associations
Last reviewed 01/2018
Noonan's syndrome is associated with right-sided heart defects - in particular pulmonary artery stenosis, but also tetralogy of Fallot. By comparison Turner's syndrome is associated with left-sided heart defects.
There may be hypertrophic cardiomyopathy.
Mental retardation may occur in this condition, but is by no means a mandatory feature.
mental retardation (term that has been replaced by intellectual developmental disorder)