Canavan disease is a condition that affects how the body breaks down and uses aspartic acid.
Canavan disease is passed down (inherited) through families. It is more common among the Ashkenazi Jewish population than in the general population.
The lack of the enzyme aspartoacylase leads to a buildup of material called N-acetylaspartic acid in the brain. This causes the white matter of the brain to break down.
There are two forms of the disease:
Symptoms often begin in the first year of life. Parents tend to notice it when their child is not reaching certain developmental milestones, including head control.
A physical exam may show:
Tests for this condition include:
There is no specific treatment available. Supportive care is very important to ease the symptoms of the disease. Lithium and gene therapy are being studied.
The following resources can provide more information on Canavan disease:
With Canavan disease, the central nervous system breaks down. People are likely to become disabled.
Those with the neonatal form often do not live beyond childhood. Some children may live into their teens. Those with the juvenile form often live a normal lifespan.
This disorder nay cause severe disabilities such as:
Call your health care provider if your child has any symptoms of Canavan disease.
Genetic counseling is recommended for people who want to have children and have a family history of Canavan disease. Counseling should be considered if both parents are of Ashkenazi Jewish descent. For this group, DNA testing can almost always tell if the parents are carriers.
A diagnosis may be made before the baby is born (prenatal diagnosis) by testing the amniotic fluid, the fluid that surrounds the womb.
Reviewed By: Anna C. Edens Hurst, MD, MS, Assistant Professor in Medical Genetics, The University of Alabama at Birmingham, Birmingham, AL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.