Fig. 2

a, Comparison of the diagnosability of GBMTs with ss invasion by EUS imaging. An irregular LHEL showed the highest sensitivity and accuracy for diagnosing ss invasion among the four EUS imaging parameters. A thickened LHEL showed the highest specificity for diagnosing ss invasion among the four EUS imaging parameters. However, a thickened LHEL was less accurate than an irregular LHEL for diagnosing ss invasion. b, Diagnosability of GBMTs with ss invasion (limited only to the ss) on EUS. An irregular LHEL showed the highest sensitivity and accuracy for diagnosing ss invasion among the four EUS imaging parameters. GBMT, gallbladder malignant tumor, subserosa; EUS, endoscopic ultrasonography; LHEL, lateral hyperechoic layer. * p < 0.05, ** p < 0.01