Table 1.
Patient and tumor characteristics
| Characteristics | No. of patients (%) |
|---|---|
| Age (years) | |
| Range | 53–85 |
| Median | 67 |
| Sex | |
| Male | 34 (92) |
| Female | 3 (8) |
| Performance status score | |
| 0–1 | 34 (92) |
| 2–3 | 3 (8) |
| History of double cancer | |
| Yes | 16 (43) |
| No | 21 (57) |
| History of heart disease | |
| Yes | 9 (24) |
| No | 28 (76) |
| Histology | |
| Squamous cell carcinoma | 37 (100) |
| Tumor location | |
| Cervical | 1 (3) |
| Upper thoracic | 5 (13) |
| Middle thoracic | 23 (62) |
| Lower thoracic or Esophagogastric junction | 8 (22) |
| Tumor length (cm) | |
| Range | 0.8–10 |
| Median | 3 |
| Circumference | |
| < 3/4 | 25 (67) |
| ≥ 3/4 | 4 (11) |
| Entire | 4 (11) |
| Unknown | 4 (11) |
| Methods of endoscopic resection | |
| EMR | 22 (59) |
| ESD | 15 (41) |
| Depth of pathological invasion | |
| Muscularis mucosae | 14 (38) |
| Submucosal layer | 22 (59) |
| Muscularis propria | 1 (3) |
| Resection margin | |
| Negative | 10 (27) |
| Positive | 17 (46) |
| Non-assessable | 6 (16) |
| Unknown | 4 (11) |
EMR endoscopic mucosal resection, ESD endoscopic submucosal dissection