<prompt> Boutonniere deformity involves:Flexion at PIP and DIP jointExtention at PIP and DIP jointFlexion at PIP and extention at DIP jointExtention at PIP and flexion at DIP joint  <response>: Boutonniere deformity involves: Flexion at PIP and extention at DIP joint seen in RA Other deformities in RA- Swan-neck deformity Z-deformity of thumb Ulnar detion of fingers 