Table 1.
Clinicopathological findings of patients (n = 41).
| Variables | Number of subjects (%) |
|---|---|
| Sex | |
| Male | 38 (92.7) |
| Female | 3 (7.3) |
| Endoscopic treatment | |
| Mucosal resection | 9 (22.0) |
| Submucosal dissection | 32 (78.0) |
| Surgical indication | |
| Submucosal tumor invasion | 37 (90.2) |
| Lymphatic or venous invasion | 27 (65.9) |
| Undifferentiated component† | 24 (58.5) |
| Horizontal margin involvement | 4 (9.8) |
| Vertical margin involvement | 14 (34.1) |
| Surgical approach | |
| Laparoscopy | 34 (82.9) |
| Hand assistance | 4 (9.8) |
| Open laparotomy | 3 (7.3) |
| Extent of gastrectomy | |
| Partial | 5 (12.2) |
| Proximal | 9 (22.0) |
| Distal | 20 (48.8) |
| Total | 7 (17.1) |
| Remnant of primary tumor (surgical specimen) | |
| No | 35 (85.4) |
| Yes | 6 (14.6) |
| Depth of tumor invasion‡ | |
| pT1a | 4 (9.8) |
| pT1b1 | 4 (9.8) |
| pT1b2 | 33 (80.5) |
| Lymph node metastasis (surgical specimen) | |
| pN0 | 37 (90.2) |
| pN1 | 4 (9.8) |
| TNM stage (surgical specimen) | |
| fStage IA | 37 (90.2) |
| fStage IB | 4 (9.8) |
†Differentiated: well-differentiated adenocarcinoma, moderately differentiated adenocarcinoma, or papillary adenocarcinoma; undifferentiated: poorly differentiated adenocarcinoma, signet-ring cell adenocarcinoma, or mucinous adenocarcinoma.
‡According to the third English edition of the Japanese Classification of Gastric Carcinoma.