Klippel–Feil Syndrome

a rare disease, characterized by the congenital fusion of any 2 of the 7 cervical vertebrae. Often associated with other neurological conditions.

Etiology:

It is caused by a failure in the normal segmentation or division of the cervical vertebrae during the early weeks of fetal development.

First described in 1912 by Maurice Klippel and André Feil, France.