Fig. 3

Observed-minus-expected (O-E) value between observed and expected frequencies of EUS features. A-D: O-E value of EUS features between I-SMTLs and non-I-SMTLs. A: shows the originating layer, B: shows echogenicity, C: shows echo heterogeneity, and D: shows boundary. Note: Green column: I-SMTLs group; Orange column: non-I-SMTLs group. E-G: O-E value of EUS features between groups with different pathological characteristics. E: shows Originating layer distribution in lesions with versus without smooth muscle hyperplasia; F: Echogenicity in lesions with versus without fibrous tissue alterations; G: Echo heterogeneity in lesions with versus without fibrous tissue alterations. Note: Green column: Presence of a specific pathological feature; Orange column: Absence of the feature. Positive values indicate observed > expected; negative values indicate observed < expected