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Table 2 Clinical characteristics of the included studies

From: Efficacy and safety of endoscopic submucosal tunnel dissection for superficial esophageal neoplastic lesions: a systematic review and meta-analysis

AuthorsLesions, nLocation of the lesionParis classificationMean size (mm)Operation time (min)Mean follow-up (mo)
HtHt + MtMtMt + LtLtIIIaIIbIIcIIa + IIbIIa + IIcIIb + IIcIII
Wang et al. [17]31124020008718111943505003Circumferential extent, n (1)102.420.2
Zhang et al. [18]4631166200191823400Circumferential extent, n (2)74.5NA
Zhang et al. [12]525020027NACircumferential extent, n (3)93.2NA
Huang et al. [19]383022013NA39.0 (M)38.0 (M)NA
Gan et al. [20]7003400010501061.4121.17.3
Ye et al. [21]2300100130896000065.0 (M)145.0 (M)16 (M)
Pioche et al. [22]11005060170300049.076.7NA
Linghu et al. [23]5003200030200057.077.07.4
Arantes et al. [24]25NANA25.085.021.4
  1. Ht higher thoracic, Mt middle thoracic, Lt lower thoracic, M Median
  2. Circumferential extent, n (1): ≤ 1/4 (3.5%); ≤ 1/2 (52.4%); ≤ 3/4 (20.9%); ≤ 7/8 (13.2%); ≤1 (10.0%)
  3. Circumferential extent, n (2): ≥ 1/3, < 1/2 7 (15.2%); ≥ 1/2, < 3/4 17 (37.0%); ≥ 3/4, < 4/4 4 (8.7%); 4 /4 18 (39.1%)
  4. Circumferential extent, n (3): ≥ 1/3, < 3/4 29 (55.77%); ≥ 3/4 23 (44.23%)