Table 1.
The Curability Criteria for ER of EGCs in the Japanese Guidelines (4th Version)28,*
| Ulceration | Differentiated-type | Undifferentiated-type | |||
|---|---|---|---|---|---|
| pT1a | Negative | ≤2 cm† | >2 cm† | ≤2 cm† | >2 cm |
| Positive | ≤3 cm† | >3 cm | |||
| pT1b(SM1) | ≤3 cm† | >3 cm | |||
| pT1b(SM2) | |||||
ER, endoscopic resection; EGCs, early gastric cancers; pT1b(SM1), a submucosal invasion depth of <500 μm; pT1b(SM2), tumor invasion into the submucosa ≥500 μm from the muscularis mucosa.
*
White, gray, and black areas correspond to curative resection†, expanded curative resection†, and noncurative resection, respectively; †Piecemeal resection or positive horizontal margin is regarded as noncurative resection.