KCNJ2 and Cardiodysrhythmic potassium-sensitive periodic paralysis: KCNJ2 has been implicated in Pierre Robin sequence [7] and Andersen-Tawil syndrome [8], which show abnormalities in tooth development (missing teeth, delays in eruption) and are characterized by craniofacial anomalies such as narrowing of the jaw and cleft palate [8].