Pelviectasis (also called pelvocaliectasis) merely means a separation of the collecting system or pelvis of the kidney detected by the ultrasound device. It does not suggest any disease, unless there are symptoms or signs of blockage and none are described. I am unable to interpret the kidney ultrasound without performing a complete history and physical examination on your son. I suggest that you ask the nephrologist when you meet with him or her in the future.
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