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2019, Number 3

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Cir Cir 2019; 87 (3)

Ampulary tumors: presurgical staging by endoscopic ultrasonography. Diagnostic test study

Membrillo-Romero A, De la Fuente-Lira M, Carvallo-Guevara P, Rendón-Macías ME, Riojas-Garza A

Language: Spanish
References: 31
Page: 278-284
PDF size: 193.23 Kb.


ABSTRACT

Objective: To analyze the accuracy of endoscopic ultrasound (EUS) in the evaluation of ampullary tumors compared to histopathology (HP) staging. Methods: A retrospective diagnostic test study. Patients with ampullary tumors staged by EUS and postpancreatoduodenectomy HP attended during 2012-2018 at tertiary level hospital. Results: 14 patients with adenocarcinoma where included. Tumor size measured by EUS showed an adequate correlation (R = 0.65; p= 0.01) with HP. The accuracy in the evaluation of duodenal wall, pancreatic, and biliary duct invasion was 78.5, 78.5 and 57.1%, respectively. By HP, there were three T1 (21.4%), two T2 (14.2%) and nine T3 (64.2%). The accuracy of T and N staging by EUS was 71.4% (kappa = 0.50) and 50% (kappa = −0.04) respectively. There were more staging errors in patients with biliary stent. Conclusion: EUS was useful in estimating tumor size, duodenal wall and pancreatic invasion. Limitation was found in the evaluation of biliary duct invasion, as well as overestimation of T stage and underestimation of N stage. It is necessary an increased effort in ultrasonography training. We suggest EUS testing before biliary stenting.


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