7015 The role of endoscopic ultrasonography for the pancreatobiliary diseases in medical checkup.

Abstract

Introduction: EUS is considered to be useful modality for the pancreatobiliary(PB) disorders.We evaluated the efficiency of EUS for PB disorders. Subjects and Methods: Subjects consisted of 874 cases suspicious of PB disorders by US-performed for 82436 persons( 4/1994 - 12/1998 at Aichi Health Care Center.). Check up criteria of US were in table 1. We made EUS exam. for above listed 874 cases, and evaluated following points ; 1.True negative rate. 2. Coincidence rate between EUS diagnosis and definite diagnosis(Table-2). 3.Unchanged period from the point diagosed as benign. Every 6 month observasion by US was done, if there was any change on US, the case was re-examined by EUS, and once a year, individual prognosis inquiry was made by mail. Results: 1. 100%. Also, the cases followed by only US remained under US criteria. 2. 96.7%, 2 cases of pancreas divisum was misdiagnosed. 3.All the cases diagosed as benign remained unchanged. Conclusion: Using EUS , we could restrict to only 0.07%(60/82436) necessary to be sent to special hospital. EUS is an efficient and accurate examination of PB diseases in mass screening.