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Microdenervation of the Spermatic Cord for Chronic Scrotal Content Pain: Single Institution Review Analyzing Success Rate After Prior Attempts at Surgical Correction

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Microdenervation of the Spermatic Cord for Chronic Scrotal Content Pain: Single Institution Review Analyzing Success Rate After Prior Attempts at Surgical Correction Microdenervation of the Spermatic Cord for Chronic Scrotal Content Pain: Single Institution Review Analyzing Success Rate After Prior Attempts at Surgical Correction Stephen M. Larsen,*,† Jonas S. Benson† and Laurence A. Levine‡ From the Department of Urology, Rush University Medical Center, Chicago, Illinois Abbreviations Purpose: Microdenervation of the spermatic cord is an effective treatment for and Acronyms men with intractable scrotal content pain. We evaluated a single center experi- CT ϭ computerized tomography ence, analyzing patients in whom prior surgical attempts had failed to correct pain who subsequently underwent microdenervation of the spermatic cord. MDSC ϭ microdenervation of the Materials and Methods: A retrospective chart review of 68 patients who under- spermatic cord went microdenervation of the spermatic cord from 2006 to 2010 was performed. ϭ MRI magnetic resonance Prior ipsilateral surgical procedures with the intent to correct scrotal content imaging pain were selected, identifying 31 testicular units. ϭ VAS visual analog scale Results: Chart review was performed on 68 men with mean age of 42 years at presentation and a mean followup of 10 months. Patients in whom prior surgical Accepted for publication August 21, 2012. correction had failed and who subsequently had microdenervation of the sper- * Correspondence: Department of Urology, Rush University Medical Center, Chicago, Illinois matic cord had a mean postoperative pain score of 3 (range 0 to 10) with an 60612 (telephone: 773-550-7309; FAX: 312-942- average decrease in pain of 67%. Those who had not undergone a prior attempt 4005; e-mail: [email protected]). at surgical correction had a mean post-microdenervation of the spermatic cord † Nothing to disclose. ‡ Financial interest and/or other relationship pain score of 2 (range 0 to 10) and an average pain decrease of 79% which did not with Lilly USA LLC, Auxilium Pharmaceuticals differ statistically from those in whom prior surgery failed. In addition, 50% of Inc., Coloplast Corp., American Medical Systems, men who had undergone surgery before microdenervation of the spermatic cord Astellas, Abbott and USPhysioMed. had complete relief of pain after microdenervation of the spermatic cord vs 64% See Editorial on page 415. of those who had not undergone previous surgery. Conclusions: Men with chronic scrotal content pain in whom prior attempts to Editor’s Note: This article is the fifth of 5 published in this issue correct pain have failed have similar, albeit lower, success rates as those without for which category 1 CME credits prior surgical intervention. Therefore, men with chronic scrotal content pain in can be earned. Instructions for whom prior surgical management has failed and who have a positive spermatic obtaining credits are given with cord block should be considered candidates for microdenervation of the spermatic the questions on pages 780 and cord. 781. Key Words: spermatic cord, testis, pain, denervation CHRONIC orchialgia is a well de- is not derived solely from the testi- scribed urological manifestation of a cle, but also the epididymis and/or chronic pain syndrome defined as spermatic cord. Chronic scrotal con- unilateral or bilateral testicular tent pain is a debilitating condition pain that is constant or intermittent which can inhibit one’s ability to and has lasted for more than 3 perform activities of daily living in- months.1 Chronic scrotal content cluding work, and physical and sex- pain may be a more accurate de- ual activity. For the practicing scription of this condition as it does urologist it can pose a significant not exclude pain in the scrotum that challenge to manage and treat. 0022-5347/13/1892-0554/0 http://dx.doi.org/10.1016/j.juro.2012.09.026 ® 554 www.jurology.com THE JOURNAL OF UROLOGY Vol. 189, 554-558, February 2013 © 2013 by AMERICAN UROLOGICAL ASSOCIATION EDUCATION AND RESEARCH,INC. Printed in U.S.A. MICRODENERVATION OF SPERMATIC CORD FOR CHRONIC SCROTAL CONTENT PAIN 555 Chronic pain is a complex process which is to 2010. Patients who underwent prior ipsilateral sur- poorly understood, and thought to be secondary to gical procedures with the intent to correct chronic scro- an inciting noxious stimulus which leads to the tal content pain were selected and 31 testicular units process of sensitization and plasticity of the pe- were identified. Long-term followup was conducted by ripheral and central nervous systems, allowing for office visit or chart review and telephone interview. Perceived etiology of pain was recorded, and included up-regulation of pain pathways.2,3 This up-regu- previous surgery (vasectomy, inguinal hernia repair, lation ultimately can lead to a spontaneous firing varicocelectomy) and acute trauma. Conservative ther- of nerves such that no noxious stimuli are neces- apy had failed in all men. Many patients in this study 4 sary to generate the pain impulse. Chronic scro- were referred to our institution after evaluation and tal content pain is believed to develop from numer- treatment at a specialized pain clinic. A standard eval- ous direct sources, including previous trauma; uation protocol was performed on all patients including pelvic, inguinal or scrotal surgery; after infection; a detailed medical history with a focus on previous after torsion; referred pain from the hip or spine; genital infection, spinal surgery, local trauma, analge- diabetic neuropathy; and after vasectomy, and it sic use, history of sexual abuse, psychiatric disorders is most commonly idiopathic.5,6 In fact, up to 43% and other chronic pain conditions (eg fibromyalgia, of patients with chronic scrotal content pain have chronic pelvic pain, chronic prostatitis, interstitial cys- titis) which may suggest a more global pain syndrome. been reported to have no identifiable cause for 1,7 A focused physical examination was performed to iden- their symptoms. Conservative treatment is rec- tify the precise location of the pain (ie testicle, sper- ommended before more invasive therapeutic mo- matic cord structures and/or epididymis). Urinalysis dalities such as surgical correction. and semen culture were performed when there were Before presenting to a urologist, patients may signs of infection. Duplex scrotal ultrasound was per- have already sought out and experienced failure of formed at least once in all patients to exclude structural multiple previous conservative treatments8 in- abnormality including tumor, torsion, varicocele, hydro- cluding analgesics, anti-inflammatory agents, an- cele, spermatocele, inguinal hernia and epididymo-or- tidepressants, anticonvulsants, physical therapy, chitis. CT or MRI of the spine or hip was performed biofeedback and acupuncture. In addition, many pa- when a history of back pain or trauma was reported. tients are referred to a pain clinic where medical Figure 1 provides a detailed depiction of our algorithm therapy and local and regional blocks are adminis- for the evaluation of chronic scrotal content pain. Conservative therapies had been tried and had failed in tered, and psychotherapy is offered to help cope all patients by the time they were evaluated at our clinic, with the pain. In some cases chronic scrotal content and in 31 men prior surgical treatment of their pain had pain may be attributed to an easily identifiable ab- failed. Figure 2 depicts the treatment algorithm used at normal physical finding such as varicocele, hydro- our institution. When no reversible cause was identified, cele, spermatocele, hernia or obstruction after pre- spermatic cord block was performed at the pubic tubercle vious vasectomy. In these circumstances surgical area with 20 ml 0.25% bupivacaine. Pain scores were correction for chronic scrotal content pain typically recorded before and after the administration of local an- aims at correcting these findings via varicocelec- esthetic, and were quantified using the short form McGill 12 tomy, hydrocelectomy, spermatocelectomy, hernior- pain score VAS. Patients who demonstrated a positive rhaphy, open ended vasectomy or vasovasostomy, response, defined as greater than 50% temporary reduc- respectively. In the absence of a reversible cause, tion of pain following cord block, were considered candi- dates for MDSC. microdenervation of the spermatic cord has been The microdenervation procedure was performed in an reported as an effective durable testis sparing sur- outpatient setting with the patient under general anes- gery, emerging as a clear alternative to orchiectomy thesia with the assistance of an operating microscope. The for the treatment of chronic orchialgia refractory to spermatic cord is exposed at the external inguinal ring 7,9–11 medical management. It has not yet been re- through an inguinal incision and the ilioinguinal nerve is ported whether MDSC is an effective treatment for divided as it emerges from the ring. The cord is isolated patients in whom previous attempts at surgical cor- and supported by a Penrose drain, and the operating mi- rection of chronic scrotal content pain have failed. croscope at 8ϫ power is brought to the field. The anterior We reviewed our results from 2006 to 2010 for pa- cremasteric fascia is then incised and the cord structures tients who underwent MDSC at our institution, and are identified during careful dissection. Arteries are iso- compared the efficacy of MDSC in patients who have lated with the assistance of intraoperative micro-Doppler had prior attempts at surgical correction for pain vs and carefully stripped of all fibroareolar tissue for 1 to 2 cm. All
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