A systematic comparative outcome analysis of surgical versus percutaneous techniques in the management of symptomatic sacral perineural (Tarlov) cysts: a meta-analysis

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OBJECTIVE

Symptomatic perineural or Tarlov cysts (TCs) are a rare cause of chronic low-back pain. Given the rarity of the disease, there is no literature consensus regarding the optimal management of these cysts.

METHODS

The authors conducted a systematic comparative outcome analysis of symptomatic TCs treated with surgery (group A, 32 studies, n = 333) or percutaneous interventions (group B, 6 studies, n = 417) analyzing the demographic characteristics, baseline characteristics of the cysts, clinical presentations, types of interventions, complication rates, and the recurrence rate in both treatment groups. The literature search was performed using the PubMed, MEDLINE, Cochrane, and Ovid databases up to 2018. The MeSH search terms used were “Tarlov cyst,” “sacral perineural cyst,” “sacral nerve root cyst,” “meningeal cyst of the sacral spine,” “extra meningeal cyst with spinal nerve root fibers,” “spinal extradural arachnoid pouch,” and “cyst of the sacral nerve root sheath.” The authors used statistical tests for two proportions using the “N-1” chi-square test with the free version of MedCalc for Windows for comparison among the groups.

RESULTS

Overall symptomatic improvement was reported in 83.5% of patients in both groups; however, exacerbation of preprocedural symptoms was significantly higher in group B than group A (10.1% vs 3.3%, p = 0.0003). The overall complication rates in the surgical and nonsurgical groups were 21% and 12.47%, respectively. Transient sciatica was the most common complication in both groups (17% vs 8%, respectively; p = 0.017). The incidence of cyst recurrence was much lower in group A than group B (8% vs 20%, p = 0.0018). The mean follow-up duration for the surgical group was 38 ± 29 months (25 studies, n = 279), while that for the nonsurgical group was 15 ± 12 months (4 studies, n = 290) (p < 0.0001).

CONCLUSIONS

The authors noted that although the surgical interventions were associated with higher postprocedural complication rates, long-term efficacy and success in terms of cyst resolution were superior following surgery compared to percutaneous procedures in the management of symptomatic TCs. There was no difference in symptom recurrence with either of the techniques.

ABBREVIATIONS LP = lumboperitoneal; SSS = spinal subarachnoid space; TC = Tarlov cyst.

Article Information

Correspondence Maxwell Boakye: University of Louisville, School of Medicine, Louisville, KY. maxwell.boakye@ulp.org.

INCLUDE WHEN CITING Published online February 8, 2019; DOI: 10.3171/2018.10.SPINE18952.

Disclosures The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper.

© AANS, except where prohibited by US copyright law.

Headings

Figures

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    PRISMA flowchart showing inclusion and exclusion criteria used in the meta-analysis. Figure is available in color online only.

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    Forest plots showing the estimates of cyst recurrence and complications following surgery (blue) compared with percutaneous techniques (red). *Statistically significant. Figure is available in color online only.

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