Inclusion Criteria- Patients diagnosed with or suspected to have a mitochondrial disorder
- Adult carriers of known mitochondrial DNA mutations
- Patients with laboratory analysis indicative of a mitochondrial disorder.
- Medical information and tissue samples are also accepted from deceased individuals who fulfill the above criteria.
Exclusion Criteria- Patients not suspected of having a mitochondrial disorder
- Patients not suspected of carrying a mitochondrial DNA or nuclear DNA mutation that affects mitochondrial function.