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Living with Microcephaly-cardiac defect-lung malsegmentation syndrome

A very rare syndrome with a small head, heart and kidney differences, lung shape differences, and cleft palate.

Understanding Microcephaly-cardiac defect-lung malsegmentation syndrome

Microcephaly-cardiac defect-lung malsegmentation syndrome is a very rare syndrome that combines a small head, heart defects, and lung and kidney differences.

GARD describes this syndrome as a combination of a small head (microcephaly), heart defects, small or missing kidneys, differences in how the lungs are divided into lobes, and cleft palate. It is seen in the newborn period or infancy. Other features can include a small lower jaw, low muscle tone, and thinking and learning difficulties.

Signs & symptoms

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

  • Smaller-than-average head size (microcephaly)
  • Hole between the lower heart chambers (ventricular septal defect)
  • Cleft palate
  • Absent or small kidney
  • Differences in how the lungs are divided into lobes
  • Low muscle tone (hypotonia)

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 heart and blood vessel 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); Heart and blood vessel specialists (cardiologists)
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 rare disease patient organizations for support
  • 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
Which specialists should follow the heart, kidneys, and lungs?
What care is available for cleft palate and feeding?
Is genetic testing available for this syndrome?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive

Changes in genes (also called variants) cause this syndrome, and it is inherited in an autosomal recessive way. This means a child inherits a changed copy of the gene from each parent.

Genetic

Also known as: ellis yale winter syndrome; ellis-yale-winter syndrome; microcephaly, congenital heart disease, lung segmentation defects and unilateral renal agenesis; microcephaly, congenital heart disease, unilateral renal agenesis, and hyposegmented lungs

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Microcephaly-cardiac defect-lung malsegmentation syndromeGARD ID 2098 · 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 Microcephaly-cardiac defect-lung malsegmentation syndrome.

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