Resection of borderline resectable pancreatic cancer after neoadjuvant chemoradiation does not depend on improved radiographic appearance of tumor-vessel relationships

Journal of Radiation Oncology
Avani S DholakiaJoseph M Herman

Abstract

Neoadjuvant therapy increases rates of margin-negative resection of borderline resectable pancreatic ductal adenocarcinoma (BL-PDAC). Criteria for BL-PDAC resection following neoadjuvant chemotherapy and radiation therapy (NCRT) have not been clearly defined. Fifty consecutive patients with BL-PDAC who received NCRT from 2007 to 2012 were identified. Computed tomography (CT) scans pre- and post-treatment were centrally reviewed. Twenty-nine patients (58 %) underwent resection following NCRT, while 21 (42 %) remained unresected. Patients selected for and successfully undergoing resection were more likely to have better performance status and absence of the following features on pre- and post-treatment CT: superior mesenteric vein/portal vein encasement, superior mesenteric artery involvement, tumor involvement of two or more vessels, and questionable/overt metastases (all p <0.05). Tumor volume and degree of tumor-vessel involvement did not significantly change in both groups after NCRT (all p > 0.05). The median overall survival was 22.9 months in resected versus 13.0 months in unresected patients (p < 0.001). Of patients undergoing resection, 93 % were margin-negative, 72 % were node-negative, and 54 % demonstrated moderate pa...Continue Reading

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