Agenesis of the corpus callosum is the complete or partial absence of the corpus callosum. This is a structure that connects the two sides of the brain and allows information to pass between them.
This condition can cause symptoms such as developmental delays, seizures, coordination problems, and difficulty with reasoning. However, some people have few or no symptoms.
Agenesis of the corpus callosum is usually caused by genetic changes or exposure to alcohol during pregnancy. If this condition is suspected, a pediatric neurologist or neurologist can confirm the diagnosis and recommend treatment, which may include seizure medication, physical therapy, and occupational therapy.
What is the corpus callosum?
The corpus callosum is a structure in the brain made up of nerve fibers. It connects the right and left hemispheres of the brain, helping organize information and allowing nerve signals to move between both sides.
The corpus callosum is also involved in functions such as muscle movement, language, vision, hearing, smell, taste, touch, memory, and reasoning.
Main symptoms
The main symptoms of agenesis of the corpus callosum include:
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Difficulty with reasoning
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Learning problems
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Developmental delays, especially speech delays
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Seizures
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Poor motor coordination
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Difficulties with communication and social interaction
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Inattention
However, agenesis of the corpus callosum may cause few or no symptoms, especially when no other brain abnormalities are present.
In some cases, symptoms may be similar to those associated with ADHD or autism.
Confirming a diagnosis
Agenesis of the corpus callosum should be diagnosed by a pediatric neurologist in children or a neurologist in adults. Diagnosis is confirmed with imaging tests, such as magnetic resonance imaging (MRI).
However, agenesis of the corpus callosum is often identified during pregnancy through an ultrasound ordered by an obstetrician as part of prenatal care.
Possible causes
Agenesis of the corpus callosum may be caused by genetic changes or alcohol use during pregnancy. According to the CDC, alcohol exposure during pregnancy can affect the baby’s developing brain and central nervous system, and there is no known safe amount of alcohol use during pregnancy.
This condition is more common in pregnancies after age 40. It may also be associated with metabolic disorders in the pregnant person or baby, such as phenylketonuria (PKU).
Treatment options
Agenesis of the corpus callosum has no cure, which means the corpus callosum cannot be restored. According to UCSF Fetal Treatment Center, treatment after birth focuses on managing symptoms and supporting development and learning.
A doctor may recommend medication to control seizures, speech therapy for feeding or speech difficulties, physical therapy to improve muscle strength and coordination, and occupational therapy to help the person develop independence.
Life expectancy
Agenesis of the corpus callosum does not always affect life expectancy. Many people can live a normal life, especially when there are no other brain malformations or significant symptoms.