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Interstitial Cystitis/Bladder Pain Syndrome as Referred Pain From Injured T12/L1 Nerves: Symptomatic Improvement With
Megan E Gornet1, Akash Chandawarkar2, Amin Herati3
1Department of Gynecology and Obstetrics, Johns Hopkins University, Baltimore, MD.
Objective:
To evaluate the specific contribution of ilioinguinal (II) and iliohypogastric (IH) nerve injury and referred pain to interstitial cystitis/bladder pain syndrome and patient-reported chronic pelvic pain, and to enumerate the effects of II and IH nerve resection on the pain and voiding symptoms in patients with IC/BPS.
Materials And Methods:
This was a prospective cohort study of 8 patients with ICS/BPS who had prior abdominal surgery. All patients received diagnostic image guided T12/L1 nerve blocks, followed by II and IH nerve resections. Validated O'Leary-Sant ICS symptom indices (OSPI) and pelvic pain and urgency/frequency patient symptoms scale (PUF) scores were collected at specified intervals pre- and post-operatively.
Results:
Median scores at pre-operative (OSPI 13.9, PUF 20.4) and 1 week time points (OSPI 5.9, PUF 11), as well as differences between pre-operative and 10 month time points (OSPI 3.7, PUF 6) were all statistically significant (P = .008 and .009 at 1 week, and .007 and .008 at 10 months, for OSPI and PUF respectively). The mean difference in score from pre-operative to longest follow-up as measured by the OSPI was -14.4 (P < .001) and by PUF -10.3 (P < .001). All time points registered demonstrated improvement in pain scores. There were no surgical complications or adverse events.
Conclusion:
II and IH nerve resection may be an effective and durable treatment option for those with prior abdominal surgery who have referred interstitial cystitis/bladder pain syndrome pain from these injured nerves.
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