Table 2

Clinical features of mitochondrial disease

Neuromuscular (for review see ref 97)
 External ophthalmoplegia and ptosis6 7
 Sensorineural deafness105 106
 Myopathy51 65
 Migraine107 108
 Seizures/myoclonus109 110
 Encephalomyopathy28 111
 Dementia71 111
 Ataxia112
 Stroke-like episodes113
 Parkinsonism/dystonia114
 Spastic paraparesis115
 Peripheral neuropathy116
 Rhabdomyolysis60
 Optic atrophy109
 Pigmentary retinopathy109
Cardiac
 Hypertrophic cardiomyopathy43
 Accessory pathways117 118
 Heart block119
Endocrine
 Diabetes mellitus99 120
 Hypoparathyroidism121 122 123
 Hypogonadism124
 Infertility125
Gastrointestinal
 Dysphagia96
 Cyclical vomiting72 126
 Pseudo-obstruction127 128
Renal
 Aminoaciduria129
 Renal tubular dysfunction130
 Tubulointerstitial disease131
 Toni-Fanconi-Debre syndrome132 133
 Barrter syndrome134
Haematological
 Sideroblastic anaemia135
 Pancytopenia135
Pancreas and liver
 Exocrine pancreatic failure136
 Hepatocellular failure137
Pyschiatric
 Depression138 139
 Psychotic illness140
Dermatological
 Lipomatosis141