Overview
Porencephaly is a structural abnormality of the brain. It may manifest before or after birth. It is a very rare disorder that affects your central nervous system, children with this condition develop fluid-filled cavities, or cysts, on their brain. These brain cysts can delay and impair your child’s growth and development. These cysts can interfere with normal brain growth and development. Children with porencephaly may experience speech difficulties. They may also have other neurological deficits (abnormal functioning in areas of their body).However, on rare occasions, it can be related to an inherited genetic condition. There is no clear cure for porencephaly. However, there are many ways to manage its effects. Treatments focus on improving neurological impairments. If hydrocephalus is present, excess fluid around your child’s brain can be drained.
SYMPTOMS
Possible symptoms include:
- Motor delay (differences in muscle tone, movement, posture, or developmental milestones)
- Speech and language delay
- Learning challenges
- Cognitive or intellectual differences
- Slow overall growth
- Developmental delays in multiple areas (global delays)
- Seizures
- Spastic hemiplegia (stiffness and weakness in limbs)
- Hypotonia (low muscle tone)
- Macrocephaly (large head)
- Microcephaly (small head)
- Hydrocephalus (increased pressure in the brain)
Causes
With a lack of oxygen or bleeding in your child’s brain, fluid-filled cysts can replace normal brain tissue. This is more likely to happen if the following risk factors are present:
- Alcohol or drug use during pregnancy.
- Gestational diabetes.
- Infection during pregnancy.
- Infection shortly after birth.
- Trauma during birth.
- Other causes of stroke or lack of oxygen to their brain (like blood disorders and metabolic diseases). Sometimes, healthcare providers can find clues about the underlying cause based on the location, size and distribution of the cysts.
- Some types of porencephaly are genetic and can be inherited. This means that a person only needs one abnormal gene copy to show symptoms. The abnormal gene can be inherited from a mother or father. A person with a COL4A1 or COL4A2 gene mutation has a 50 percent chance of passing on condition. Two people with the same mutation may have very different symptom severity.
Diagnosis
To confirm a diagnosis of porencephaly, your healthcare provider needs to see detailed images of your child’s brain. You or your child may have imaging tests like:
- Prenatal ultrasound or ultrasound.
- CT scan.
- MRI.
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