Swan neck deformity is:
Deformities of RA - Swan Neck Deformity - Flexion at DIP and hypeension at PIP - Flexor insufficiency of PIP - Boutonniere deformity / Button hole deformity - Extensor deficiency at PIP joint - Hypeension of DIP & Flexion of PIP - Z deformity of thumb - Ulnar detion of fingers Z-deformity of thumb