| A cerebral malformation with epilepsy with predominant characteristics of posterior isolated lissencephaly with developmental delay, intellectual disability and epilepsy that usually evolves from West syndrome to Lennox-Gastaut syndrome. Additional features include muscular hypotonia, acquired microcephaly, failure to thrive and poor control of airways leading to aspiration pneumonia. Caused by heterozygous mutation in the PAFAH1B1 gene on chromosome 17p13. |
