Table 2.

MERRF: Frequency of Select Features

Feature% of 62 Persons w/Feature 1% of 34 Persons w/Feature 2% of 321 Persons w/Feature 3
Myoclonus100%24%61%
Epilepsy100%35%43%
Normal early development100%
Ragged red fibers92%96%
Hearing loss91%35%39%
Lactic acidosis83%65%
Family history of MERRF81%
Exercise intolerance80%44%
Dementia75%25%
Neuropathy63%15%24%
Short stature57%
Impaired sensation50%
Optic atrophy39%
Cardiomyopathy33%12%
Arrhythmia22%18%
Pigmentary retinopathy15%
Pyramidal signs13%
Ophthalmoparesis11%6%6%
Lipomatosis3%32%8%
Diabetes mellitus12%3%
1.
2.
3.

Reviewed from the literature by Mancuso et al [2013]

From: MERRF

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