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 3 patient data entries in database for mutations R627Q and R852C. Entry # | | Mutations |  | allele 1 | allele 2 |  
  | Clinical representation | Symptoms | Age group | Age of onset | Age of patient | Age of death | Reference |   |  | 146 | R852C1 G11D
  | R627Q5
  | Dementia/encephalopathy, infantile spasms, cerebral artery occlusion, headache/migraine, stroke, constipation. 74% mtDNA copy number in blood. |  |  | n/a | 25 | n/a | Tang et al, 2011; [view data]  |  | 625 | G11D R627Q5
  | R852C1
  | Seizures, PEO, Ataxia Neuropathy Spectrum, Stroke, chorea, ataxia, ptosis, retinitis pigmentosa, liver transplant | | - | movement disorder (ataxia) |  |
 
  |  | 15 | 19 | n/a | Wong et al, 2008; [view data]  |  | 628 | G11D R627Q5
  | R852C1
  | Ataxia Neuropathy Spectrum, Seizures, PEO, lactic acidosis, stroke, chorea, ataxia, ptosis, retinitis pigmentosa, liver transplans | | - | movement disorder (ataxia) |  |
 
  |  | 15 | n/a | n/a | Wong et al, 2008; [view data]  |  
 1-5 pathogenic cluster assignment of mutations. Mutations displayed without a superscript number are outside of the assigned pathogenic clusters. See cluster definitions for details. Number of displayed patient cases: 3 Avg age of onset in displayed cases: 18.3 Std dev in onset in displayed cases: 4.7
  
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