4幽门螺杆菌的检测: detection of H. pyior: 5便隐血试验: Occult blood in stool (二)鉴别诊断: Differential diagnosis 1癌性溃疡: cancerous ulcer4.幽门螺杆菌的检测：detection of H.pyior: 5.便隐血试验：Occult blood in stool (二)鉴别诊断：Differential diagnosis 1.癌性溃疡：cancerous ulcer