Diagnosis of Rett Syndrome
Diagnosis is based on clinical criteria and confirmed by genetic testing:
Clinical criteria:
- Regression in motor and communication skills
- Hand stereotypies
- Gait abnormalities
- Loss of social engagement
Genetic testing:
- DNA analysis of the MECP2 gene
- Testing for other associated genes in atypical variants (e.g., CDKL5, FOXG1)
Neurophysiological and imaging tests:
- EEG abnormalities (often evolving with age)
- Brain MRI may show nonspecific cerebral atrophy
- Early diagnosis allows for timely initiation of therapy and access to clinical trials.