| 2 patient data entries in database for clusters 1 and 3 in age group "juvenile". | Entry #
 | | Mutations |  | allele 1 | allele 2 | 
 | Clinical representation | Symptoms | Age group | Age of onset | Age of patient | Age of death | Reference |  |  |  | 10 | L304R3 
 | A143V1 
 | Cerebral cavernous malformation, teen onset CPEO.  110% mtDNA copy number in blood. |  |  | n/a | 22 | n/a | Tang et al, 2011; [view data] |  | 202 | G1051R3 
 | H932Y1 
 | PEO, erectile dysfunction, progressive hearing loss, dysarthria, ataxic gait, Romberg sign, severe peripheral axonal sensorimotor polyneuropathy. | | - | movement disorder (ataxia) |  |
 | - | axonal sensorimotor polyneuropathy |  |
 |  | 18 | 35 | n/a | Mancuso et al, 2004a; [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: 2Avg age of onset in displayed cases: 20.0
 Std dev in onset in displayed cases: 2.0
 
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