Patient's question:
On May 15, 2017, during the 21st week of pregnancy, a 4D ultrasound revealed that the fetus had bilateral renal separation. The left kidney was separated by about 7.9mm, and the right kidney by about 7mm. Half a month later, on June 1st, a follow-up ultrasound showed that both kidneys were separated by about 10mm. For the third time on June 14th, the ultrasound report stated that both renal pelvises were separated by about 11mm. Please ask the doctor what should be done in this situation?Doctor's answer:
The collecting system of a normal fetal kidney may have mild separation, with a separation diameter of up to 6 millimeters. However, hydronephrosis is diagnosed when the renal pelvis dilation is ≥10 millimeters or there is dilation of the renal calyces after the gestational age exceeds 30 weeks.Opinion and Suggestions: If hydronephrosis is found in the fetus, there is no need to be overly concerned. It is not necessary to terminate the pregnancy. A follow-up ultrasound should be performed one hour or one week after the initial discovery.