Swan Neck Deformity

Figurative description of a deformation of the fingers, namely the configuration of a hyperextended proximal with a flexed distal interphalangeal joint (PIP and DIP). The corresponding condition in the thumb is called duck bill deformation (albeit with fewer joints)

Commonly found in rheumatoid diseases such as rheumatoid arthritis. The opposite of a swan neck is called a boutonnière deformity.


Swan neck deformity in a patient with rheumatoid arthritis.