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osteophytes, subchondral sclerosis, subchondral cysts, uneven loss of articular space; DIP, PIP, CMC, hip, knees, spine

DISH: Diffuse Idiopathic Skeletal Hyperostosis

Bulky flowing osteophytes of at least 4 contiguous vertebral bodies, preserved disk height, calcifications


Erosions, periarticular Osteoporosis, Soft Tissue Swelling, Uniform loss of articular space, MCP

RA: Purely Erosive, Fusiform ST Swelling, Periarticular Osteoporosis, Uniform cartilage destruction, Bilaterally Symmetric;
- Hand: MCP ulnar deviation, Boutonniere deformity - hyperextension of DIP, flexion of PIP; Swan-neck deformity - hyperextension of PIP, flexion of DIP; Hitchhikers thumb, Telescope fingers - shortening of phalanges due to dislocations; ulnar and radial styloid erosions; wrist instability - scapholunate dissociation
- Shoulder: Lysis of distal clavicle, Rotator Cuff tear, Marginal erosions of humeral head
- Hip: protrusio acetabuli