1 | Alpers’ syndrome | 19 months | Yes | Generalised | No | ? | Yes | Alpers’ | “mitochondrial” | Alpers’ |
2 | Alpers’ syndrome | 8 months | Yes | Myoclonic | No | Yes | Yes | Alpers’ | Normal | ND |
3 | Mitochondrial encephalomyopathy | 3¼ years | Yes | Myoclonic | No | ND | No | “mitochondrial” | “mitochondrial” | ND |
4 | Mitochondrial encephalomyopathy | 1 year | No | Myoclonic | No | Yes | Yes | ND | ND | ND |
5 | Mitochondrial encephalomyopathy | 9 months | Yes | Generalised | No | No | Yes | “mitochondrial” | Normal | ND |
6 | HIV encephalopathy | 6 months | No | Spasms | No | ? | Yes | ND | ND | ND |
7 | Neuronal ceroid lipofuscinosis | 6½ years | Yes | Generalised | No | No | Yes | ND | ND | Not Alpers’ |
8 | Undiagnosed neurodegenerative disorder | 1½ years | No | Generalised | No | No | Yes | ND | ND | ND |
9 | Undiagnosed neurodegenerative disorder | 1 year | Yes | Generalised | No | No | No | Normal | Normal | ND |
10 | Undiagnosed neurodegenerative disorder | 2 years | No | Generalised | “Alpersish” | No | Yes | Fatty change only | ND | ND |
11 | Undiagnosed neurodegenerative disorder | 4 months | No | Generalised | No | ? | No | ND | ND | ND |