Pyelectasis

（重定向自Pyelectasia）

Pyelectasis is a dilation of the renal pelvis. The term is derived from the prefix pyelo-, meaning "[renal] pelvis", and ectasis, meaning "dilation or distension". It is a relatively common ultrasound finding and is three times more common in male fetuses. In most cases pyelectasis resolves normally, having no ill effects on the baby. The significance of pyelectasis in fetuses is not clear. It was thought to be a marker for obstruction, but in most cases it resolves spontaneously. In some studies it has been shown to appear and disappear several times throughout the course of pregnancy. There is some discussion about what degree of pyelectasis is considered severe enough to warrant further investigation and most authorities use 6mm as the cut-off point.

单词	Pyelectasia
释义	Pyelectasia 英语百科 Pyelectasis （重定向自Pyelectasia） Pyelectasis is a dilation of the renal pelvis. The term is derived from the prefix pyelo-, meaning "[renal] pelvis", and ectasis, meaning "dilation or distension". It is a relatively common ultrasound finding and is three times more common in male fetuses. In most cases pyelectasis resolves normally, having no ill effects on the baby. The significance of pyelectasis in fetuses is not clear. It was thought to be a marker for obstruction, but in most cases it resolves spontaneously. In some studies it has been shown to appear and disappear several times throughout the course of pregnancy. There is some discussion about what degree of pyelectasis is considered severe enough to warrant further investigation and most authorities use 6mm as the cut-off point.
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