Antenatal hydronephrosis is a condition where the kidneys of a fetus become swollen due to urine buildup. This condition is often detected during routine prenatal ultrasounds and can affect one or both kidneys.
Causes
Physiologic Dilation : The most common cause, often benign and resolves on its own
Ureteropelvic Junction (UPJ) Obstruction : A blockage where the kidney meets the ureter
Ureterovesical Junction (UVJ) Obstruction : A blockage where the ureter meets the bladder
Posterior Urethral Valves : A blockage in the male urethra, which is more severe
Renal Duplication Anomalies : Presence of two ureters from a single kidney, which can lead to obstruction
Multicystic Dysplastic Kidney : A non-functioning kidney due to complete obstruction
Symptoms
Prenatal : Detected via ultrasound, showing enlarged kidneys
Postnatal : May include urinary tract infections, abdominal pain, or palpable abdominal mass
Diagnosis
Prenatal Ultrasound : Detects kidney enlargement and assesses severity
Postnatal Imaging : Ultrasound, voiding cystourethrogram (VCUG), or MAG3 scan to evaluate kidney function and drainage
Treatment
Observation : Many cases resolve without intervention
Antibiotic Prophylaxis : To prevent urinary tract infections in some cases
Surgical Intervention : Required for severe obstructions or if kidney function is at risk
Prevention
Regular Prenatal Care : Early detection through routine ultrasounds
Follow-Up Imaging : Postnatal monitoring to ensure proper kidney function and drainage
When to Seek Medical Attention
If the child shows signs of urinary tract infection, such as fever, irritability, or poor feeding.
If there is persistent abdominal pain or a noticeable mass in the abdomen
Support and Care
Managing antenatal hydronephrosis involves regular monitoring and, in some cases, surgical intervention. It’s important to provide emotional support to parents and caregivers, reassuring them that many cases resolve without significant issues.