Previous studies suggested that MAST1 was a novel candidate gene associated with multiple neurological diseases, including mega-corpus-callosum syndrome, cerebral palsy, developmental delay and intellectual disability (McMichael et al., 2015; Tripathy et al., 2018; Ben-Mahmoud et al., 2020; Rodríguez-García et al., 2020). The gene discussed is MAST1; the disease is Global developmental delay.