Diseases and Conditions
Noonan syndrome
Overview
Symptoms
Causes
Risk factors
Complications
Prevention
Diagnosis
Treatment
Coping and support
Preparing for an appointment
Risk factors
A parent with Noonan syndrome has a 50 percent chance (one chance in two) of passing the defective gene on to his or her child. The child who inherits the defective gene may have fewer or more symptoms than the affected parent.
