Klippel-Feil Syndrome Home>Conditions_and_Diseases>Musculoskeletal_Disorders>Congenital_Anomalies>Klippel-Feil Syndrome     Web Pages Klippel-Feil Syndrome Circle of Friends Klippel-Feil syndrome is a rare, congenital disorder that affects the spine. The Circle of Friends is a group of people who have been affected in some way by KFS. We offer information and support. The KFS Connection Information, Support and Links. Kassandra's Page Learn about Klippel Feil Syndrome and Sprengels Syndrome. Klippel Feil Syndrome Information sheet compiled by the National Institute of Neurological Disorders and Stroke (NINDS).