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The diabetic foot: magnetic resonance imaging evaluation
J Beltran1, D S Campanini, C Knight
1Department of Radiology, Ohio State University Hospitals, Columbus 43210.
Abstract:
Fourteen diabetic patients with suspected foot infection and/or neuropathic joint (Charcot Joint) were evaluated with magnetic resonance imaging (MRI) in an attempt to assess the extent of the infection and also to distinguish infection from the changes seen with neuroarthropathy. The majority of patients with infection had more than one site of involvement and the following diagnoses were made by MRI evaluation: osteomyelitis (n = 8), abscess (n = 7), neuropathic joint (n = 5), septic arthritis (n = 4), and tenosynovitis (n = 4). Clinical or surgical/pathological confirmation of the MRI diagnoses was obtained in all but nine sites of infection or cases of neuropathic joint. If the two diagnostic categories of septic arthritis and tenosynovitis are excluded, all but four of the MRI diagnoses were confirmed. A distinctive pattern for neuroarthropathy was identified in five cases, consisting of low signal intensity on T1- and T2-weighted images within the bone marrow space adjacent to the involved joint. We conclude that MRI is a valuable adjunct in the evaluation of the diabetic foot, and that it provides accurate information regarding the presence and extent of infection in this subset of patients. MRI has proven particularly helpful in differentiating neuroarthropathy from osteomyelitis.
Insights
Magnetic resonance imaging (MRI) effectively evaluates diabetic foot infections and neuroarthropathy. This imaging technique accurately assesses infection extent and distinguishes it from Charcot Joint changes.
Area of Science:
- Radiology
- Diabetology
- Orthopedics
Background:
- Diabetic foot complications, including infection and Charcot Joint neuroarthropathy, pose significant diagnostic challenges.
- Accurate assessment of infection extent is crucial for effective treatment and limb salvage in diabetic patients.
Purpose of the Study:
- To evaluate the utility of magnetic resonance imaging (MRI) in assessing diabetic foot infections and differentiating them from neuroarthropathy.
- To determine the accuracy of MRI in diagnosing osteomyelitis, abscess, neuropathic joint, septic arthritis, and tenosynovitis in the diabetic foot.
Main Methods:
- Retrospective analysis of MRI scans from fourteen diabetic patients with suspected foot infection or Charcot Joint.
- Correlation of MRI findings with clinical, surgical, and pathological confirmations.
Main Results:
- MRI identified multiple sites of involvement in most infected patients.
- Diagnoses included osteomyelitis (8), abscess (7), neuropathic joint (5), septic arthritis (4), and tenosynovitis (4).
- A distinctive MRI pattern for neuroarthropathy (low signal intensity on T1/T2-weighted images) was observed.
Conclusions:
- MRI is a valuable tool for evaluating diabetic foot infections, providing accurate information on presence and extent.
- MRI aids in differentiating neuroarthropathy from osteomyelitis, improving diagnostic accuracy in complex diabetic foot cases.