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ENDOSCOPIC ULTRASONOGRAPHY IN JAPAN and THE REST OF THE WORLD

Endoscopic ultrasonography (EUS), which was introduced for diagnosing the early stages of pancreatic carcinoma by intraluminal ultrasound scanning, has developed remarkably during the past 20 years. During this time the indication of EUS has been spreading not only to pancreatobiliary lesions but also to gastrointestinal lesions. In line with the spreading of EUS examinations, the instruments have also improved and new EUS systems have been developed. Endoscopic ultrasonography was developed and rapidly accepted in Japan which became the world EUS pioneer. However, each country has their own evaluation of EUS, as EUS is used to study varied characteristic diseases in each country.