Cleft posterior mitral valve leaflet in an adult with Turner syndrome diagnosed with the use of 3-dimensional transesophageal echocardiography.

Turner syndrome is a monosomy (45,X karyotype) in which the prevalence of cardiovascular anomalies is high. However, this aspect of Turner syndrome has received little attention outside of the pediatric medical literature, and the entire spectrum of cardiovascular conditions in adults remains unknown. We present the case of a 34-year-old woman who had Turner syndrome.