Repair of Delayed Meningeal Cyst after Spinal Surgery with Paraspinal Muscle Flap under Microscope.

BACKGROUND

Delayed meningeal cyst (DMC) is a rare complication after spinal surgery that is often ignored by clinicians, and its in-depth research is infrequent. In particular, no consensus has been reached about its surgical treatment. We found that patients with a DMC failed after conservative treatment, epidural blood patch, subarachnoid drainage, and initial attempts to eliminate the meningeal cyst. Therefore, we introduce the application of a paraspinal muscle flap repair under a microscope for the treatment of DMC.

METHODS

In this study, 13 patients who were repaired by a paraspinal muscle flap under a microscope for DMC from January 2007 to January 2017 were retrospectively reviewed. Their ages were 18-68 years old (mean age 48.7 years). The course of the disease ranged from 3 weeks to 28 months after the operation for the primary disease, with an average of 10.6 months. Length >5 cm was called a large DMC and length >8 was called a giant DMC. By analyzing the effect of surgical treatment, we summarized the treatment experience of DMC and evaluated the risk factors for the formation of DMC.

RESULTS

All patients were treated with paraspinal muscle flap repair under a microscope, and they healed well after the operation. There was no cerebrospinal fluid leakage or other operation-related complication. The mean follow-up was 16.5 months. Reexamination of the spine MRI showed no recurrence of the DMC.

CONCLUSIONS

The application of paraspinal muscle flap under a microscope combined with glue, bedrest, and CSF drain, was an effective option for the patients with DMC.