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Medically reviewed by Last updated on Apr 2, 2024.

What do I need to know about macrocephaly?

Macrocephaly means your child's head is larger than expected for his or her age and gender. Healthcare providers will measure around your child's head. They will compare the size of your child's head to other children that are the same age and sex.

What causes macrocephaly?

There may be a family history of larger heads. Macroencephaly may instead be a symptom of another condition. Some examples include:

What are the symptoms of macrocephaly?

Symptoms may appear right away. Or, they may appear as your child develops. Symptoms depend on the cause of macrocephaly and may include:

How is macrocephaly diagnosed and treated?

Healthcare providers can usually diagnose your child during an exam. Your child may need imaging or blood tests to find out the cause. He or she may also need to see a specialist. Treatment depends on the cause of your child's macrocephaly.

When should I call my child's doctor or specialist?

Care Agreement

You have the right to help plan your child's care. Learn about your child's health condition and how it may be treated. Discuss treatment options with your child's healthcare providers to decide what care you want for your child. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.