Total 39 clinical symptoms reported for KBG syndrome  Occasional (4)Frequent (35)

Congenital malformation of the left heart	Defect or defects of the morphogenesis of the left heart identifiable at birth.	Occasional
Persistent open anterior fontanelle	The anterior fontanelle generally ossifies by around the 18th month of life. A persistent open anterior fontanelle is diagnosed if closure is delayed beyond this age.   Synonyms:Front fontanelle stays open; Persistent, open anterior fontanel	Occasional
Round face	The facial appearance is more circular than usual as viewed from the front.   Synonyms:Circular face; Round face; Round facial appearance; Round facial shape; Round facies	Occasional
Seizure	A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.   Synonyms:Epileptic seizure; Seizures	Occasional