What Is Hydronephrosis? Diagnosis & Treatment

Written by Medicover Team and Medically Reviewed by Dr Chodisetti Subba Rao , Urologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Hydronephrosis is a condition in which one or both kidneys become swollen due to the buildup of urine caused by a blockage or obstruction in the urinary tract. It can occur at any age and may affect one or both kidneys. Common causes include kidney stones, enlarged prostate, urinary tract abnormalities, or tumors that prevent normal urine flow.

Symptoms may include flank pain, painful urination, frequent urination, nausea, fever, or blood in the urine, although some people may have no symptoms. If left untreated, hydronephrosis can lead to kidney damage or loss of kidney function. Early diagnosis and appropriate treatment can relieve the obstruction, protect kidney health, and prevent serious complications.

What are the Different Types of Hydronephrosis?

Hydronephrosis can be classified based on severity and cause:

Unilateral Hydronephrosis: Swelling affects one kidney.
Bilateral Hydronephrosis: Both kidneys are involved.
Prenatal Hydronephrosis: Detected before birth via routine ultrasound.
Postnatal Hydronephrosis: Diagnosed after birth with symptoms or imaging.

Severity levels (mild, moderate, or severe) are based on the degree of expansion of the kidney and blockage of urine flow.

What are the Hydronephrosis Symptoms and Warning Signs?

Hydronephrosis symptoms vary depending on age and severity. While some infants show no signs, others may experience visible swelling or discomfort.

In older children, pain and urinary symptoms are more prominent. Early recognition can help prevent complications.

Common Symptoms:

Swelling in the belly or flank (especially in babies)
Blood in the urine can also be a symptom of hydronephrosis.
Difficulty passing urine (may indicate infection)

Severe Symptoms:

Flank or abdominal pain (especially in older children)
Fever (suggestive of urinary tract infection)
Recurring urinary infections

When to consult a doctor:

If your child has unexplained belly swelling, painful urination, blood in the urine, or repeated UTIs, seek pediatric urological evaluation promptly.

What are the Common Causes of Hydronephrosis?

Hydronephrosis can stem from various underlying issues that block urine flow or increase urinary pressure. Identifying the cause is key for treatment.

Causes of Hydronephrosis

Urinary tract obstruction
Kidney stones
Congenital abnormalities
Tumors
Urinary tract infections
Inflammation
Pregnancy-related factors
Scar tissue from previous surgeries

When to See a Doctor for Hydronephrosis?

Timely consultation is crucial when symptoms persist or worsen.

Consult a doctor if

Belly or flank swelling is observed
Urinary difficulties continue beyond a few days
There are signs of a urinary tract infection or fever
You notice blood in your child's urine

Children with a known history of kidney issues or congenital abnormalities should be closely monitored.

Find Urologists for Hydronephrosis Treatment Near You

How is Hydronephrosis Diagnosed?

Hydronephrosis diagnosis begins with imaging and is followed by functional studies to assess severity and underlying causes. At Medicover, we use advanced pediatric imaging and diagnostics.

Common Diagnostic Tests

Prenatal Ultrasound: Often the first clue before birth
Postnatal Ultrasound: Confirms kidney swelling after delivery
Radionuclide Renal Scan: Evaluates kidney function and urine drainage
Micturating Cystourethrogram (MCUG): Checks for urine reflux from the bladder back into the kidney
Serial Imaging: Monitors the progression of kidney dilation

At Medicover Hospitals, our pediatric specialists provide precise diagnoses and continuous monitoring to ensure the best possible outcomes.

What are the Treatment Options for Hydronephrosis?

Treatment depends on the severity of the condition and whether the kidney function is compromised. At Medicover, we tailor treatment to each child's needs.

Non-Surgical Management

Observation for mild/moderate cases
Antibiotics to prevent infections
Regular ultrasounds and renal scans

Surgical Options

Pyeloplasty: Removal of the obstructed segment and reconnection of the ureter to the kidney
Laparoscopic: open, or robotic techniques are available
Robotic surgery: offers faster recovery and minimal scarring
DJ Stent Placement: Temporary support for urine drainage post-surgery
Stent Removal: Done via cystoscopy after 6-8 weeks

At Medicover, surgeries are performed by skilled pediatric urologists, ensuring precision and safety.

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What is the Recovery Process After Hydronephrosis Treatment?

Post-treatment care involves follow-ups and preventive strategies to safeguard kidney health.

Recovery Overview

Prophylactic antibiotics for up to 6 weeks post-surgery
Follow-up ultrasounds at 3 and 6 months
Temporary persistence of hydronephrosis is expected
Nutritional support and growth monitoring
DJ stent removal after healing is complete

Medicover provides complete post-op support, including nutritional guidance, pediatric nephrology follow-ups, and access to 24/7 care.

What Precautions Can Help Prevent Hydronephrosis?

While some causes are congenital, others can be managed or avoided with preventive care.

Prevention of Hydronephrosis

Prenatal ultrasound monitoring
Timely treatment of urinary tract infections
Avoiding dehydration
Follow-up care for children with urinary abnormalities

Complications if untreated

Kidney function loss
Permanent kidney damage
Need for nephrectomy (kidney removal)
Recurrent infections
Need for repeat surgical intervention

What are the Risk Factors of Hydronephrosis?

Family history of kidney abnormalities
Prior abdominal or pelvic surgeries
Recurrent urinary infections
Structural abnormalities in the urinary tract

Frequently Asked Questions

1. Can hydronephrosis go away on its own in babies?

Yes, in many cases mild hydronephrosis resolves naturally as the child grows. Regular monitoring through ultrasound helps ensure it's improving without intervention.