Myalgia in myositis and myopathies

Area of Science:

• Neurology
• Musculoskeletal Disorders

Background:

• Myalgia is a prevalent symptom across diverse neuromuscular conditions, including metabolic, inflammatory, dystrophic, and myotonic myopathies.
• It substantially diminishes patients' quality of life, necessitating effective diagnostic and therapeutic strategies.

Purpose of the Study:

• To comprehensively review the symptoms, diagnostic approaches, and therapeutic interventions for neuromuscular disorders presenting with myalgia.
• To provide an overview of current management strategies for myalgia and associated symptoms.

Main Methods:

• Literature review of symptoms, diagnostic workup, and treatment options for myalgia in neuromuscular disorders.
• Synthesis of information on diagnostic tools including medical history, neurologic assessment, laboratory tests, EMG, nerve conduction studies, imaging, genetic testing, and muscle biopsy.

Main Results:

• Associated symptoms like weakness, cramps, myotonia, and pain characteristics aid in diagnosis.
• Extramuscular signs, such as erythema in dermatomyositis, can be diagnostic clues.
• Treatment focuses on addressing underlying causes (e.g., inflammation, hypothyroidism) and symptomatic relief.

Conclusions:

• Accurate diagnosis of myalgia relies on a combination of clinical presentation, diagnostic tests, and sometimes invasive procedures.
• Therapeutic strategies encompass disease-modifying treatments and symptomatic management using medications like mexiletine, carbamazepine, phenytoin, pregabalin, gabapentin, or amitriptyline.