Aim: Noonan syndrome is a rare genetic alteration; the responsible gene is located on the long arm of chromosome 12.
Case report: The authors examined a caucasic girl of eight years with Noonan syndrome. The patient had systemic problems, such as: otitis, heart trouble, language disturbances and asymmetry of the lower limbs. Light mental delay was also found. She had the bad habit of sucking the lower lip. The treatment plan was extraction of some teeth, sealing of first molars and orthodontic treatment with functional appliance.