Klippel-Feil syndrome

Klippel-Feil syndrome (KFS) is a congenital anomaly characterized by a defect in the formation or segmentation of the cervical vertebrae, resulting in a fused appearance. The clinical triad consists of short neck, low posterior hairline, and limited neck movement, although less than 50% of patients demonstrate all 3 clinical features (Tracy et al., 2004). Genetic Heterogeneity of Klippel-Feil Syndrome Additional forms of KFS include autosomal recessive KFS2 (214300), caused by mutation in the MEOX1 gene (600147) on chromosome 17q21, autosomal dominant KFS3 (613702), caused by mutation in the GDF3 gene (606522) on chromosome 12p13, and autosomal recessive KFS4 (616549), caused by mutation in the MYO18B gene (607295) on chromosome 22q12. See also MURCS association (601076), in which Klippel-Feil anomaly is associated with urogenital anomalies. [from OMIM]