| ID | Country | Sample size | Study population | EUS type | Frequency (MHz) | ECG staging | Reference test |
| Kim et al. [16] | Korea | 345 | Confirmed ECG | Miniprobe | 20 | M, SM1, SM2 | Surgery, ESD, or EMR | Cheng et al. [39] | China | 205 | Confirmed ECG | Radial | 7.5 or 20 | M, SM1, SM2 | Surgery or ESD | Kim et al. [28] | Korea | 273 | Confirmed ECG | Miniprobe | 20 | M, SM | Surgery or ESD | Lee et al. [24] | Korea | 393 | Confirmed ECG | Radial | 20 | M, SM | Surgery, ESD, or EMR | Watari et al. [42] | Japan | 132 | Confirmed ECG | Miniprobe | 20 | M, SM1, SM2 | Surgery, ESD, or EMR | Tsujii et al. [18] | Japan | 208 | Confirmed ECG | Miniprobe | 12, 20 | M, SM | Surgery or ESD | Mandai and Yasuda [34] | Japan | 406 | Confirmed ECG | Miniprobe or radial | 20 | M/SM1, SM2 | Surgery, ESD, or EMR | Okada et al. [7] | Japan | 542 | Confirmed ECG | Miniprobe | 20 | M, SM1, SM2 | Surgery or ESD | Choi et al. [23] | Korea | 388 | Confirmed ECG | Miniprobe | 12 | M, SM | Surgery or ESD | Kim et al. [12] | Korea | 176 | Suspected ECG | Miniprobe | 20 | M, SM | Surgery, ESD, or EMR | Mouri et al. [14] | Japan | 235 | Confirmed ECG | Miniprobe | 20 | M, SM | Surgery, ESD, or EMR | Kim et al. [9] | Korea | 206 | Suspected ECG | Miniprobe or radial | 5, 7.5, 12, 15, 20 | M, SM | Surgery or EMR | Akashi et al. [8] | Japan | 267 | Suspected EC | Miniprobe | 12, 15, 20 | M, SM | Surgery or EMR | Yoshida et al. [17] | Japan | 295 | Confirmed ECG | Miniprobe | 7.5, 12, 15, 20 | M, SM1, SM2 | Surgery | Hizawa et al. [29] | Japan | 234 | Confirmed ECG | Miniprobe or radial | 12, 20 | M, SM | Surgery, ESD, or EMR | Matsumoto et al. [19] | Japan | 78 | Confirmed ECG | Miniprobe | 20 | M, SM | Surgery, ESD, or EMR | Ichikawa et al. [43] | Japan | 142 | Confirmed ECG | Miniprobe | 12, 20, 30 | M, SM1, SM2 | Surgery or ESD |
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