Table 1.
Characteristics of included studies
| Reference number | Year | Sample size | Modality | Image enhancement | Classification | EUS method | EUS frequencies, MHz | Confirmatory study |
|---|---|---|---|---|---|---|---|---|
| 25 | 1997 | 74 | Non-ME | Non | - | - | - | Esophagectomy/ER |
| 26 | 2010 | 236 | Non-ME | Non | - | - | - | Esophagectomy/ER |
| 27 | 2015 | 49 | Non-ME/ME | NBI | Arima and Inoue | - | - | Esophagectomy/ER |
| 28 | 1998 | 30 | ME | Non | Arima | - | - | Esophagectomy/ER |
| 29 | 2002 | 79 | ME | Non | Inoue | - | - | Esophagectomy/ER |
| 30 | 2006 | 12 | ME | Non | Inoue | - | - | ER |
| 31 | 2010 | 510 | ME | FICE | Arima | - | - | Esophagectomy/ER |
| 32 | 2014 | 220 | ME | NBI | JES | - | - | ER |
| 33 | 2014 | 249 | ME | NBI | JES | - | - | ER |
| 34 | 2014 | 464 | ME | NBI | JES | - | - | Esophagectomy/ER |
| 35 | 1995 | 40 | EUS | - | - | Radial and/or mini-probe | 7.5,12,20 | Esophagectomy/ER |
| 36 | 2006 | 40 | EUS | - | - | Mini-probe | 20 | Esophagectomy/ER |
| 37 | 2006 | 132 | EUS | - | - | Radial and/or mini-probe | 7.5,10,20 | Esophagectomy/ER |
| 38 | 2011 | 145 | EUS | - | - | Mini-probe | 20,30 | Esophagectomy/ER |
Non-ME non-magnified endoscopy; ME magnified endoscopy; EUS endoscopic ultrasound; IE Image enhancement method; FICE FUJI Intelligent Color Enhancement system; NBI Narrow band imaging system; Arima Arima’s classification; Inoue Inoue’s classification; JES Japan esophageal society classification; ER endoscopic resection