Orthopedics Book

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Osteomyelitis MRI

Aka: Osteomyelitis MRI, MRI in Suspected Osteomyelitis
  1. Indications
    1. First-line test in Osteomyelitis after a non-diagnostic Osteomyelitis XRay
  2. Efficacy
    1. Best Test Sensitivity and Specificity for Osteomyelitis (except in region of surgical hardware)
      1. Only PET Scan has higher efficacy, but it is very expensive
    2. Test Sensitivity: 99% (82-100% in Diabetic Foot Osteomyelitis)
    3. Test Specificity: 81% (75-96% in Diabetic Foot Osteomyelitis)
      1. False positives with Osteoarthropathy and in regions of surgical hardware
  3. Advantages
    1. Defines infection boundaries including anatomic landmarks
    2. Best distinguishes soft tissue infection from bone infection
    3. Distinguishes Cellulitis from Osteomyelitis
    4. Can detect Osteomyelitis within 3-5 days of onset
  4. References
    1. Kapoor (2007) Arch Intern Med 167:125-32 [PubMed]
    2. Pineda (2006) Infect Dis Clin North Am 20:789-825 [PubMed]
    3. Termaat (2005) J Bone Joint Surg Am 87: 2464-71 [PubMed]

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