•
Bone infection
• Diagnostic and therapeutic
challenge
– infectionist
– orthopaedic
– surgeon
– radiologist
• Staphylococcus
aureus, Mycobacterium tuberculosis
• Early
and specific diagnostic – best results MR – high
diagnostic accuracy (ca. 90%)
Osteomyelitis
Pathology - MRI
1. Medullar inflammation
•
edema
• leukocytes infiltration
•
purulent transformation
2. Abscess Brodie (chronic evolution)
3.
Infection spread to the cortical
•
periostitis
• soft-tissue
•
fistula
4. Sequestration
• chronic
form with overproduction of bone
Osteomyelitis
MRI Findings | 
Pubian
acute osteomyelitis, arthritis and pyomyositis |
• marrow signal
changes: hipo T1, hyper STIR, contrast enhanced (Se 98%, Sp 75%)
•
the morphologic appearance depending on:
– location,
–
mechanism,
– duration of infection
•
uncomplicated septic arthritis may cause signal intensity changes in
adjacent bone marrow (edema, hyperemia)
•
a variety of noninfectious diseases may exactly mimic the signal
changes and morphologic appearance of actively infected bone.
Erdman
WA. Radiology 1991.
Chronic osteomyelitis with bone
abscess. Arthritis. | 
|
Chronic
ostemyelitis, sinus tract
M,
35 y. Chronic ostoemyelitis after tibial spine fractures with bone
abscess and sinus tract.
November 4,
2009
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