Objective To investigate the clinical features,diagnosis and treatment of glucose transporter 1 deficiency syndrome (GLUT1-DS),as well as the diagnostic value of movement disorders.Methods The clinical data of four children with GLUT1-DS were collected,and their clinical features,treatment,and follow-up results were analyzed.Results There were two boys and two girls,with an age of onset of 2-15 months.Clinical manifestations included movement disorders,seizures,and developmental retardation.Seizures were th...