In which of the following deformities is the distal interphalangeal joint flexed and proximal interphalangeal joint extended?: (A) Boutonierre Deformity, (B) Swan neck deformity, (C) Z deformity, (D) Claw hand
Answer is B. Boutonniere 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 fingers(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 420)