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Irinel Oancea
Phoenix Diagnostic Clinic, Bucharest
• The most rapidly destructive joint disease
• Hematogeneous spread to synovium (rarely from osteomyelitis)
• Staphylococcus aureus, Streptococcus, Gram-negatives (diabetes)
• Loss of joint function in 25% - 50%
DL Goldenberg, Lancet 1998
• Definitive diagnostic – identification of agent in synovial fluid (aspiration)
Septic Arthritis - Role of MRI
– Early joint effusion
– Early cartilage damage
– Early bone marrow changes
– Extension of infection into surrounding tissues
– Dif tuberculous versus pyogenic arthritis
Septic Arthritis - MR Findings
• Joint effusion
• Synovial thickening
• Perisynovial edema
• Cartilage destruction
• Bone distruction
• Bursitis, tenosynovitis
Tuberculous versus pyogenic arthritis
MR Imaging
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SH Hong et al, Radiology 2001 – 29 TA, 13 PA
M, 47 y. Pyogenic arthristis of shoulder with staphycococcus aureus. Osteomyelitis.
| M, 57 y. Pyogenic arthritis of both hips (staphiloccoccus). |
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F, 67 y. Pyogenic arthritis and osteomyelitis of the knee after surgery |
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November 4, 2009
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