| 1 patient data entry in database for mutations L304R and A143V. | 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] | 
 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. |