Sarcopenia: how to measure, when and why.

Area of Science:

• Gerontology
• Radiology
• Muscle Physiology

Background:

• Sarcopenia is characterized by loss of skeletal muscle mass and function, impacting mobility and overall health.
• The European Working Group on Sarcopenia in Older People updated sarcopenia definition in 2018, emphasizing muscle strength loss.
• Skeletal muscle's role extends beyond mobility; it functions as an endocrine organ influencing systemic health.

Purpose of the Study:

• To provide an updated overview of clinical knowledge regarding sarcopenia.
• To explore the advantages and limitations of radiological methods in sarcopenia evaluation.
• To discuss current controversies in radiological sarcopenia assessment.

Main Methods:

• Review of major body composition imaging modalities: dual-energy X-ray absorptiometry (DXA), CT, and MRI.
• Analysis of scientific and clinical insights on sarcopenia definition and diagnosis.
• Discussion of standardization, measurement methods, and diagnostic cutoff points in radiological assessment.

Main Results:

• Radiology shows promise for early sarcopenia detection and treatment improvement.
• Imaging modalities like DXA, CT, and MRI can assess body composition relevant to sarcopenia.
• Challenges include lack of consensus, varied measurement techniques, and undefined radiological cutoff points.

Conclusions:

• Radiological evaluation of sarcopenia can enhance the radiologist's role in clinical practice.
• Standardized radiological approaches are needed for accurate and impactful sarcopenia assessment.
• Integrating radiology into sarcopenia management can lead to improved patient outcomes and evidence-based practice.