SERONEGATIVE ARTHRITIS
CHARACTERISTIC FEATURES
      • enthesopathy with new bone formation at
      • ligament and tendon insertions
      • fluffy periosteal proliferation in the adjacent bones.
      • Micky mouse erosions
      • Ivory phalanx
      • Joint fusion
      • Subluxation and deformity
      • Nail changes
      • Arthritis mutilans
CHARACTERISTIC DISTRIBUTION
      • Psoriasis Hands DIPJ’s
      • Psoriasis Feet MTPJ’s
      • Can resemble RA
      • Sacroiliitis
      • Spondyloarthritis