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Living with Multicystic kidney dysplasia

A condition present from birth in which one or both kidneys are large, filled with cysts, and do not work.

Understanding Multicystic kidney dysplasia

Multicystic kidney dysplasia is a rare kidney and urinary tract difference present from birth in which a kidney is swollen with many cysts and does not function.

It can affect one kidney (unilateral) or both (bilateral). When only one kidney is affected, there are usually no symptoms as long as the other kidney works fully. Sometimes the cysts grow large enough to cause belly symptoms. Bilateral disease is more serious and can cause low amniotic fluid, underdeveloped lungs, and severe kidney failure in newborns. Signs are seen in the newborn period or infancy.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Large kidney filled with cysts
  • A mass in the belly
  • Belly swelling
  • Breathing difficulty in newborns
  • Early (premature) birth

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and kidney specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Genetic specialists (geneticists); Kidney specialists (nephrologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with National Kidney Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Is only one kidney affected, and how well does the other kidney work?
How often should kidney function and blood pressure be checked?
Which specialists, such as a kidney doctor, should follow my child?

Quick facts

Symptoms usually startNewborn and as an Infant

Changes in genes (also called variants) cause this condition. GARD does not list the specific gene.

GeneticKidney

Also known as: mcdk; mckd - multicystic kidney disease; multicystic dysplastic kidney; multicystic kidneys; multicystic renal dysplasia

Patient organizations

Source: NIH GARD · Multicystic kidney dysplasiaGARD ID 18748 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Multicystic kidney dysplasia.

Explore the Multicystic kidney dysplasia blog

Explore research for Multicystic kidney dysplasia

Explore actively recruiting Multicystic kidney dysplasia studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Multicystic kidney dysplasia with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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