Definition:
'Swan neck deformity' is a deformed position of the finger, in which the joint closest to the fingertip is permanently bent toward the palm while the nearest joint to the palm is bent away from it (Interphalangeal articulations of hand hyperflexion with proximal interphalangeal joint hyperextension). It is commonly caused by injury or inflammatory conditions like rheumatoid arthritis or sometimes familial (congenital, like Ehlers-Danlos syndrome ).
