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ORIGINAL ARTICLE
Year : 2020  |  Volume : 151  |  Issue : 1  |  Page : 42-46

Thyrotoxic periodic paralysis: A retrospective, observational study from India


1 Department of Endocrinology, Command Hospital, Lucknow, Uttar Pradesh, India
2 Department of Endocrinology, Command Hospital, Kolkata, West Bengal &, India
3 Department of Endocrinology, Army Hospital (R & R), New Delhi, India

Correspondence Address:
Dr Yogesh Kumar
Department of Endocrinology, Command Hospital, Kolkata 700 027, West Bengal
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmr.IJMR_335_18

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Background & objectives: Thyrotoxic periodic paralysis (TPP) is an endocrine emergency presenting with acute-onset flaccid paralysis in a patient having thyrotoxicosis accompanied by hypokalaemia. This study was conducted to evaluate the clinical profile of patients with TPP presenting to three centres in India. Methods: This retrospective, observational study was conducted at three tertiary care Armed Forces medical centres, located at Lucknow, Kolkata and Delhi. The history, clinical features, treatment details and outcomes were evaluated. Results: Of the 244 patients with thyrotoxicosis, 15 were diagnosed with TPP and included in the study. These 15 patients (14 male and 1 female) had 32 episodes of TPP which were analyzed. The mean age was 30.2±6.2 yr (range: 21-39), and overt thyrotoxicosis was seen in all patients except one who had subclinical hyperthyroidism. Graves' disease was the most common cause of thyrotoxicosis (13/15) and the remaining two patients had subacute thyroiditis and gestational thyrotoxicosis. Hypokalaemia (serum potassium <3.5 mmol/l) was seen in 12 patients, and the mean serum potassium was 3.2±0.9 mmol/l (range: 2.1-4.9). All patients had flaccid weakness, predominantly involving the lower limb with no bulbar, respiratory or cranial nerve involvement. The average duration of paralysis was 10.6±5.7 h (range: 3-28 h). Interpretation & conclusions: Our study demonstrated an early age of presentation and presence of clinical and biochemical thyrotoxicosis in majority of patients with TPP. Hypokalaemia may not always be evident in patients with TPP.


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