Spinal epidural abscess: correlation between MRI findings and outcome

Area of Science:

• Radiology
• Neurology
• Infectious Disease

Background:

• Spinal epidural abscess (SEA) is a serious condition requiring prompt diagnosis and management.
• Predicting clinical outcomes in SEA patients can be challenging.
• Magnetic Resonance Imaging (MRI) is crucial for diagnosing SEA.

Purpose of the Study:

• To investigate the association between specific MRI findings at diagnosis and clinical outcomes in patients with SEA.
• To identify MRI features that predict neurological deficits and functional recovery.
• To explore the potential for an MRI-based grading system for outcome prediction.

Main Methods:

• Retrospective review of clinical records and MRI studies for 18 patients diagnosed with SEA.
• Evaluation of contrast-enhanced MRI findings, including spinal canal narrowing, enhancement patterns, and abscess characteristics.
• Correlation of MRI findings with clinical outcomes such as weakness, pain, and functional recovery via univariate analysis.

Main Results:

• Significant associations were found between MRI findings and clinical outcomes.
• Spinal canal narrowing (≥50%), peripheral contrast enhancement, and abnormal spinal cord signal intensity correlated with follow-up weakness.
• Abscess length (>3 cm) and spinal canal narrowing were linked to persistent pain and incomplete functional recovery.

Conclusions:

• Specific contrast-enhanced MRI findings in spinal epidural abscess are predictive of clinical outcomes.
• Spinal canal narrowing, abscess length, and enhancement patterns are key indicators for predicting weakness, pain, and recovery.
• An MRI-based grading system incorporating these factors could improve prognostication for SEA patients.