An Unusual Case of Rheumatoid Arthritis with Hypothyroidism Presenting with Inflammatory Myopathy (Polymyositis)

In this case, the patient was diagnosed with rheumatoid arthritis 5 years back. She had also developed symptomatic autoimmune hypothyroidism before 2 years which was managed by levothyroxine. She presented this time with inflammatory myopathy. The search of literature revealed very few cases having all these together. Inflammatory myopathies are heterogeneous group of disorders which include polymyositis (PM), dermatomyositis, and inclusion body myositis. Many features of these disorders overlap. These three conditions (rheumatoid arthritis, hypothyroidism, and PM) have similarities in genetic etiology and presentation. The association between them is discussed here