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Tay-Sachs Disease
Definition
A rare, fatal, autosomal recessive lipid storage disorder caused by mutations in the HEXA gene. It is characterized by deficiency of beta-hexosaminidase A, resulting in accumulation of gangliosides in the neurons of the brain and spinal cord. Signs and symptoms include progressive deterioration of the mental and physical abilities early in life, accompanied by blindness, deafness, muscle atrophy, and paralysis. (NCI Thesaurus)
More information
Tay-Sachs disease is a rare, inherited disorder. It causes too much of a fatty substance to build up in the brain. This buildup destroys nerve cells, causing mental and physical problems.
Infants with Tay-Sachs disease appear to develop normally for the first few months of life. Then mental and physical abilities decline. The child becomes blind, deaf, and unable to swallow. Muscles begin to waste away and paralysis sets in. Even with the best of care, children with Tay-Sachs disease usually die by age 4.
The cause is a gene mutation which is most common in Eastern European Ashkenazi Jews. To get the disease, both parents must have the gene. If they do, there is a 25% chance of the child having the disease. A blood test and prenatal tests can check for the gene or the disease.
There is no cure. Medicines and good nutrition can help some symptoms. Some children need feeding tubes. (NIH: National Institute of Neurological Disorders and Stroke)