Impact of Treatment of Pudendal Neuralgia on Pain: A Systematic Review and Meta-Analysis

Abstract

Introduction and hypothesis: Pudendal neuralgia is chronic pelvic pain associated with the pudendal nerve. Unfortunately, the best treatment approach is unknown. Our objective was to systematically assess interventions for pudendal neuralgia for improvement in pain.

Methods: Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses, we retrieved studies from MEDLINE, EMBASE, and clinicaltrials.gov through May 27, 2024. Our population included patients with pudendal neuralgia. Our interventions included surgery (decompression and nerve stimulation), injections and pulse radiofrequency treatments. Outcomes included improvement in pain (usually on a visual analog scale (VAS)) and adverse events. GRADE criteria were used to assess quality. Differences between pre- and post-intervention pain scores were compared with a random effects REML model and reported as mean difference and 95% confidence intervals.

Results: Six hundred eighty-seven abstracts were screened yielding 37 studies that met eligibility criteria. Treatments included 16 surgeries with 12 nerve decompressions and 4 nerve stimulator placements, 14 injections, and 7 pulse radiofrequency treatments. The majority, 95%, were Grade C. All treatments appear to provide relief to a similar extent (mean difference in VAS of 2.73 cm (1.77, 3.69), p < 0.07, with high heterogeneity I² = 98.18%), but no treatment was clearly superior for pain relief. Adverse events were inconsistently reported but more severe in the surgery group.

Conclusions: There are many treatment approaches to pudendal neuralgia, but overall, the evidence includes heterogeneous patient populations, non-standardized treatments, poor-quality studies, variable pain measurement instruments, and short-term follow-up. All interventions improved pain with no statistically significant difference between groups.

Keywords: Injection; Nantes criteria; Nerve block; Nerve decompression; Pain; Pudendal neuralgia; Pulse radiofrequency; Treatment; VAS score.