Journal of the Korean Neurological Association  2002;20(1):93-96

A Case of Hypothyroid Myopathy due to Hashimoto's Thyroiditis.

Byung Ki KIM 1 ; Moon Ku HAN ; Sang Soo LEE ; Hwa Young LEE ; Gun Sei OH ; Hee Jung SONG

Affiliations

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Keywords

Myopathy; Hypothyroidism; Hashimoto's thyroiditis

Country

Republic of Korea

Language

Korean

Abstract

A 59-year-old man was admitted because of progressive proximal muscle weakness over 4 months. Serum creatine kinase was markedly increased and electromyography revealed myopathic pattern. Muscle biopsy showed nonspecific myopathic changes. No inflammatory change was shown. Thyroid function tests revealed very low thyroxine and low triiodo-L-thyronine, whereas thyroid-stimulating hormone was greatly increased as well as serum anti-thyroglobulin and microsome antibodies. The patient had hypothyroid myopathy due to Hashimoto's thyroiditis, which improved with L-thyroxine replacement.