Late-onset primary muscle diseases mimicking sarcopenia

Area of Science:

• Geriatric Medicine
• Neurology
• Muscle Physiology

Background:

• Sarcopenia, an age-related loss of muscle mass and function, and late-onset primary myopathies present overlapping symptoms.
• Differentiating these conditions is crucial for appropriate management in the elderly population.

Purpose of the Study:

• To review the evolution of sarcopenia diagnostic criteria.
• To outline late-onset primary myopathies that mimic sarcopenia.
• To provide diagnostic algorithms for differentiating these muscle disorders.

Main Methods:

• Literature review of diagnostic criteria for sarcopenia.
• Analysis of common pathogenic mechanisms between sarcopenia and myopathies.
• Examination of diagnostic approaches for late-onset myopathies.

Main Results:

• Diagnostic criteria for sarcopenia have evolved, with various expert proposals.
• Late-onset myopathies (e.g., inclusion body myositis, muscular dystrophies) share mechanisms with sarcopenia.
• Clinical evaluation, history, physical exam, and testing are vital for diagnosis.

Conclusions:

• Accurate differentiation between sarcopenia and primary myopathies is essential for tailored treatment.
• Understanding shared pathomechanisms aids in diagnosis.
• This review offers guidance for clinical evaluation and diagnostic algorithms.