What are the common abnormalities of head size in pediatrics?
The most common abnormalities of head size in children are microcephaly and macrocephaly. Microcephaly refers to a head circumference below the 3rd percentile for age and sex, while macrocephaly refers to a head circumference above the 97th percentile.
What causes microcephaly in infants?
Microcephaly can result from genetic disorders, congenital infections such as toxoplasmosis and rubella, prenatal exposure to alcohol or drugs, severe malnutrition, metabolic disorders, or brain injury during fetal development.
What are the major causes of macrocephaly in children?
Macrocephaly can occur due to hydrocephalus, megalencephaly, benign familial macrocephaly, intracranial tumors, metabolic storage diseases, or subdural hematoma.
What is craniosynostosis in pediatrics?
Craniosynostosis is a condition in which one or more cranial sutures close prematurely, restricting normal skull growth and causing abnormal head shapes such as scaphocephaly, brachycephaly, or trigonocephaly.
How is head circumference measured in infants?
Head circumference is measured using a non-stretchable measuring tape placed around the largest occipitofrontal circumference, passing over the most prominent part of the occiput and the forehead just above the eyebrows.
What is positional plagiocephaly in infants?
Positional plagiocephaly is a flattening of one side of the head caused by prolonged pressure on the same area, usually due to sleeping position or limited neck movement. It is not caused by premature suture fusion.
What are the warning signs of abnormal head growth in children?
Warning signs include rapid increase in head size, bulging fontanelle, persistent vomiting, developmental delay, seizures, abnormal skull shape, and signs of increased intracranial pressure.
How is craniosynostosis diagnosed?
Craniosynostosis is diagnosed through clinical examination, skull imaging such as CT scan with 3D reconstruction, and sometimes genetic testing if a syndromic condition is suspected.
What is the treatment for craniosynostosis?
The main treatment for craniosynostosis is surgical correction to reopen fused sutures, relieve intracranial pressure, and allow normal brain and skull growth.
When should abnormal head size in children be evaluated urgently?
Urgent evaluation is required when there is rapid head enlargement, developmental regression, seizures, persistent vomiting, or signs of raised intracranial pressure.
