Total 103 clinical symptoms reported for ZTTK syndrome  Very Frequent (3)Occasional (84)Frequent (15)Always (1)

Abnormal brain morphology	A structural abnormality of the brain, which has as its parts the forebrain, midbrain, and hindbrain.   Synonyms:Abnormal shape of brain; Abnormality of brain morphology; Abnormality of the brain	Very frequent
Abnormal facial shape	An abnormal morphology (form) of the face or its components.   Synonyms:Abnormal facial shape; Abnormal morphology of the face; Distinctive facies; Dysmorphic facial features; Dysmorphic facies; Facial dysmorphism; Unusual facial appearance; Unusual facies	Very frequent
Global developmental delay	A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.   Synonyms:Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; GDD; Lack of psychomotor development; Motor and developmental delay; Motormental retardation; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development	Very frequent