Semin Musculoskelet Radiol 2011; 15(3): 257-268
DOI: 10.1055/s-0031-1278425
© Thieme Medical Publishers

MRI Evaluation of Bone Marrow Changes in the Diabetic Foot: A Practical Approach

Talya R. Toledano1 , Eliana A. Fatone2 , Adina Weis1 , Anne Cotten3 , Javier Beltran1
  • 1Department of Radiology, Maimonides Medical Center, Brooklyn, New York
  • 2Dipartimento di Scienze Cliniche e Bioimmagini, Sezione di Scienze Radiologiche, Università degli Studi G. D'Annunzio, Chieti, Italy
  • 3Service de Radiologie et d'Imagerie Musculosquelettique, Centre de Consultation d'Imagerie de l'Appareil Locomoteur, Lille, France
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Publication History

Publication Date:
03 June 2011 (online)

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ABSTRACT

One of the most important roles of magnetic resonance (MR) in imaging of the diabetic foot is to differentiate between the common and often comorbid pathologies that present with abnormal bone marrow signal. The primary diagnostic challenges in this setting are to distinguish osteomyelitis from reactive bone marrow edema, neuroarthropathy from osteomyelitis, and the sterile from the superinfected neuropathic joint. Whereas both osteomyelitis and reactive marrow edema share increased T2 signal, osteomyelitis is confirmed by T1 hypointensity in the bone marrow and reactive edema demonstrates isolated T2 signal hyperintensity. In distinguishing osteomyelitis from neuroarthropathy, a localized or contiguously spreading forefoot focus of abnormal bone marrow away from the subchondral surface and adjacent to a skin ulcer, cellulitis, abscess, or sinus tract would be indicative of osteomyelitis. A midfoot, subchondral, periarticular, or polyarticular distribution of findings in the absence of a contiguous focus of skin disruption would strongly support neuroarthropathy. Parameters that have been successfully correlated with acute infection superimposed on neuroarthropathy include diffuse bone marrow signal abnormality, progressive subarticular enhancement, loss of subchondral cysts, and the presence of the MRI “ghost sign.”

REFERENCES

Javier BeltranM.D. 

Department of Radiology, Maimonides Medical Center

4802 10th Ave., Brooklyn, NY 11219

Email: Jbeltran46@msn.com