CT features of recurrent lumbar disc herniation

Area of Science:

• Radiology
• Neurosurgery
• Spinal Imaging

Background:

• Recurrent lumbar disc herniation is a common complication after initial surgery.
• Distinguishing recurrent herniation from postoperative scar tissue can be challenging.
• Accurate diagnosis is crucial for appropriate patient management and surgical reintervention.

Purpose of the Study:

• To evaluate the reliability of computed tomography (CT) findings in diagnosing recurrent lumbar disc herniation.
• To differentiate recurrent disc herniation from postoperative scar tissue using CT density measurements.

Main Methods:

• Analysis of CT findings in 29 patients with reoperation-confirmed recurrent lumbar disc herniation.
• Assessment of lesion shape, density, and enhancement patterns on CT.
• Comparison of CT density values between recurrent herniation and postoperative scar.

Main Results:

• Recurrent herniations presented varied shapes (bulge, round, triangular) with densities consistent with disc material.
• Lesions did not enhance in the enhancement study conducted in six cases.
• CT density measurements effectively distinguished recurrent disc herniation from postoperative scar.

Conclusions:

• CT density measurement is a reliable method for differentiating recurrent lumbar disc herniation from postoperative scar.
• CT imaging provides valuable information for surgical planning in patients with suspected recurrent disc herniation.