevalence of psychiatric symptoms and disorders in thyroid diseases. The aim of this study was to evaluate the prevalence of psychiatric disorders in 93 inpatients affected by different thyroid diseases during their lifetimes, by means of a standardized instrument, i.e., the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders-III-Revised, Upjohn Version (SCID-UP-R). The results showed higher rates of panic disorder, simple phobia, obsessive-compulsive disorder, major depressive disorder, bipolar disorder and cyclothymia in thyroid patients than in the general population. These findings would suggest that the co-occurrence of psychiatric and thyroid diseases may be the result of common biochemical abnormalities

Transient psychosis due to painless thyroiditis in a patient with anxiety disorder: a case report

<p>Abstract</p> <p>Introduction</p> <p>There are few reports on thyrotoxic psychosis caused by diseases other than Graves' disease or toxic nodular goiter.</p> <p>Case presentation</p> <p>A 64-year-old Japanese woman was treated for anxiety disorder in our clinic for 10 years. She had five episodes of transient psychosis during the first five years. When she developed psychosis without neck pain 10 years after her first visit, a laboratory reexamination revealed that she had subclinical hyperthyroidism, and tested positive for antithyroid autoantibodies, negative for thyroid stimulating hormone receptor antibody and had decreased radioactive iodine uptake. She was diagnosed as having painless thyroiditis. The hyperthyroidism disappeared within a month, and the psychosis lasted for three months.</p> <p>Conclusion</p> <p>To the best of our knowledge, this is the first report of psychosis due to painless thyroiditis-induced hyperthyroidism. Physical symptoms of painless thyroiditis are often so mild that careful differential diagnosis is necessary in the cases of transient psychosis.</p

Physiological cybernetics: Methods and applications

In this paper, it is discussed how physiological systems can be regulated by using the control theory as well as methodologies of system analysis, modeling, and identification. In physiology, the natural tendency to homeostasis, despite changes in the environments, implies a feedback-control scheme. The study of the natural regulation in physiological systems could help in its replacing when pathological situations are present. The basic concepts of homeostasis, modeling and control are here recalled, and some case studies are describe

Subclinical hypothyroidism: psychiatric disorders and symptoms Hipotireoidismo subclínico: transtornos e sintomas psiquiátricos

OBJECTIVE: To evaluate the prevalence of psychiatric disorders and symptoms in patients with subclinical hypothyroidism. METHOD: Ninety-four outpatients with at least two elevated serum thyrotrophin levels (> 4 µU/ml) and normal FT4, and 43 euthyroid outpatients, both groups from HUCFF-UFRJ, were evaluated. Psychiatric diagnosis was based on the Structured Clinical Interview Diagnostic for the DSM-IV axis I (SCID-I/DSM-IV), the psychopathological symptoms on Hamilton anxiety and depression scales, and the Beck Inventory. RESULTS: Our data showed an increased prevalence of psychiatric disorders in the subclinical hypothyroidism patients when compared to the euthyroid group (45.7% vs 25.6%; p = 0.025), mood disorders being the most frequent. The prevalence of depressive symptoms based on Beck's Scale among subclinical hypothyroidism patients was about 2.3 times higher than among euthyroid ones (45.6% vs 20.9%, p = 0.006). Anxiety symptoms were also more frequent among subclinical hypothyroidism patients (87.0% vs 60.5%, p < 0.001), mainly clinical anxiety (44.6% vs 23.3%; p = 0.001). CONCLUSION: Our results showed a significant association of subclinical hypothyroidism with psychiatric disorders and an increased frequency of subsyndromic depression and anxiety symptoms in subclinical hypothyroidism in relation to the euthyroid group.<br>OBJETIVO: Avaliar a prevalência de sintomas e alterações psiquiátricas em pacientes com hipotireoidismo subclínico. MÉTODO: Foram estudados 94 pacientes ambulatoriais com pelo menos duas dosagens plasmáticas elevadas de tireotropina (> 4 µU/ml) e com T4 livre normal e, 43 eutireoidianos, ambos os grupos do HUCFF-UFRJ. Para diagnóstico psiquiátrico foi utilizada a entrevista clínica estruturada do eixo I (SCID-I/DSM-IV) e, para sintomas psicopatológicos, as escalas de ansiedade e depressão de Hamilton (HAM-A e HAM-D) e inventário de Beck. RESULTADOS: Encontramos uma prevalência aumentada de transtornos psiquiátricos no hipotireoidismo subclínico em comparação ao grupo eutireoidiano (45,7% vs 25,6%; p = 0,025), sendo o transtorno do humor o de maior freqüência. Sintomas de depressão no grupo com hipotireoidismo subclínico foram cerca de 2,3 vezes mais freqüentes que entre os eutireoidianos (45,6% vs 20,9%; p = 0,006) quando o instrumento utilizado foi a escala de Beck. Da mesma forma, sintomas de ansiedade também foram mais freqüentes no hipotireoidismo subclínico (87,0% vs 60,5%; p < 0,001), principalmente ansiedade clínica (44,6% vs 23,3%; p = 0,001). CONCLUSÃO: Os resultados indicaram uma associação do hipotireoidismo subclínico com os transtornos psiquiátricos, além de uma freqüência aumentada de sintomas de depressão e ansiedade subsindrômicos em relação ao grupo eutireoidiano

Unexplained somatic symptoms during major depression: prevalence and clinical impact in a national sample of Italian psychiatric outpatients

Background: The aim of this study was to explore the prevalence and impact of unexplained somatic symptoms during major depression. Sampling and Methods: A total of 560 consecutive outpatients with a major depressive episode according to the DSM-IV (text revision) were evaluated in 30 psychiatric facilities throughout Italy. 'Unexplained' somatic symptoms were evaluated using the 30-item Somatic Symptoms Checklist (SSCL-30). Somatic symptoms were considered explained if they were best accounted for as coming from a concomitant physical illness or side effects. Patients evaluated their own mood symptomatology using the Zung questionnaires for depression and anxiety and the Hypomania Checklist-32. Results: According to the SSCL-30, only 90 subjects (16.1%) had no unexplained somatic symptoms, while 231 (41.3%) had 1-5 unexplained symptoms and 239 (42.7%) had more than 5. Asthenia was the most commonly observed unexplained somatic symptom (53% of patients). Unexplained somatic symptoms were more common in females and among those suffering from major depression and depression not otherwise specified rather than in patients with recurrent major depression and bipolar disorders. No relationship between unexplained somatic symptoms and hypomanic features was observed. Conclusions: The presence of a large number of unexplained somatic symptoms is associated with more severe depression and higher rates of misdiagnosis and inappropriate treatment