Patient's question:
Pregnancy 36+; ultrasound report shows no separation of bilateral fetal renal pelvis. Pregnancy 36+; ultrasound report shows no separation of bilateral fetal renal pelvis. Two umbilical arteries present. No U.W pressure marks observed on the back skin. What is the meaning of this U.W pressure mark?Doctor's answer:
Bilateral renal pelvis separation (or bilateral renal collecting system separation) is a manifestation of hydronephrosis in the fetal kidney, and the amount of fluid accumulation is generally not more than 1 centimeter, which is considered physiological hydronephrosis. On ultrasound, it appears as an elliptical echo area located in the center of the kidney. Fetal bilateral renal separation indicates hydronephrosis, and some children may have this condition. It is recommended to undergo regular follow-up ultrasound of the urinary system after birth. In some cases, the amount of fluid accumulation may gradually decrease after birth. If there is a progressive increase, it is necessary to consult a urologist for surgical treatment.