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Pancreatic necrosis volume - A new imaging biomarker of acute pancreatitis severity
Jose Pamies-Guilabert1, Adolfo Del Val Antoñana2, Javier Jesús Collado1
1Medical Imaging Department, University and Polytechnic Hospital la Fe, Valencia, Spain.
Objective:
Determine if the pancreatic necrosis volume (PNV) in computed tomography scan (CT) is a useful marker to predict the severity of acute pancreatitis (AP) comparing its predictive value with current clinical scoring systems.
Methods:
This retrospective study was conducted in a tertiary hospital, including patients hospitalized with AP during the period of 24 months. Demographic, clinical data, length of hospital stay and analytical parameters were collected from the hospital clinical information digital systems. Other information on the severity of the disease was also reviewed, including BISAP score, organ failure (OF) or admission to the ICU, as well as, complications during hospitalization as infected necrotic collections, surgical procedure or death. The quantification of the necrosis volume, CT severity index and Balthazar score were assessed in the CT studies. ROC curves were carried to compare the correlation between different scoring systems and the acute complications.
Results:
This study included 163 patients with AP. The calculated average value of PNV in the CT studies was 242 cc (0-1575 cc). PNV showed lineal correlation with hospital stay (Pearson 0.696) and statistically significant association with acute complications as OF, multiple organ failure, infection, need of treatment or hospitalization at ICU (P < 0.05). The optimal cut-off value for predicting complications of necrosis as infections or need of surgery treatments was 75 cc. Sensibility and specificity were 100 % and 78 %, respectively. ROC curves showed that PNV was the best radiological finding correlated with AP complications.
Conclusion:
Necrosis volume is a radiological biomarker highly correlated with AP complications.
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