Tumor-associated metabolic alterations, malnutrition, inflammation, muscle wasting, and body composition changes including skeletal muscle quality and visceral fat accumulation
Target Population
Patients with pathologically confirmed resectable PDAC undergoing upfront surgery
Care Setting
Surgical oncology and perioperative management in tertiary hospitals with CT imaging capabilities
Key Highlights
Early recurrence (ER) within 1 year after surgery occurs in approximately 50% of patients and is associated with poor prognosis.
CT imaging at the L3 vertebra level enables quantification of body composition parameters such as skeletal muscle index (SMI), visceral fat index (VFI), subcutaneous fat index (SFI), and intermuscular fat index (IMFI).
Reduced skeletal muscle quality and increased visceral fat are strongly linked to early recurrence and worse long-term survival in PDAC.
Guideline-Based Recommendations
Diagnosis
Use contrast-enhanced CT for PDAC diagnosis and staging, including assessment of tumor size, location, and resectability.
Perform CT-based body composition analysis within 2 weeks prior to surgery to quantify skeletal muscle and fat tissue using standardized Hounsfield unit thresholds.
Management
Consider individualized surveillance and treatment strategies based on body composition parameters to address risk of early recurrence.
Exclude patients with macroscopic margin-positive resection (R2), preoperative neoadjuvant therapy, synchronous distant metastases, or poor-quality imaging from upfront surgery cohorts.
Monitoring & Follow-up
Conduct postoperative surveillance with contrast-enhanced CT and serum CA 19-9 every 3 months for the first 2 years, then every 6 months thereafter.
Use MRI and/or PET scans to evaluate ambiguous findings suggestive of recurrence.
Define early recurrence as tumor relapse within 1 year post-resection confirmed by radiological or pathological evidence.
Risks
High risk of tumor relapse (up to 80% within 5 years), with early recurrence in approximately 50% of patients.
Poor prognosis associated with early recurrence and adverse body composition profiles including low skeletal muscle quality and high visceral fat.
Patient & Prescribing Data
Patients with resectable PDAC undergoing upfront surgical resection without prior neoadjuvant therapy
Body composition parameters derived from preoperative CT imaging can inform risk stratification for early recurrence and guide personalized postoperative surveillance and treatment planning.
Clinical Best Practices
Incorporate routine CT-based body composition analysis into preoperative assessment for PDAC patients to identify those at higher risk of early recurrence.
Use standardized imaging protocols and software (e.g., SliceOMatic V5.0) to measure skeletal muscle and fat areas at the L3 vertebral level.
Implement multidisciplinary approaches integrating body composition data with tumor markers and pathological findings to optimize individualized patient management.
