This study aimed to systematically investigate the genotype-specific course of the disease including neurodevelopmental outcome, medical complications, use of non-pharmacological supportive therapies, and its impact on the quality of life of the affected families.<h4>Methods</h4>47 patients with genetically and radiologically confirmed lissencephaly were included with mutation in LIS1/PAFAH1B1 (n = 38), DCX (n = 5 males), DYNC1H1 (n = 2), TUBA1A (n = 1) and TUBG1 (n = 1) genes. This evidence concerns the gene DCX and lissencephaly spectrum disorders.