Polymyositis presenting with respiratory failure

Area of Science:

• Neurology
• Pulmonology
• Pathology

Background:

• Polymyositis is an idiopathic inflammatory myopathy characterized by symmetrical proximal muscle weakness.
• Respiratory muscle involvement in polymyositis is uncommon but can lead to severe respiratory compromise.

Purpose of the Study:

• To present a case of polymyositis with fatal respiratory failure.
• To emphasize the potential for diaphragm and intercostal muscle involvement in polymyositis.

Main Methods:

• Clinical case presentation.
• Review of patient history, symptoms, and diagnostic findings.
• Postmortem examination to determine the cause of death.

Main Results:

• A 36-year-old woman developed progressive dyspnea and respiratory failure due to respiratory muscle paralysis.
• Muscle biopsy confirmed polymyositis.
• Postmortem revealed polymyositis predominantly affecting the diaphragm and intercostal muscles, leading to sudden death.

Conclusions:

• Polymyositis can present with severe respiratory compromise and be fatal.
• Early recognition and management of respiratory muscle involvement in polymyositis are crucial.