Extremely Large Amount of Fused Segments in a Rare Case of Klippel-Feil Syndrome.

Klippel-Feil Syndrome (KFS) is a complex, congenital condition, originally described by Maurice Klippel and Andre Feil in 1912.1 It is characterized by congenital fusion of two or more cervical vertebrae. Because of the abnormal fusion process and altered spinal biomechanics with undue motion at the non-fused cervical segment, adjacent to fused segments, such individuals are predisposed to abnormal cervical spine degeneration that could lead to canal stenosis at the level of a non-fused cervical segment, resulting later in undesirable instability and potential injury to neural elements.2,3 We present a rare case of multiple vertebrae fusions of cervical segment, thoracic segment and lumbar segment with multiple level vertebral canal stenosis in a patient with KFS.