Klippel-Feil syndrome is a rare congenital disease of the bones. It is characterized by fusion of two or more cervical vertebrae. This condition may be associated with short, webbed neck with limited to no mobility. Reference: https://www.chop.edu/conditions-diseases/klippel-feil-syndrome#:~:text=Klippel%2DFeil%20syndrome%20is%20a Image via: https://www.heighpubs.org/jccm/jccm-aid1050.php