Table 1: Clinicopathological findings of patients ( ).

VariablesNumber of subjects (%)

Sex
 Male38 (92.7)
 Female3 (7.3)
Endoscopic treatment
 Mucosal resection9 (22.0)
 Submucosal dissection32 (78.0)
Surgical indication
 Submucosal tumor invasion37 (90.2)
 Lymphatic or venous invasion27 (65.9)
 Undifferentiated component24 (58.5)
 Horizontal margin involvement4 (9.8)
 Vertical margin involvement14 (34.1)
Surgical approach
 Laparoscopy34 (82.9)
 Hand assistance4 (9.8)
 Open laparotomy3 (7.3)
Extent of gastrectomy
 Partial5 (12.2)
 Proximal9 (22.0)
 Distal20 (48.8)
 Total7 (17.1)
Remnant of primary tumor (surgical specimen)
 No35 (85.4)
 Yes6 (14.6)
Depth of tumor invasion
 pT1a4 (9.8)
 pT1b14 (9.8)
 pT1b233 (80.5)
Lymph node metastasis (surgical specimen)
 pN037 (90.2)
 pN14 (9.8)
TNM stage (surgical specimen)
 fStage IA37 (90.2)
 fStage IB4 (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.