Apr 29, · The infantile form of GM2 and GM1 gangliosidosis diseases ("classic" infantile) is the most common. Infants with Tay-Sachs disease, Sandhoff disease or GM1 gangliosidosis appear normal at birth, but at approximately months of age begin to manifest progressive weakness and loss of muscle strength, such as loss of the ability to sit up or turn over. afflicted by the juvenile form of Tay-Sachs usually do not live past their teenage years. Late onset/adult Tay-Sachs is the least severe form, with its symptoms appearing from late childhood to adulthood. Victims of late onset/adult Tay-Sachs can either live a shortened life or an unaffected life. The normal function of the HEXA gene is to give instructions to proteins on .
The late onset form is highly variable. This means that it affects people very differently. Sometimes symptoms begin in the teen-age years, while other times people aren't diagnosed until well into adulthood. Because of this variability, making statements about prognosis for late onset Tay-Sachs disease is difficult. Adult-onset Tay-Sachs is a milder disease with later onset and slower progression. In adults, Tay-Sachs disease is associated with variable neurological findings, including progressive dystonia, spinocerebellar degeneration, motor neuron disease, and bipolar form of psychosis. Incidence: 1 in Ashkenazi Jewish individuals.
Jan 05, · Symptoms appear during adolescence or adulthood. People with the adult form of Tay-Sachs disease usually have these symptoms: muscle weakness; slurred speech; unsteady gait; memory problems; tremors. Tay-Sachs disease is characterized by progressive weakness, loss of motor skills, decreased attentiveness, and increased startle response beginning between ages three and six months with progressive evidence of neurodegeneration including: seizures, blindness, spasticity, eventual total incapacitation, and death, usually before age four years.