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Year : 2020  |  Volume : 9  |  Issue : 3  |  Page : 193-199

Development of a new risk score for invasive cancer in branch-duct intraductal papillary mucinous neoplasms according to morphological characterization by EUS

1 Department of Gastroenterology, Complejo Hospitalario de Navarra, Pamplona, Spain
2 Department of Hepatogastroenterology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvaine, Brussels, Belgium; Department of Gastroenterology, Georges-Pompidou European Hospital, Paris, France
3 Department of Gastroenterology, Hospital Universitario de Santiago de Compostela, Santiago de Compostela, Santiago, Spain
4 Department of Gastroenterology, Hospital Universitario de Cruces, Bilbao, Spain

Correspondence Address:
Dr. Laura Uribarri-Gonzalez
Calle de Irunlarrea, 3, 31008 Pamplona, Navarra, Pamplona
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/eus.eus_11_20

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Background and Objective: The management of branch-duct intraductal papillary mucinous neoplasms (BD-IPMNs) is determined by a number of guidelines. The current weight of risk factors by EUS predicting invasive cancer is unknown. The aim of this study is to develop a risk score for early prediction of invasive cancer according to morphological characterization by EUS in a surgical cohort. Materials and Methods: This is an observational, multicenter retrospective study. All consecutive patients with a histologically proven BD-IPMN who underwent previous EUS between 2005 and 2017 were included. Morphological features by EUS were evaluated. A score using a logistic regression model was performed to assess the risk of invasive cancer. Results: Of 335 patients who underwent pancreatic surgery, 131 (median age: 66 years, 50.4% – male) were included. By multivariable analysis, lymph nodes (odds ratio [OR]: 17.7 [confidence interval (CI) 95%: 2.8–112.6], P = 0.002, 4 points), main pancreatic duct ≥10 mm (OR: 8.6 [CI 95%: 1.9–39.5], P = 0.006, 2 points), abrupt change of pancreatic duct (OR: 5.5 [CI 95%: 1.4–22.2], P = 0.016, 1.5 points), and solid component (OR: 4.2 [CI 95%: 1.3–13.6], P = 0.017, 1 point) were independent factors associated with invasive cancer and included in the model. The following categories of the score (0–8.5 points) – A (0–1), B (1.5–3), C (3.5–5), and D (5.5–8.5 points) – presented a positive predictive value of 8.5%, 38.9%, 62.5%, and 100%, respectively. The area under the curve was 0.857 (P < 0.001), with an overall sensitivity and specificity of 84% and 70% in the internal validation of the score. Conclusion: This EUS predictive score for invasive cancer in BD-IPMN has a high accuracy and could be an additional tool to consider in patient management.

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