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Granulomatous spinal infections: MR imaging
H S Sharif1, D C Clark, M Y Aabed
1Department of Radiology, Riyadh Armed Forces Hospital, Kingdom of Saudi Arabia.
Abstract:
The value of magnetic resonance (MR) imaging in evaluating granulomatous spinal infection was retrospectively assessed in 81 patients with proved disease; 27 were reexamined after administration of gadolinium diethylenetriaminepentaacetic acid, and 25 underwent follow-up studies. Blinded interpretations were correlated with clinical, microbiologic, and surgical findings. MR imaging enabled prediction of the presence of neurologic complications in 93% of patients and diagnosis of the type of infection in 94%, and correlated well with surgical findings in 24 of 27 patients. Vertebral intraosseous abscesses, meningeal involvement, subligamentous spread, and paraspinal abscess location were best identified on contrast-enhanced studies and were seen most frequently in tuberculous spondylitis. High signal intensity on T1-weighted images of previously affected vertebrae suggested healing and correlated well with symptoms. The authors conclude that MR imaging may be useful as the method of first choice for the initial assessment and posttherapy follow-up of patients with granulomatous spinal infection.
Insights
Magnetic resonance (MR) imaging effectively evaluates granulomatous spinal infections, predicting complications and infection types. Contrast-enhanced MR imaging is crucial for identifying abscesses and spread, aiding diagnosis and follow-up.
Area of Science:
- Radiology
- Infectious Diseases
- Spinal Imaging
Background:
- Granulomatous spinal infections pose diagnostic challenges.
- Accurate assessment is vital for effective treatment and patient outcomes.
Purpose of the Study:
- To evaluate the utility of magnetic resonance (MR) imaging in diagnosing and managing granulomatous spinal infections.
- To correlate MR imaging findings with clinical, microbiologic, and surgical data.
Main Methods:
- Retrospective analysis of 81 patients with confirmed granulomatous spinal infection.
- Inclusion of contrast-enhanced MR imaging (gadolinium diethylenetriaminepentaacetic acid) in 27 patients.
- Correlation of blinded MR interpretations with clinical, microbiologic, and surgical findings.
Main Results:
- MR imaging accurately predicted neurologic complications (93%) and infection type (94%).
- Contrast-enhanced studies identified vertebral abscesses, meningeal involvement, and paraspinal abscesses, particularly in tuberculous spondylitis.
- T1-weighted signal intensity suggested healing and correlated with symptoms.
Conclusions:
- MR imaging is a valuable tool for initial assessment and post-therapy follow-up of granulomatous spinal infections.
- It aids in predicting complications and identifying specific infection characteristics.
- Contrast-enhanced MR imaging enhances the detection of key pathological features.