• 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
| 
|
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). |  |
F,
67 y. Pyogenic arthritis and osteomyelitis of the knee after surgery |  |
November 4,
2009
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