然而，多年的临床经验告诉我们，这种无回声的暗区，特别是局限性的暗区，常与邻近心脏其它脏器的疾病混淆。
However, experience has taught us that other types of sonolucent space adjacent to the heart can sometime be mistaken for pericardial effusions and loculated effusions in particular.
结论无回声边及肿瘤内无回声区提示RCC的诊断。
Conclusions an anechoic rim or intratumoral cysts suggests the diagnosis of RCC.
结果输入袢梗阻的超声诊断符合率为94% （ 15 /16） ，其声像图表现为中上腹横置长管状无回声暗区。
Results The diagnosis accurate rate of ultrasound was 94% (15/16). A transverse tube-like anechoic area was detected in the upper-middle abdomen on ultrasonogram.
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