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| Group | PPD | MPD | P value | |||
|---|---|---|---|---|---|---|
| LNM (%) | 95% CI | LNM (%) | 95% CI | |||
| Ex | 0/37 (0.0) | 0–9.41% | 1/21 (4.76) | 0.85–22.67% | 0.373 | |
LNM, lymph node metastasis; PPD, pure poorly differentiated adenocarcinoma; MPD, mixed predominantly poorly differentiated adenocarcinoma; ESD, endoscopic submucosal dissection; EGC, early gastric cancer; CI, confidence interval; Ex, expanded indications for ESD of undifferentiated EGC.
