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Living with Microcephaly-cervical spine fusion anomalies syndrome

A rare inherited syndrome with a small head, short stature, mild learning challenges, and fused neck bones.

Understanding Microcephaly-cervical spine fusion anomalies syndrome

Microcephaly-cervical spine fusion anomalies syndrome is a rare inherited syndrome with a small head and fused bones in the neck.

People with this syndrome have a small head (microcephaly), mild intellectual disability, short stature, and certain facial features. Bones in the neck are fused, which can press on the spinal cord. GARD says it has been described in two brothers whose parents were related. Signs may appear during pregnancy or in the newborn period.

Signs & symptoms

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

  • Smaller-than-average head size (microcephaly)
  • Fused bones in the neck
  • Mild intellectual disability
  • Small lower jaw (micrognathia)
  • Hunched back (kyphosis)
  • Increased reflexes (hyperreflexia)

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 brain and nervous system specialists and genetic specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
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
How is pressure on the spinal cord checked and monitored?
Which specialists should we see for the neck and spine?
Is genetic testing available, and would it help other family members?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Recessive

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

GeneticNeurological

Also known as: microcephalus co-occurrent with cervical spine fusion anomaly; microcephaly with cervical spine fusion anomalies; microcephaly with cervical spine fusion anomaly

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Microcephaly-cervical spine fusion anomalies syndromeGARD ID 3610 · 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-cervical spine fusion anomalies syndrome.

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