Muscle Health and Prognosis in Patients With Cancer: New Insights.

Area of Science:

• Oncology
• Geriatrics
• Muscle Physiology

Background:

• Reduced muscle mass and impaired composition are linked to poor outcomes in cancer patients.
• Muscle strength (dynapenia) may be a more critical prognostic indicator due to easier clinical assessment.
• Computed tomography (CT) assessments of muscle may not fully capture physiological changes.

Purpose of the Study:

• To investigate the predictive value of low muscle mass, impaired composition, weight loss (WL), and low muscle strength for mortality in cancer patients.
• To evaluate the combined predictive power of these factors.
• To compare the prognostic relevance of muscle strength and WL versus muscle mass and composition.

Main Methods:

• Pooled baseline data from 477 cancer patients (Brazil, Canada, Italy).
• Assessed muscle mass and radiodensity (L3 CT), 6-month unintentional WL (≥10%), and handgrip strength.
• Categorized patients using sex and BMI-specific cutoffs; followed for at least 12 months.

Main Results:

• Weight loss (≥10%) and low handgrip strength independently predicted poorer prognosis.
• Mortality risk increased across categories of low handgrip strength and WL.
• Combinations of WL (≥10%) and low handgrip strength were significantly associated with higher mortality.
• Low muscle mass/radiodensity only worsened prognosis when combined with both WL and low strength.

Conclusions:

• Muscle strength and weight loss are more potent predictors of survival in cancer patients than muscle mass and composition.
• These findings highlight the clinical relevance of easily assessed markers of muscle health for prognostication.