Swan neck deformity is seen in
Impoant deformities of hand in RABoutonniere deformity: flexion contracture of PIP joint and extension of DIP jointSwan neck deformity: Hyperextension of PIP joint and flexion at DIP jointZ-deformity: radial detion of the wrist with ulnar detion of fingersHyperextension of 1st interphalangeal joint and flexion on MP joint(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 420)
Osteoahritis
Rheumatoid ahritis
Psoriatic ahritis
Gout
All India exam