Microcephaly Information Page

Microcephaly Information Page


What research is being done?

The National Institute of Neurological Disorders and Stroke (NINDS), one of several institutes of the National Institutes of Health (NIH), conducts and funds research aimed at understanding normal brain development, as well as disease-related disorders of the brain and nervous system. Other NIH institutes and centers also support research on disorders that may affect development. Among several projects, scientists are studying genetic mechanisms and identifying novel genes involved with brain development.  Animal models are helping scientists to better understand the pathology of human disease, and to discover how the sizes of tissues and organs are impacted by developmental variability. Other researchers hope to gain a better understanding of normal brain development and the molecular and cellular mechanisms of microcephaly.

Information from the National Library of Medicine’s MedlinePlus
Microcephaly

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What research is being done?

The National Institute of Neurological Disorders and Stroke (NINDS), one of several institutes of the National Institutes of Health (NIH), conducts and funds research aimed at understanding normal brain development, as well as disease-related disorders of the brain and nervous system. Other NIH institutes and centers also support research on disorders that may affect development. Among several projects, scientists are studying genetic mechanisms and identifying novel genes involved with brain development.  Animal models are helping scientists to better understand the pathology of human disease, and to discover how the sizes of tissues and organs are impacted by developmental variability. Other researchers hope to gain a better understanding of normal brain development and the molecular and cellular mechanisms of microcephaly.

Information from the National Library of Medicine’s MedlinePlus
Microcephaly

The National Institute of Neurological Disorders and Stroke (NINDS), one of several institutes of the National Institutes of Health (NIH), conducts and funds research aimed at understanding normal brain development, as well as disease-related disorders of the brain and nervous system. Other NIH institutes and centers also support research on disorders that may affect development. Among several projects, scientists are studying genetic mechanisms and identifying novel genes involved with brain development.  Animal models are helping scientists to better understand the pathology of human disease, and to discover how the sizes of tissues and organs are impacted by developmental variability. Other researchers hope to gain a better understanding of normal brain development and the molecular and cellular mechanisms of microcephaly.

Information from the National Library of Medicine’s MedlinePlus
Microcephaly

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Definition
Definition
Treatment
Treatment
Prognosis
Prognosis
Clinical Trials
Clinical Trials
Organizations
Organizations
Publications
Publications
Definition
Definition

Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing.  Microcephaly can be present at birth or it may develop in the first few years of life.  It is most often caused by genetic abnormalities that interfere with the growth of the cerebral cortex during the early months of fetal development.  Babies may also be born with microcephaly if, during pregnancy, their mother abused drugs or alcohol; became infected with a cytomegalovirus, rubella (German measles), varicella (chicken pox) virus, or possibly Zika virus; was exposed to certain toxic chemicals; or had untreated phenylketonuria (PKU, a harmful buildup of the amino acid phenylalanine in the blood).  Microcephaly is associated with Down’s syndrome, chromosomal syndromes, and neurometabolic syndromes.

With viral-induced brain injury, such as with the Zika virus, there is often widespread tissue and cell death leading to brain shrinkage rather than simply impaired growth.  The Zika virus is also associated with retinal lesions in about a third of cases, often leading to blindness.

Depending on the severity of the accompanying syndrome, children with microcephaly may have impaired cognitive development, delayed motor functions and speech, facial distortions, dwarfism or short stature, hyperactivity, seizures, difficulties with coordination and balance, and other brain or neurological abnormalities.  

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Definition

Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing.  Microcephaly can be present at birth or it may develop in the first few years of life.  It is most often caused by genetic abnormalities that interfere with the growth of the cerebral cortex during the early months of fetal development.  Babies may also be born with microcephaly if, during pregnancy, their mother abused drugs or alcohol; became infected with a cytomegalovirus, rubella (German measles), varicella (chicken pox) virus, or possibly Zika virus; was exposed to certain toxic chemicals; or had untreated phenylketonuria (PKU, a harmful buildup of the amino acid phenylalanine in the blood).  Microcephaly is associated with Down’s syndrome, chromosomal syndromes, and neurometabolic syndromes.

With viral-induced brain injury, such as with the Zika virus, there is often widespread tissue and cell death leading to brain shrinkage rather than simply impaired growth.  The Zika virus is also associated with retinal lesions in about a third of cases, often leading to blindness.

Depending on the severity of the accompanying syndrome, children with microcephaly may have impaired cognitive development, delayed motor functions and speech, facial distortions, dwarfism or short stature, hyperactivity, seizures, difficulties with coordination and balance, and other brain or neurological abnormalities.  

Treatment
Treatment

There is no treatment for microcephaly that can return a child’s head to a normal size or shape. Treatment focuses on ways to decrease the impact of the associated deformities and neurological disabilities. Children with microcephaly and developmental delays are usually evaluated by a pediatric neurologist and followed by a medical management team. Early childhood intervention programs that involve physical, speech, and occupational therapists help to maximize abilities and minimize dysfunction. Medications are often used to control seizures, hyperactivity, and neuromuscular symptoms. Genetic counseling may help families understand the risk for microcephaly in subsequent pregnancies.

×
Treatment

There is no treatment for microcephaly that can return a child’s head to a normal size or shape. Treatment focuses on ways to decrease the impact of the associated deformities and neurological disabilities. Children with microcephaly and developmental delays are usually evaluated by a pediatric neurologist and followed by a medical management team. Early childhood intervention programs that involve physical, speech, and occupational therapists help to maximize abilities and minimize dysfunction. Medications are often used to control seizures, hyperactivity, and neuromuscular symptoms. Genetic counseling may help families understand the risk for microcephaly in subsequent pregnancies.

Definition
Definition

Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing.  Microcephaly can be present at birth or it may develop in the first few years of life.  It is most often caused by genetic abnormalities that interfere with the growth of the cerebral cortex during the early months of fetal development.  Babies may also be born with microcephaly if, during pregnancy, their mother abused drugs or alcohol; became infected with a cytomegalovirus, rubella (German measles), varicella (chicken pox) virus, or possibly Zika virus; was exposed to certain toxic chemicals; or had untreated phenylketonuria (PKU, a harmful buildup of the amino acid phenylalanine in the blood).  Microcephaly is associated with Down’s syndrome, chromosomal syndromes, and neurometabolic syndromes.

With viral-induced brain injury, such as with the Zika virus, there is often widespread tissue and cell death leading to brain shrinkage rather than simply impaired growth.  The Zika virus is also associated with retinal lesions in about a third of cases, often leading to blindness.

Depending on the severity of the accompanying syndrome, children with microcephaly may have impaired cognitive development, delayed motor functions and speech, facial distortions, dwarfism or short stature, hyperactivity, seizures, difficulties with coordination and balance, and other brain or neurological abnormalities.  

Treatment
Treatment

There is no treatment for microcephaly that can return a child’s head to a normal size or shape. Treatment focuses on ways to decrease the impact of the associated deformities and neurological disabilities. Children with microcephaly and developmental delays are usually evaluated by a pediatric neurologist and followed by a medical management team. Early childhood intervention programs that involve physical, speech, and occupational therapists help to maximize abilities and minimize dysfunction. Medications are often used to control seizures, hyperactivity, and neuromuscular symptoms. Genetic counseling may help families understand the risk for microcephaly in subsequent pregnancies.

Prognosis
Prognosis

Some children with microcephaly will have normal intelligence and a head that will grow bigger, but they may track below the normal growth curves for head circumference.  Some children may have only mild disability, while those with more severe cases may face significant learning disabilities, cognitive delays, or develop other neurological disorders.  Many, if not most, cases if Zika microcephaly will be very severe, possibly requiring lifelong intensive care.

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Some children with microcephaly will have normal intelligence and a head that will grow bigger, but they may track below the normal growth curves for head circumference.  Some children may have only mild disability, while those with more severe cases may face significant learning disabilities, cognitive delays, or develop other neurological disorders.  Many, if not most, cases if Zika microcephaly will be very severe, possibly requiring lifelong intensive care.

Prognosis
Prognosis

Some children with microcephaly will have normal intelligence and a head that will grow bigger, but they may track below the normal growth curves for head circumference.  Some children may have only mild disability, while those with more severe cases may face significant learning disabilities, cognitive delays, or develop other neurological disorders.  Many, if not most, cases if Zika microcephaly will be very severe, possibly requiring lifelong intensive care.

Definition

Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing.  Microcephaly can be present at birth or it may develop in the first few years of life.  It is most often caused by genetic abnormalities that interfere with the growth of the cerebral cortex during the early months of fetal development.  Babies may also be born with microcephaly if, during pregnancy, their mother abused drugs or alcohol; became infected with a cytomegalovirus, rubella (German measles), varicella (chicken pox) virus, or possibly Zika virus; was exposed to certain toxic chemicals; or had untreated phenylketonuria (PKU, a harmful buildup of the amino acid phenylalanine in the blood).  Microcephaly is associated with Down’s syndrome, chromosomal syndromes, and neurometabolic syndromes.

With viral-induced brain injury, such as with the Zika virus, there is often widespread tissue and cell death leading to brain shrinkage rather than simply impaired growth.  The Zika virus is also associated with retinal lesions in about a third of cases, often leading to blindness.

Depending on the severity of the accompanying syndrome, children with microcephaly may have impaired cognitive development, delayed motor functions and speech, facial distortions, dwarfism or short stature, hyperactivity, seizures, difficulties with coordination and balance, and other brain or neurological abnormalities.  

Treatment

There is no treatment for microcephaly that can return a child’s head to a normal size or shape. Treatment focuses on ways to decrease the impact of the associated deformities and neurological disabilities. Children with microcephaly and developmental delays are usually evaluated by a pediatric neurologist and followed by a medical management team. Early childhood intervention programs that involve physical, speech, and occupational therapists help to maximize abilities and minimize dysfunction. Medications are often used to control seizures, hyperactivity, and neuromuscular symptoms. Genetic counseling may help families understand the risk for microcephaly in subsequent pregnancies.

Prognosis

Some children with microcephaly will have normal intelligence and a head that will grow bigger, but they may track below the normal growth curves for head circumference.  Some children may have only mild disability, while those with more severe cases may face significant learning disabilities, cognitive delays, or develop other neurological disorders.  Many, if not most, cases if Zika microcephaly will be very severe, possibly requiring lifelong intensive care.

What research is being done?

The National Institute of Neurological Disorders and Stroke (NINDS), one of several institutes of the National Institutes of Health (NIH), conducts and funds research aimed at understanding normal brain development, as well as disease-related disorders of the brain and nervous system. Other NIH institutes and centers also support research on disorders that may affect development. Among several projects, scientists are studying genetic mechanisms and identifying novel genes involved with brain development.  Animal models are helping scientists to better understand the pathology of human disease, and to discover how the sizes of tissues and organs are impacted by developmental variability. Other researchers hope to gain a better understanding of normal brain development and the molecular and cellular mechanisms of microcephaly.

Information from the National Library of Medicine’s MedlinePlus
Microcephaly

Patient Organizations
Birth Defect Research for Children, Inc.
976 Lake Baldwin Lane
Suite 104
Orlando
FL
Orlando, FL 32814
Tel: 407-895-0802
March of Dimes
1275 Mamaroneck Avenue
White Plains
NY
White Plains, NY 10605
Tel: 914-997-4488; 888-MODIMES (663-4637)
National Dissemination Center for Children with Disabilities
U.S. Dept. of Education, Office of Special Education Programs
1825 Connecticut Avenue NW, Suite 700
Washington
DC
Washington, DC 20009
Tel: 800-695-0285; 202-884-8200
The Arc of the United States
1825 K Street, NW
Suite 1200
Washington
DC
Washington, DC 20006
Tel: 202-534-3700; 800-433-5255
Patient Organizations