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3. Subtypes

There are 14 subtypes of Batten disease, named CLN1 to CLN14. Different mutations cause each subtype, and while there are many overlapping symptoms, each subset is unique. For example, CLN1 is known as infantile Batten disease. Symptoms start at around 18 months of age, whereas symptoms of CLN2 start between ages 2 and 4. CLN4 is the only variant caused by an autosomal dominant genetic pattern, with symptoms beginning around age 30. People with the CLN8 variant can live into their 50s, while the life expectancy for CLN10 is only days after birth.

digital medical image reading diagnosis batten disease

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