Table 1

Diagnostic possibilities in children with longstanding diagnoses of “ataxic” or “dyskinetic” cerebral palsy (CP) showing slow progression in second decade of life

▸ “Ataxic CP”Slowly growing posterior fossa lesions
Ataxia telangectasia
Metachromatic leukodystrophy
GM2 gangliosidosis
Salla disease
▸ “Dystonic CP” (unusual for other potential differential diagnoses not to have declared in the first decade of life)Sandifer syndrome (dystonic movements of head and neck related to gastro-oesphageal reflux)
Late variants of Leigh disease