Psoriatic arthritis
Psoriasis plaque: legs
Keratoderma blennorrhagica in a patient with reactive arthritis
Erythema nodosum on the shin of a patient
Wrist radiograph from a patient with chronic calcium pyrophosphate arthritis showing severe degenerative changes
Image of intracellular calcium pyrophosphate crystals under compensated polarizing light microscopy
Chronic tophaceous gout showing nodules in periarticular structures and arthritis
Gonococcal arthritis of the hand, which caused the hand and wrist to swell
Cutaneous infarcts
Janeway lesions
Osler node
Erythema migrans
Typical erythematous "slapped cheeks" of erythema infectiosum
Lacy, reticular, erythematous eruption of erythema infectiosum on an upper extremity
Macular erythematous patches (Gottron papules) over the toes with dystrophic cuticles
Hand demonstrating sclerodactyly with finger curling, shiny skin at the fingers, and telangiectasias
Digital pits without ulcers
Hands demonstrating Raynaud phenomenon
Late-stage sclerodactyly with contractures due to severe skin tightening
Diffuse hyperemia or erythroderma during the acute phase of chikungunya virus infection
Diffuse morbilliform rash during the acute phase of chikungunya virus infection
Plain radiograph showing bilateral sacroiliitis in a patient with ankylosing spondylitis
Features of spondyloarthropathies
Discriminating features in polyarthritis
Bilateral hilar adenopathy
Knee radiograph with linear calcific deposits of cartilage calcification
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