[问答题,简答题] 哪些检查有助胃癌的诊断?

直肠癌转移到肝是()胃癌转移到卵巢是() ["A．血行转移","B．直接蔓延","C．淋巴转移","D．种植转移","E．胃肠道管腔内转移"] 癌灶直径≤1cm()局限于粘膜或粘膜下层的胃癌() ["A．早期胃癌","B．小胃癌","C．微小胃癌","D．进展期胃癌","E．晚期胃癌"] 如何鉴别良性溃疡与恶性溃疡? 异型增生 肠化生 哪些检查有助胃癌的诊断?