Abstract
Background
Little is known about changes in body composition that may occur during neoadjuvant therapy for pancreatic cancer. This study was designed to characterize these changes and their potential relationships with therapeutic outcomes.
Methods
The study population consisted of patients with potentially resectable pancreatic cancer treated on a phase II trial of neoadjuvant chemotherapy and chemoradiation. Skeletal muscle and adipose tissue compartments were measured before and after administration of neoadjuvant therapy using SliceOMatic software (TomoVision, 2012) and protocol-mandated CT scans. Sarcopenia was defined using gender-adjusted norms.
Results
Among 89 eligible patients, 46 (52 %) patients met anthropometric criteria for sarcopenia prior to the initiation of neoadjuvant therapy. Further depletion of skeletal muscle, visceral adipose tissue, and subcutaneous adipose tissue occurred during neoadjuvant therapy, but these losses did not preclude the performance of potentially curative surgery. Degree of skeletal muscle loss correlated with disease-free survival while visceral adipose loss was associated with overall and progression-free survival. However, completion of all therapy, including pancreatectomy, was the only independently significant predictor of outcome in a multivariate analysis of overall survival.
Discussion
These data suggest that body composition analysis of standard CT images may provide clinically relevant information for patients with potentially resectable pancreatic cancer who receive neoadjuvant therapy. Anthropometric changes must be considered in the design of preoperative therapy regimens, and further efforts should focus on maintenance of muscle and visceral adipose tissue in the preoperative setting.
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Acknowledgment
Supported by the Khalifa Bin Zayed Al Nahyan Foundation and by the Various Donor Pancreatic Research Fund at the University of Texas MD Anderson Cancer Center. ABC is also supported by a grant from the Foundation of Surgical Fellowships. RS is part of the Biostatistics Shared Resource supported by the NIH/NCI under award number P30CA016672.
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10434_2014_4285_MOESM1_ESM.tif
Figure S1. Anthropometric analysis. The cross sectional areas of the skeletal muscle (red), subcutaneous adipose tissue (light blue) and visceral adipose tissue (dark blue) compartments were computed using CT images obtained as part of routine care, and were standardized to the square of the height in meters. Supplementary material 1 (TIFF 831 kb)
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Cooper, A.B., Slack, R., Fogelman, D. et al. Characterization of Anthropometric Changes that Occur During Neoadjuvant Therapy for Potentially Resectable Pancreatic Cancer. Ann Surg Oncol 22, 2416–2423 (2015). https://doi.org/10.1245/s10434-014-4285-2
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DOI: https://doi.org/10.1245/s10434-014-4285-2