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Category FAQs Search : Leigh Syndrome (Leigh’s Disease)

Question: What is the outlook for someone with Leigh syndrome (Leigh’s disease)?

Answer: Many children with Leigh syndrome pass away from respiratory failure by age 3. It’s rare for a child with early-onset Leigh syndrome to survive into their teen years. People with adult-onset Leigh syndrome can live past their 50s.

(Source: Cleveland Clinic, 21 Nov 2025)

Source Link: https://my.clevelandclinic.org/health/diseases/6037-leigh-syndrome-leighs-disease