Table 1

Clinical and molecular genetic data

PatientsAge onsetSexNeurological signsMRI/CT% Mutant mtDNA
Peripheral neuropathyRetinopathyMental retardationBasal gangliaBrainstemCerebellar atrophyBloodFibroblastsMuscle
Ped AIV/23 monthsMND++++++>95>95>95
Ped BIII/16 monthsFND++++++++NDND>95
Ped CIII/16 monthsFND+++++++++ +++>957385
II/110 yF+++++NDNDND6681ND
II/28 yM+++++++NDNDND78NDND
II/310 yF+++++++++76NDND
II/412 yF++++++++++58NDND
Ped DIII/15 yM++++++++838383
Ped EII/14 yM++++++++++NDND87
Ped FIV/51 yM+++++++85NDND
Ped FIII/1032 yF+++55NDND
  • = Normal or absent; + = mild alterations; ++ = moderate alterations; +++ = severe alterations; ND = not determined.