Hypothyroidism Simulating Polymyositis

C. Salvarani Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

N. Marcello Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

P. Macchioni Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

D. Guidetti Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

F. Rossi Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

I. Iori Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

R. Baricchi Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

L. Ghirelli Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

I. Portioli Department of Medicine 2 (Rheumatologic Unit), Department of Neurology, USL N9, 42100, Reggio Emilia, Italy

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Abstract

Musculoskeletal symptoms may predominate and may be the presenting feature of hypothyroidism. Hochberg et al. (1) reported on 2 hypothyroid patients with a muscular syndrome presenting clinical and laboratory features indistinguishable from polymyositis. We also have observed 2 patients in whom muscle weakness and tenderness combined with marked elevation of serum muscle enzymes led us to a misdiagnosis of polymyositis.

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Hypothyroidism Simulating Polymyositis

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Hypothyroidism Simulating Polymyositis

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