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Annals of Indian Academy of Neurology
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ORIGINAL ARTICLE
Year : 2014  |  Volume : 17  |  Issue : 3  |  Page : 298-302

Myopathies of endocrine disorders: A prospective clinical and biochemical study


Department of Neurology, Gauhati Medical College and Hospital, Guwahati, Assam, India

Correspondence Address:
Ashok K Kayal
Department of Neurology, Gauhati medical College and Hospital, Indrapur, Guwahati, Assam
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-2327.138505

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Introduction: Major categories of endocrine myopathy include those associated with: Adrenal dysfunction (as in Cushing's disease or steroid myopathy); thyroid dysfunction (as in myxedema coma or thyrotoxic myopathy); vitamin D deficiency; parathyroid dysfunction; and pituitary dysfunction. Steroid myopathy is the most common endocrine myopathy. Objective: To study the etiology, varied presentations, and outcome after therapy of patients with endocrine myopathies. Materials and Methods: Myopathy was evaluated by the standard clinical procedures: Detailed clinical history, manual muscle strength testing, and creatine phosphokinase (CPK). Endocrine disorders were diagnosed as per clinical features and biochemical parameters. The treatment was given to patients as per underlying endocrine disease. Myopathy was assessed before and after treatment. Results: Out of the 37 patients who were diagnosed with endocrine myopathies, thyroid dysfunction was the most common cause (17 cases), followed by vitamin D deficiency in nine, adrenal dysfunction in six, parathyroid dysfunction in three, and pituitary dysfunction in two. Some patients had atypical presentation (repeated falls in one, tongue fasciculations in one, neck weakness in five, one with ptosis and facial weakness, asymmetrical onset in one, and calf hypertrophy in one. The serum creatine kinase (CK) concentration did not correlate with muscle weakness. Following the treatment regimen which was specific for a given myopathy, 26 patients recovered fully. Conclusion: We found varied clinical presentations of endocrine myopathies. All the patients with neuromuscular complaints should be investigated for endocrine causes because significant number of them recovers fully with specific treatment.


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