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Localized polymyositis associated with chronic thyroiditis

J Fujitake1, Y Ishikawa, S Ishimaru

  • 1Department of Neurology and Endocrinology, Kyoto City Hospital, Japan.

The Journal of Rheumatology
|June 1, 1994
PubMed
Summary
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Localized polymyositis, a rare muscle inflammation, was found with chronic thyroiditis. Magnetic resonance imaging (MRI) precisely identified the gastrocnemius muscle lesion, and steroid treatment proved effective.

Area of Science:

  • Neurology
  • Endocrinology
  • Radiology

Background:

  • Polymyositis is an idiopathic inflammatory myopathy characterized by symmetrical proximal muscle weakness.
  • Chronic thyroiditis is an autoimmune disease affecting the thyroid gland.
  • Localized polymyositis is a rare variant presenting as a focal muscle lesion.

Observation:

  • A case of localized polymyositis was identified in the left gastrocnemius muscle.
  • The patient also presented with chronic thyroiditis.
  • Imaging studies, including computerized tomography and magnetic resonance imaging (MRI), were utilized.

Findings:

  • MRI effectively delineated the extent and severity of the muscle lesion in the gastrocnemius.
  • The localized polymyositis was successfully treated with steroid administration.

Related Experiment Videos

  • The coexistence of localized polymyositis and chronic thyroiditis was noted.

    • Implications:

    • This case highlights the utility of MRI in diagnosing and assessing localized polymyositis.
    • Steroid therapy demonstrates efficacy in managing this specific presentation.
    • Further research may explore potential links between autoimmune muscle and thyroid conditions.