Orthopaedics A lady having flexion at proximal interphalyngeal joint and hyperextension at distal interphalyngeal joint of index finger is called- A Boutonniere deformity B Swan neck deformity C Wind swept deformity D Z deformity 💡 Explanation A lady having flexion at proximal interphalyngeal joint and hyperextension at distal interphalyngeal joint of index finger is called- ✓ Correct Answer: A. Boutonniere deformity