New Delhi: A child born with one kidney, a condition known as unilateral renal agenesis (URA), can grow up strong, active and healthy, as long as they are monitored regularly and guided well at home and in school, health experts said, assuring the parents of such kids to not to panic.
A 2023 meta-analysis covering more than 15.6 million individuals found renal agenesis occurs in 0.03% of births, with unilateral cases accounting for the majority. In many children, the healthy kidney grows bigger on its own–a process called compensatory hypertrophy — allowing it to perform the work of two kidneys effectively.
Studies show that the long-term outlook for children with a solitary functioning kidney is overwhelmingly positive. A comprehensive systematic review analyzing 2,684 patients found that while some may develop proteinuria or elevated blood pressure, the vast majority maintain normal kidney function into adulthood
“Parents often feel anxious when they learn their child has one kidney, but most of these children grow up without complications,” said Dr. Shandip Kumar Sinha, Director of Pediatric Surgery and Pediatric Urology at Medanta–The Medicity, Gurugram. “With routine monitoring and simple lifestyle precautions, they can enjoy a completely normal childhood.”
Research backs this reassurance. A study involving 171 children with URA tracked their health over time. Of these children, 2.3% were found to have protein in their urine, which can be an early sign that the kidney is under stress. Around 10.5% developed high blood pressure, including cases that were not immediately visible without proper testing. Only 2.9% showed early signs of chronic kidney disease, suggesting that most children continue to remain healthy with regular monitoring.
But long-term tracking also shows that around 94% of children stay healthy without major kidney problems into their teens.
“These numbers reinforce that early awareness and regular check-ups make all the difference,” said Dr. Amit Agarwal, Pediatric Nephrologist at Rainbow Children’s Hospital. “A child with one kidney is not defined by limitations, but by resilience and the confidence we help them build.”
Experts say children with one kidney do not need strict food restrictions and can play most sports, including running, swimming and cycling. Contact sports may need a doctor’s advice or protective gear.
“Psychological and emotional support is equally important,” said Dr. Ankit Prasad, Senior Consultant and Unit Head, Fortis Hospital, Noida. “Counseling and educating peers can reduce stigma and prevent unnecessary bullying. Hydration, adequate sleep, low-sodium diets, routine physical activity, and regular blood pressure checks are essential.”
Dr. Ashish Gupta, Senior Consultant Pediatrician at Apollo Hospital, added:
“Unilateral kidney agenesis often goes unnoticed for years and is discovered incidentally. Parents should not panic — routine urine protein checks, BP monitoring, and occasional ultrasound are usually all that’s needed. What we must avoid are dangerous contact sports, excess salt, and kidney-toxic medications.”
Due to advancements in prenatal imaging, many cases of URA are now detected before birth, enabling timely planning and counseling. Pediatric societies such as the Indian Society of Pediatric Nephrology (ISPN) are calling for broader awareness campaigns so families understand the importance of long-term monitoring.
Global health organizations also stress that solitary kidneys typically function normally and support a high quality of life — provided blood pressure and proteinuria are monitored over time.
“Parents need reassurance, not fear,” said Dr. Sinha. “With regular care — especially annual BP checks and urine tests — these children can absolutely lead normal, healthy, and fulfilling lives.”
A 2023 meta-analysis covering more than 15.6 million individuals found renal agenesis occurs in 0.03% of births, with unilateral cases accounting for the majority. In many children, the functioning kidney naturally enlarges — a process called compensatory hypertrophy — allowing it to perform the work of two kidneys effectively.
Studies show that the long-term outlook for children with a solitary functioning kidney is overwhelmingly positive. A comprehensive systematic review analyzing 2,684 patients found that while some may develop proteinuria or elevated blood pressure, the vast majority maintain normal kidney function into adulthood
