# What are congenital brain malformations? Canonical page: https://clinicsjo.com/en/faq/what-are-congenital-brain-malformations Language: en Category: neurology Publisher: ClinicsJo Published: 2026-09-13T08:09:50.904Z Content updated: 2026-09-13T08:09:50.904Z Translation (ar): https://clinicsjo.com/ar/faq/what-are-congenital-brain-malformations Congenital brain malformations are a group of conditions that occur when the central nervous system, particularly the brain, does not develop normally before a child is born. These malformations often begin early in pregnancy and may result from damage to the developing nervous system or abnormal development. Parts of the brain may be missing, abnormally small or large, or incompletely developed [\[1\]](). There are many causes for these malformations; in some cases, the problem is genetic. In other instances, exposure to certain medications, infections, or radiation during pregnancy may hinder brain development [\[1\]](). It is important to note that some head malformations do not involve the brain itself but relate to the development of soft tissues and bones in the face and head [\[1\]](). ## When do congenital brain malformations occur? Most congenital brain malformations occur in the early stages of pregnancy. For example, neural tube defects, such as spina bifida, happen when the neural tube does not form correctly. The neural tube consists of a special group of cells; its upper part becomes the brain, while the remaining part becomes the spinal cord and surrounding structures. Typically, the neural tube folds and closes between the third and fourth weeks of pregnancy to form the fetus's brain and spinal cord [\[3\]](). Other problems in brain and spinal cord development can also arise during neuronal migration, which is the process where brain cells move from their point of origin to where they will ultimately reside. When neuronal migration is disrupted, congenital brain defects occur [\[3\]](). ## Common types of congenital brain malformations Congenital brain malformations include a wide range of conditions, such as: - **Agenesis of the Corpus Callosum:** A condition where the main structure connecting the right and left hemispheres of the brain is partially or completely missing [\[3\]](). This condition can occur alone or in combination with other brain conditions [\[3\]](). - **Aicardi syndrome:** A rare genetic neurological disorder primarily affecting females, characterized by the partial or total absence of the corpus callosum, retinal defects, and seizures appearing within the first year of life [\[2\]]()[\[3\]](). - **Microcephaly:** A medical condition where the head is small due to the brain not fully developing or ceasing to grow [\[3\]](). It can be present at birth or develop in the first few years of life [\[3\]](). - **Anencephaly:** A rare neurological disorder involving a defect in the closure of the neural tube during fetal development; infants born with this condition lack a forebrain [\[3\]](). - **Dandy-Walker syndrome:** A brain disorder caused by abnormal formation between the cerebellum and the fluid-filled spaces around it [\[3\]](). - **Hydrocephalus:** Excessive accumulation of fluid in the brain [\[3\]](). ## Early diagnosis and its importance Early diagnosis of congenital brain malformations is crucial for providing the necessary support and care for the child and family. Diagnostic methods can include imaging tests such as brain magnetic resonance imaging (MRI) [\[1\]](), cranial ultrasound [\[1\]](), and head computed tomography (CT) [\[1\]](). These exams help identify the nature of the malformation and the extent of its impact. ## Family support and ongoing care Treatment depends on the specific problem [\[1\]](). In many cases, treatment focuses on relieving symptoms [\[1\]](). This may include anti-seizure medications, shunts to drain fluid from the brain, or physical therapy [\[1\]](). It is essential that families receive psychological and social support to help them cope with the challenges associated with these conditions. Regular follow-up with neurologists, endocrinologists, and ophthalmologists is necessary to check for any problems related to the condition [\[3\]](). You can read more about [Congenital Brain Malformations: Early Diagnosis and Family Support (Arabic)](). ## Medical references - [Brain Malformations]() - [Birth Disorders of the Brain and Spinal Cord]() - [Aicardi syndrome: MedlinePlus Genetics]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/what-are-congenital-brain-malformations#answer