Table 2: Accuracy of cancer invasion depth as determined by endoscopic ultrasound.

HistologyEUS
M/SM1SM2MP deeperTotalAccuracy

m/sm1260561132779.5% (260/327)
sm22043167954.4% (43/79)
PPV92.8% (260/280)43.4% (43/99)

EUS: endoscopic ultrasonography; PPV: positive predictive value; M/SM1, SM2, and MP deeper are classifications of the depth of tumor invasion into the submucosa (see text for full description).