题目内容
对门静脉海绵样变性的表述，以下说法正 确的是
2022-01-25
A.分为原发性和继发性两大类
B.门静脉分支扩张
C.肝门区见网状扭曲血管
D.频谱呈门脉样连续状低速血流
E.以上均是
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