对肠套叠描述错误的是 ["突发腹痛，大便带血 ","右下腹触及包块 ","肠壁增厚呈假肾征 ","长轴切面呈套筒征 ","短轴切面呈同心圆征"] 描述肠恶性淋巴瘤不正确的是 ["肠壁明显增厚或呈低回声肿块 ","肠管不同程度的狭窄 ","多属恶性淋巴瘤结外浸润 ","多属原发性淋巴结外淋巴瘤 ","尤以小肠常见 "] 胃平滑肌瘤与平滑肌肉瘤的主要不同点是 ["类圆形肿块 ","内部的无回声 ","局部隆起 ","分叶状不均质肿块，五层结构消失 ","多位于粘膜下层 "] 胃溃疡的主要超声诊断依据是 ["粘膜不连续 ","胃壁局限性增厚及凹陷 ","粘膜回声层次不清 ","局部蠕动减弱 ","粘膜纠集征"] 一新生儿，进行性加重呕吐4周，超声示幽门部环周均匀性增厚，厚度>0.4C.m，胃内容物通过受阻可能是 ["十二指肠闭锁 ","环形胰腺 ","先天性肥厚性幽门狭窄 ","幽门痉挛 ","肿块压迫"] 胃壁广泛增厚，呈假肾征时，应是胃癌