Background: The accurate determination of resectability in patients with pancreatic cancer is a main goal of preoperative imaging after diagnosis. With advances in surgical techniques, the definition of resectability is in evolution, and it is crucial for radiologists to have an understanding of findings that are relevant to the determination of resectability. The parallel advancements in imaging technology are aiming to improve the ability of imaging modalities to predict resectability. Fifty patients with pancreatic ductal adenocarcinoma (PDAC) were analyzed for capability of apparent diffusion coefficient (ADC) values to predict possible tumor resectability. The patients were classified into resectable and unresectable groups based on magnetic resonance (MR) imaging criteria. Logistic regression analysis was used. Receiver operator characteristic (ROC) curve was reconstructed. Results: Out of different prognostic variables, tumor size was the only significant predictor of tumor resectability. ROC curve analysis showed that ADC value is not a discriminator of tumor resectability (area under the curve (AUC) = 0.5, P value = 0.452). Conclusions: In patients with pancreatic adenocarcinoma, ADC values might be unreliable for prediction of tumor resectability in clinical practice. Low ADC value in such tumors is more attributed to fibrotic nature rather than grade of the tumor.
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