[Hypothyroid myopathy in a young adult].

We describe here the case of a young man admitted to our department for asthenia and diffuse myalgia. Because of persistently increasing aminotransferase levels over the preceding 2 years, he had undergone a number of diagnostic procedures to evaluate liver function. On admission to our department, the patient suffered from asthenia, myalgia, notable hair loss and sinus bradycardia. Laboratory examinations confirmed severe primary hypothyroidism with high serum levels of aminotransferase, aldolase and creatine-phosphokinase attributable to thyroprivic myopathy. The thyroid deficit was caused by autoimmune atrophic thyroiditis. Treated with levothyroxine, the patient recovered fully from his illness, his normal metabolic state was restored, and his serum aminotransferase level returned to normal.