Onset of symptoms is normally within the first year of life with truncal ataxia and seizures. The head is small (microcephaly). Common facial abnormalities include * Long narrow face * Prominent nose * Prominent jaw * Large ears * Open mouth * Thick eyebrows Other common features include * Uncontrolled drooling * Abnormal eye movements The associated intellectual disablity is usually in the profound range. Those affected often have a happy demeanor with frequent smiling and spontaneous laughter.
Christianson syndrome
Cohen syndrome
Noonan syndrome
Goldenhar syndrome
Sugarman syndrome
Laron syndrome
Kenny-Caffey syndrome
Cohen-Gibson syndrome