In patients presenting with acute mania & psychosis, it is important to rule out organic cause of their symptoms. Neuropsychiatric problems include affective disorders, disturbances in cognition and psychosis. Mania is commonly associated with hyperthyroidism, But Hypothyroidism is a medical condition commonly encountered in a variety of the clinical settings. Patients with severe hypothyroidism may present with psychosis and less commonly with symptoms of mania. We report a case of 37 year old male presenting with acute mania & psychosis, in context of severe hypothyroidism.
KEY WORDS:
Hypothyroidism, Mania, Psychosis, Bipolar disorder, Levothyroxine.
INTRODUCTION:
Thyroid dysfunction is known to have a significant impact on mental health. [1] Hypothyroidism, in particular, has been linked to mood disorders and acute psychosis. Though most commonly associated with depression, hypothyroidism has been linked to psychosis since the late 1800s, in reports of delusions and hallucinations in patients with myxedema [2]. More recent literature highlights the incidence and coexistence of hypothyroidism and psychiatric disorders, describing possible mechanisms contributing to the pathophysiology of these disorders [1,3]. The link between hypothyroidism and mania, however, is less clear, with few reports in the literature 4. We present a case report of a 37 year old male presenting with acute onset mania with psychosis and previously undiagnosed severe hypothyroidism.
CASE REPORT:
AB is a 37 year old male, married, Telugu speaking, of rural dwelling, presented to psychiatric OPD with his family members. The attendants of patient complains of patient having inappropriate talk, bizarre behaviour, hyperactivity, sleeplessness, decreased appetite, suspiciousness on others that they are trying to cheat him and symptoms suggestive of acute psychosis of 10 days duration. He had no previous history of psychiatric aliments. AB had stress about his business & property &after that he started to behave abnormally. On enquiring with the family members they reported that he was found screaming in his apartment & had grandiose delusion of the god having entered him. He was restless & became aggressive towards family members. He has spent sleepless nights prior to these symptoms for a few weeks, according to family members. AB began fasting by not eating or drinking to prove he could become a ‘spiritual advisor’. Ab claims that his neighbours & family members are trying to cheat him, he claims that they are trying to plot against him because he has 45 acres of land though in fact he doesn’t have any land. On examination, he was conscious but restless, agitated and inattentive. All these symptoms were for the past 15 days.
Blood work indicated thyroid-stimulating hormone (TSH) > 100 mIU/L (reference value 0.38 to 5.33 mIU/L), Free tri iodothyronine (T3) 0.66ng/mL (reference value 0.70 – 2.04 ng/mL) and free Thyroxin (T4) 3.03 mg/dL(reference value 6.09 – 12.23 mg/dL). Blood investigations indicated elevated level of TSH and decreased free tri iodothyronine (T3).
AB denied previous diagnosis of hypothyroidism or ever having thyroid hormone levels checked. His mother had hypothyroidism managed with levothyroxine. Physical symptoms of hypothyroidism were not apparent and he denied physical symptoms in the past.
His social history included alcohol use and also tobacco use. AB used to consume small amount of alcohol occasionally (30ml once in a blue moon)& 3-4 cigarettes per day. 3 days prior to admission he stopped smoking cigarettes& his last social drink was one month back.
On admission AB was diagnosed with acute mania according to ICD-10 and was started with Tab. Diazepam 5mg HS and Levothyroxine 100 mcg once daily. Once the treatment was started he became more goal directed & less grandiose. He continued, however, to have mild restlessness. We persisted with the same treatment for a few more days.. The endocrinology team increased Levothyroxine to 300 mcg once daily. On this combination, his restlessness stabilized. Psychosis & mania resolved after 2 weeks in hospital without any antipsychotic or mood stabilizer and TSH trended down (83.10 mIU/L) and free T3 (0.70 ng/mL) and free T4 (5.03 mg/dL) trended upward. He was discharged on Levothyroxine 300 mcg daily with no residual psychotic or manic symptoms& diazepam was stopped after a few days.
Discussion:
In the above case rare effect of hypothyroidism was observed. The coexistence of hypothyroidism with depression, bipolar disorder and psychosis has been reported, dating back to the late 1800s. In 1949, Asher reported 14 cases of psychosis with hypothyroidism, 9 of which recovered with thyroid hormone treatment alone [2]. Numerous cases have since linked psychosis to hypothyroidism [2,5]6]. The majority of these cases were managed with a combination of antipsychotic medication and thyroid replacement, however in some cases maintenance therapy included thyroid replacement alone. There was no correlation between the degree of hypothyroidism and the severity of psychiatric symptoms [2]. Psychosis usually remits after 1 week of thyroid replacement, with earlier resolution with the addition of antipsychotic medications [2]. Although psychosis is less commonly associated with hypothyroidism than depression, it is a possible manifestation of the disorder.
Hypothyroidism is a common co-morbidity in bipolar disorder [3]. The association between hypothyroidism and mania is less clear. Mania with concomitant hypothyroidism has been reported in patients previously undiagnosed with psychiatric illness [7,8]. Patients presenting with acute manic episodes and hypothyroidism have improved clinically with a combination of psychotropic medications and thyroid hormone [4]. But in this case patient’s manic condition improved with Levothyroxine alone.
Delineating aetiology of psychiatric symptoms in our patient is a not difficult. AB’s description of manic & psychotic symptoms with no past or family history of bipolar illness would suggest the diagnosis of Acute mania. It is possible that hypothyroidism aggravated an underlying psychiatric illness or induced a manic episode with psychotic features. Treatment with levothyroxine & diazepam was considered for this patient to see whether the patient improves with Levothyroxine alone &to prove mania is secondary to hypothyroidism. It is possible that levothyroxine contributed to improvement of ABs psychotic and manic symptoms. It is surmised psychotic symptoms completely resolved when the TSH,T3, T4 levels returned to normalcy.
CONCLUSION:
Thyroid function should be investigated in all patients presenting with mania or psychotic symptoms. Without an underlying psychiatric illness, thyroid hormone replacement may suffice in the treatment of acute onset psychosis in the context of severe hypothyroidism. However, during an acute manic episode, treatment with thyroid hormone therapy alone may not suffice in some cases, and likely requires concomitant therapy with an antipsychotic or mood stabilizer.
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