Coexistência de hipotiroidismo e polimiosite Coexistence of hypothyroidism and polymyositis

Abstract

Pacientes com hipotiroidismo freqüentemente apresentam sintomas músculo-esqueléticos e aumento de enzimas musculares, como a creatinaquinase (CK). Com o tratamento hormonal adequado é incomum ocorrer grandes aumentos de CK e manutenção de queixas musculares. Este trabalho relata o caso de uma paciente com hipotiroidismo, queixa de fraqueza muscular proximal e aumento de CK, sem melhora clínica com uso de levotiroxina. O diagnóstico de polimiosite foi confirmado por eletroneuromiografia e biópsia muscular. Após tratamento com prednisona e metotrexato, além de adequação da dose de levotiroxina, houve melhora clínica significativa e normalização da CK.Patients with hypothyroidism frequently present with musculoskeletal complaints and elevated serum levels of muscle enzymes, like creatine kinase (CK). With adequate hormonal treatment, the maintenance of high values of CK and muscle symptoms are uncommon. This work reports a 47-year-old woman with hypothyroidism, proximal muscle weakness and increased CK, who didn't improved with levothyroxine treatment. The diagnosis of polymyositis was based on electromyography and muscle biopsy. After treatment with prednisone plus methotrexate and increase of the levothyroxine dose, there were a clinical improvement and a normalization of CK values.

Keywords

• hipotiroidismo
• polimiosite
• miopatias
• fraqueza muscular
• Hypothyroidism
• polymyositis
• myopathies
• muscle weakness