Rett syndrome is a rare and serious neurological disorder that affects brain development, mostly in girls. It belongs to the autism spectrum and is usually discovered within the first two years of a child’s life. While there is no cure, early identification and the right support can make a meaningful difference for affected children and their families. This article explains what Rett syndrome is, how it is diagnosed, and what treatment options are available to Canadian families.
What Is Rett Syndrome?
Rett syndrome affects how the brain controls movement, communication, breathing, and emotion. It is considered a pervasive developmental disorder and falls within the broader autism spectrum. However, it has distinct features that set it apart from other autism spectrum conditions.
The disorder is found almost exclusively in girls. Boys who carry the same gene mutation typically do not survive long after birth. This is because boys have only one X chromosome, while girls have two, which offers some protection.
According to Mayo Clinic’s overview of Rett syndrome, the condition affects roughly 1 in every 10,000 to 15,000 female births worldwide. It is considered a rare disorder, but its impact on families is profound.
Symptoms of Rett Syndrome
Rett syndrome symptoms tend to appear gradually. Many girls with this condition develop normally in the first six to eighteen months of life. After that, noticeable changes begin to occur.
Early Signs to Watch For
One of the first signs is a slowing of head growth. This means the head circumference does not grow at the expected rate for the child’s age. Loss of muscle tone is another early warning sign. As a result, the child may seem floppy or have difficulty holding positions.
Children may also lose control of their voluntary hand movements. Instead, they begin making repetitive, purposeless hand movements. These include wringing, rubbing, squeezing, or washing their hands in an automatic way.
Behavioural and Physical Changes
Between the ages of one and four, children with Rett syndrome often lose social and language skills they had already developed. They may withdraw from social interaction and show extreme social anxiety. This regression can look very similar to autism, which is why misdiagnosis is common.
Walking becomes difficult for many children. Their gait may appear stiff or jerky, and their legs may feel rigid. Furthermore, breathing problems can develop, including irregular breathing patterns that occur even while the child is awake.
Seizures are also common in children with Rett syndrome. Other physical symptoms may include scoliosis (curvature of the spine), cold hands and feet, poor sleep patterns, and a reduced response to pain. Some children also experience teeth grinding, known as bruxism.
What Causes Rett Syndrome?
Rett syndrome is caused by a mutation in a gene called MECP2, found on the X chromosome. This gene plays an important role in brain development. When it mutates, it interferes with how the brain functions and how other genes are regulated.
In most cases, this mutation is not inherited from a parent. It occurs randomly, which means it cannot be predicted or prevented. Therefore, parents of a child with Rett syndrome did nothing to cause it.
Scientists believe the MECP2 gene influences many other genes involved in brain function. However, researchers are still working to fully understand exactly how this one mutation leads to all the wide-ranging effects seen in Rett syndrome. You can learn more about genetic causes through Healthline’s guide to Rett syndrome causes and genetics.
How Is Rett Syndrome Diagnosed?
Diagnosing Rett syndrome involves carefully observing a child’s behaviour and development over time. There is no single test that confirms the condition on its own. A doctor will look for specific patterns of symptoms and developmental history.
Clinical Diagnosis
To meet the clinical criteria for classic Rett syndrome, a child must show a period of regression followed by recovery or stabilization. They must also meet at least two of four main diagnostic criteria:
Partial or total loss of purposeful hand skills
Partial or total loss of spoken language
Problems with walking or balance (known as dyspraxia), or an inability to walk
Repetitive, purposeless hand movements such as wringing or rubbing
A doctor will also rule out other possible explanations for these symptoms, such as brain injury, severe infections, or neurometabolic diseases.
Genetic Testing
A blood test can check for the MECP2 gene mutation. This test confirms the diagnosis in more than 80% of girls suspected of having Rett syndrome. In some cases, the test may also give an idea of how severe the condition could be.
However, it is important to note that the MECP2 mutation also appears in other conditions. Finding this mutation alone is not enough to confirm Rett syndrome. A full clinical assessment is always needed alongside genetic testing.
Common Misdiagnoses
Rett syndrome is frequently misdiagnosed as autism, cerebral palsy, or a general developmental delay. This happens because the symptoms overlap with many other conditions. For this reason, it is important for children showing signs of developmental regression to be assessed by a specialist as soon as possible.
In Canada, developmental paediatricians and neurologists are the specialists typically involved in diagnosing Rett syndrome. Referrals are usually made through a family doctor or paediatrician.
Treatment and Support for Rett Syndrome
There is currently no cure for Rett syndrome. However, a well-coordinated treatment plan can significantly improve a child’s quality of life. Treatment focuses on managing symptoms and helping the child reach their highest possible level of independence.
Therapies That Help
A team of specialists typically works together to provide comprehensive care. This team may include physiotherapists, speech-language pathologists, occupational therapists, and behavioural specialists.
Physiotherapy helps maintain the ability to walk, improves balance, and increases flexibility.
Occupational therapy focuses on helping children use their hands with more intention and supports daily self-care skills.
Speech-language therapy works on communication skills, even for children who have lost spoken language. Alternative communication tools, such as picture boards or electronic devices, can be very helpful.
Behavioural support helps children engage socially and participate in school and community activities.
In addition, nutritional support may be needed. Many children with Rett syndrome have difficulty chewing and swallowing, which can affect their growth and overall health.
Medications
Medications do not treat the underlying cause of Rett syndrome, but they can help manage specific symptoms. For example, anti-seizure medications are often prescribed to control epilepsy. Other medications may address breathing irregularities, sleep problems, or muscle stiffness.
A child’s medication plan should always be reviewed regularly by their medical team. In Canada, provincial health plans may cover many of these medications, though coverage varies by province. It is worth speaking with your family doctor about what is available in your region.
Support for Families
Caring for a child with Rett syndrome can be emotionally and physically demanding. Support groups, respite care programmes, and community resources can make a real difference for families. Many provinces offer family support services through their health and social services programmes. Connecting with other families through organizations dedicated to Rett syndrome can also provide valuable guidance and encouragement.
For more information on supporting children with rare conditions, Health Canada’s resource centre provides guidance on navigating health services across the country.
When to See a Doctor
If you notice that your child has stopped reaching developmental milestones, or has started to lose skills they previously had, it is important to act quickly. Do not wait to see if things improve on their own.
Contact your family doctor or paediatrician right away if your child shows any of the following:
Loss of hand skills or purposeful movement
Regression in language or social behaviour
Unusual repetitive hand movements
Changes in walking or balance
Irregular breathing patterns
Slowed head growth
If you do not have a family doctor, a walk-in clinic can be a good first step. The clinic staff can assess your child and refer you to the appropriate specialist. Early assessment leads to earlier support, and that can make a significant difference in your child’s development and well-being.
Always speak with a qualified healthcare provider before making any decisions about your child’s health. Every child is different, and a personalized medical assessment is essential.
Frequently Asked Questions About Rett Syndrome
Is Rett syndrome the same as autism?
Rett syndrome is classified within the autism spectrum but is a distinct condition caused by a specific gene mutation called MECP2. While some behaviours overlap with autism, Rett syndrome has unique features such as loss of hand use, breathing irregularities, and a pattern of regression followed by stabilization. A specialist can tell the difference through careful assessment.
Can boys have Rett syndrome?
Rett syndrome almost exclusively affects girls. Boys who carry the MECP2 mutation typically do not survive because they have only one X chromosome, making the condition far more severe and usually fatal. Extremely rare cases of Rett syndrome in boys have been reported, but they are very uncommon.
What is the life expectancy for someone with Rett syndrome?
Many individuals with Rett syndrome live into adulthood, often into their 40s or 50s, with proper care and support. However, the condition does carry some risk of sudden, unexplained death, particularly related to heart rhythm abnormalities. Regular medical monitoring is an important part of long-term care for Rett syndrome.
Is Rett syndrome hereditary?
In most cases, Rett syndrome is not inherited from a parent. The MECP2 gene mutation typically occurs randomly and spontaneously. Therefore, parents of a child with Rett syndrome are not usually carriers, and the chance of having another affected child is generally low, though genetic counselling is always recommended.
How is Rett syndrome diagnosed in Canada?
In Canada, Rett syndrome is diagnosed by a developmental paediatrician or neurologist based on clinical observation and genetic blood testing. A referral from a family doctor or walk-in clinic is typically the first step. The MECP2 gene mutation can be confirmed in more than 80% of suspected cases through a blood test.
Is there a cure for Rett syndrome?
There is currently no cure for Rett syndrome. Treatment focuses on managing symptoms and improving quality of life through physiotherapy, speech-language therapy, occupational therapy, and medications. Research into potential gene-based therapies is ongoing, offering hope for future treatments for Rett syndrome.
Key Takeaways
Rett syndrome is a rare neurological disorder that affects brain development, almost always in girls.
It is caused by a random mutation in the MECP2 gene on the X chromosome and cannot be prevented.
Early signs include slowed head growth, loss of hand skills, repetitive hand movements, and regression in language and social behaviour.
Diagnosis involves both clinical observation and genetic blood testing, and Rett syndrome is often confused with autism or cerebral palsy.
There is no cure, but a team-based approach using physiotherapy, occupational therapy, speech-language therapy, and medication can greatly improve a child’s quality of life.
Canadian families should speak with their family doctor or visit a walk-in clinic if they notice any signs of developmental regression in their child.
Early intervention leads to better outcomes, so timely assessment is essential.
