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Stage II includes: IIA (T2, N0, M0, G3); IIB (T3, N0, M0, Any G); (T1-2, N1, M0, Any G). T2: Tumor invades muscularis propria. T3: Tumor invades adventitia. T1: Tumor invades lamina propria, muscularis mucosae, or submucosa. N0: No regional lymph node metastasis. N1: Metastasis in 1-2 regional lymph nodes. M0: No distant metastasis. G3: Poorly differentiated. (AJCC 7th ed.)
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