Long-Term Evolution of Skeletal Muscle Quantity and Quality After Curative-Intent Colon Cancer Surgery: A...

Area of Science:

• Oncology
• Radiology
• Geriatrics

Background:

• Computed tomography (CT)-based sarcopenia is a key prognostic factor for surgical outcomes.
• Longitudinal studies on skeletal muscle markers post-colon cancer surgery are limited.
• The relationship between CT-defined sarcopenia and patient survival remains unclear.

Purpose of the Study:

• To investigate the longitudinal changes in CT-based sarcopenia markers after colon cancer surgery.
• To assess the correlation between these markers and overall survival.

Main Methods:

• Retrospective cohort study of 102 patients undergoing curative-intent colon cancer surgery.
• Skeletal muscle area (SMA), skeletal muscle index (SMI), skeletal muscle radiation attenuation (SMRA), and intermuscular adipose tissue (IMAT) area and index (IMATI) were measured at baseline and 6, 12, and 24 months post-surgery.
• Cox's proportional hazards regression analysis was used to evaluate survival correlations.

Main Results:

• CT-based sarcopenia markers (SMA, SMI, SMRA, IMAT, IMATI) showed statistical stability over 24 months.
• Age and ASA score were independent predictors of mortality.
• Greater changes in IMAT area and IMATI at 12 months were associated with reduced mortality.

Conclusions:

• CT-defined skeletal muscle quantity and quality markers are stable post-colon cancer surgery.
• Preoperative sarcopenia markers did not predict overall survival.
• Changes in IMAT may offer prognostic insights, warranting further investigation in larger cohorts.