Fetal Renal Anomalies in Pregnancy in Nagpur
Detailed fetal kidney, bladder, ureter and amniotic fluid evaluation for suspected pyelectasis, hydronephrosis, multicystic kidney, renal agenesis, posterior urethral valves and other urinary tract concerns — interpreted by Dr. Kunda Shahane at Mayflower Fetal Medicine.
```Dr. Kunda Shahane
MBBS, MS (Obs & Gynae), FIFM, FMF (London)
Dr. Kunda Shahane is Central India’s first dedicated fetal medicine specialist, with nearly two decades of fetal medicine experience and 20,000+ fetuses evaluated. At Mayflower Fetal Medicine & High-Risk Pregnancy Centre, renal and urinary tract findings are assessed in a structured, counselling-focused manner.
What are fetal renal anomalies?
“Renal anomaly” is a broad term. It may mean a mild pelvic dilatation that needs follow-up, or a more complex kidney, bladder or urinary tract condition that needs specialist counselling.
Sometimes mild and monitorable
Some findings, such as mild renal pelvic dilatation, are monitored by serial scans. The key is to check whether the measurement improves, remains stable or increases, and whether the rest of the urinary tract appears normal.
Sometimes part of a bigger picture
When both kidneys are affected, amniotic fluid is low, the bladder is abnormal, or other structural findings are present, the pregnancy may need genetic counselling, fetal medicine follow-up and paediatric planning before birth.
Quick facts for parents
Renal and urinary tract conditions assessed on fetal ultrasound
The same word “kidney swelling” can have different meanings. A structured fetal medicine scan helps separate low-risk, follow-up findings from conditions needing closer planning.
| Finding | What it may mean | What Dr. Kunda evaluates | Usual planning direction |
|---|---|---|---|
| Pyelectasis / renal pelvic dilatation | Dilatation of the collecting area of the kidney; may be mild, moderate or severe. | Measurement of renal pelvis, one-sided vs both-sided, ureter visibility, bladder and amniotic fluid. | Often follow-upSerial scan if persistent |
| Hydronephrosis | More significant dilatation of the kidney drainage system, sometimes from obstruction or reflux. | Severity, progression, kidney tissue thickness, ureter, bladder and fluid level. | Pregnancy follow-upPostnatal urology plan |
| Multicystic dysplastic kidney | One kidney may be replaced by multiple cysts and may not function normally. | Whether one or both kidneys are affected, opposite kidney health, amniotic fluid and other anomalies. | Paediatric planningHigh concern if bilateral |
| Renal agenesis | One or both kidneys may be absent or not visualised in expected location. | Kidney location, adrenal appearance, bladder filling, amniotic fluid and associated findings. | Detailed counsellingHigh concern if bilateral |
| Echogenic or cystic kidneys | Kidneys appear brighter or cystic, sometimes linked to inherited kidney conditions. | Kidney size, brightness, cyst pattern, family history, amniotic fluid and genetic testing need. | Genetic counsellingSerial assessment |
| Posterior urethral valves / lower urinary tract obstruction | Bladder outlet obstruction may affect bladder, kidneys and amniotic fluid. | Bladder size, keyhole sign, kidney changes, liquor level and fetal wellbeing. | Specialist planningShunt evaluation in selected cases |
| Oligohydramnios linked to renal cause | Low amniotic fluid may occur when fetal urine production or drainage is affected. | Fluid pockets, kidney appearance, bladder filling, membranes and fetal growth. | Close surveillanceCounselling and planning |
What is checked in a fetal renal anomaly scan?
Both kidneys
Presence, position, size, symmetry, echogenicity, cysts, renal tissue thickness and whether one or both kidneys are affected.
Drainage system
Renal pelvis measurement, ureter visibility, progressive dilatation and signs that suggest obstruction or reflux.
Bladder pattern
Bladder filling and emptying, bladder wall appearance, bladder size and signs of lower urinary tract obstruction.
Amniotic fluid
Fluid volume is important because after mid-pregnancy, fetal urine contributes significantly to amniotic fluid.
Associated anomalies
Brain, spine, heart, limbs, abdomen and placenta are reviewed because renal anomalies may sometimes occur with other findings.
Growth and wellbeing
Fetal growth, Doppler when needed and overall pregnancy risk are reviewed before deciding follow-up intervals.
What happens after a renal finding is seen?
The aim is not to create fear. The aim is to name the finding correctly, understand its severity, and build a clear pregnancy and newborn plan.
Confirm the exact finding
A targeted fetal medicine ultrasound checks both kidneys, bladder, ureters, amniotic fluid and the rest of fetal anatomy.
Classify severity and pattern
The finding is assessed as unilateral or bilateral, mild or severe, isolated or associated with other concerns, stable or progressive.
Discuss genetic testing when indicated
If renal findings are associated with other markers or anomalies, genetic counselling and diagnostic testing may be discussed.
Plan serial monitoring
Follow-up scans may assess growth, kidney appearance, renal pelvis measurement, bladder pattern and amniotic fluid over time.
Coordinate paediatric care
Some babies need postnatal ultrasound, paediatric nephrology or paediatric urology review after delivery. This planning can begin before birth.
Consider fetal therapy only in selected cases
In severe bladder outlet obstruction or selected high-risk situations, fetal intervention such as vesico-amniotic shunt may be discussed after detailed counselling.
GE Voluson Signature Expert for detailed fetal renal assessment
Mayflower Clinic uses the GE Voluson Signature Expert — an AI-enabled fetal ultrasound system that supports high-resolution imaging, colour Doppler and systematic fetal anatomy assessment. In renal anomaly evaluation, image quality and structured interpretation matter because small details change counselling.
```Who should consider this specialist scan?
Kidney swelling on anomaly scan
If your report mentions pyelectasis, hydronephrosis or renal pelvic dilatation.
Low amniotic fluid
If oligohydramnios is suspected and fetal kidney or urinary tract cause needs evaluation.
Bladder concern
If the bladder appears enlarged, thick-walled, not filling, not emptying or associated with urinary tract dilatation.
Cystic or bright kidneys
If kidneys appear cystic, enlarged, small, echogenic or structurally abnormal.
Family history
If there is family history of kidney disease, inherited renal disorder or previous affected pregnancy.
Second opinion
If parents need a calm, specialist explanation after an outside scan report mentions renal anomaly.
A fetal kidney finding should never be explained with one alarming sentence. Parents deserve a complete answer — what exactly is seen, how severe it is, whether it is isolated, what follow-up is needed, and what can be planned before birth.— Dr. Kunda Shahane, Fetal Medicine Specialist, Mayflower Fetal Medicine & High-Risk Pregnancy Centre
Common questions about fetal renal anomalies
Is fetal renal pelvic dilatation the same as hydronephrosis?
Both refer to dilatation in the kidney drainage area, but the degree and meaning may differ. Mild renal pelvic dilatation may simply need follow-up, while more significant hydronephrosis may need closer fetal medicine and postnatal planning.
Can a fetal kidney finding improve before birth?
Some mild urinary tract dilatations improve or remain stable during pregnancy. Others progress. That is why follow-up scans are important — not all findings behave the same way.
Why does Dr. Kunda check amniotic fluid in kidney problems?
After mid-pregnancy, fetal urine contributes to amniotic fluid. Low fluid can suggest that kidney function or urinary drainage may be significantly affected, especially when both kidneys or the lower urinary tract are involved.
Do all babies with antenatal kidney swelling need surgery?
No. Many babies need only ultrasound follow-up after birth. Some need paediatric urology or nephrology review, and only selected cases need procedures. The prenatal scan helps decide the correct level of preparedness.
When is amniocentesis advised for renal anomalies?
Amniocentesis may be discussed when the renal finding is not isolated, when there are additional structural anomalies, soft markers, abnormal screening results or a family history suggesting a genetic condition. The decision is individualised after counselling.
What is posterior urethral valve or bladder outlet obstruction?
It is a condition where urine flow from the fetal bladder may be blocked. It can cause a large bladder, urinary tract dilatation, kidney changes and low amniotic fluid. Severe cases require specialist fetal medicine counselling and paediatric urology planning.
Is ultrasound safe for fetal kidney assessment?
Diagnostic obstetric ultrasound is a standard, non-invasive imaging method when performed for medical indications by trained professionals. At Mayflower, all scans are done only for lawful medical diagnosis and pregnancy management.
Helpful next pages for this condition
Need a specialist opinion for a fetal kidney finding?
Bring your previous scan report, images, screening results and obstetric file. Dr. Kunda Shahane will review the finding and guide the next step clearly and compassionately.
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