Limbic associated pelvic pain: a hypothesis to explain the diagnostic relationships and features of patients with chronic pelvic pain. Med Hypotheses. 2007;69:282-286. [PMID: 17292560 DOI: 10.1016/j.mehy.2006.12.025]

Sexual Function of Patients with Deep Endometriosis after Surgical Treatment: A Systematic Review

OBJECTIVE

 To review the current state of knowledge on the impact of the surgical treatment on the sexual function and dyspareunia of deep endometriosis patients.

DATA SOURCE

 A systematic review was conducted in accordance with the Meta-Analysis of Observational Studies in Epidemiology (MOOSE) guidelines. We conducted systematic searches in the PubMed, EMBASE, LILACS, and Web of Science databases from inception until December 2022. The eligibility criteria were studies including: preoperative and postoperative comparative analyses; patients with a diagnosis of deep endometriosis; and questionnaires to measure sexual quality of life.

STUDY SELECTION

 Two reviewers screened and reviewed 1,100 full-text articles to analyze sexual function after the surgical treatment for deep endometriosis. The risk of bias was assessed using the Newcastle-Ottawa scale for observational studies and the Cochrane Collaboration's tool for randomized controlled trials. The present study was registered at the International Prospective Register of Systematic Reviews (PROSPERO; registration CRD42021289742).

DATA COLLECTION

 General variables about the studies, the surgical technique, complementary treatments, and questionnaires were inserted in an Microsoft Excel 2010 (Microsoft Corp., Redmond, WA, United States) spreadsheet.

SYNTHESIS OF DATA

 We included 20 studies in which the videolaparoscopy technique was used for the excision of deep infiltrating endometriosis. A meta-analysis could not be performed due to the substantial heterogeneity among the studies. Classes III and IV of the revised American Fertility Society classification were predominant and multiple surgical techniques for the treatment of endometriosis were performed. Standardized and validated questionnaires were applied to evaluate sexual function.

CONCLUSION

 Laparoscopic surgery is a complex procedure that involves multiple organs, and it has been proved to be effective in improving sexual function and dyspareunia in women with deep infiltrating endometriosis.

Severe pelvic pain is associated with sexual abuse experienced during childhood and/or adolescence irrespective of the presence of endometriosis

STUDY QUESTION

Is endometriosis associated with childhood and/or adolescent sexual abuse?

SUMMARY ANSWER

Endometriosis is not associated with a history of sexual abuse, unlike the presence of severe pelvic pain.

WHAT IS KNOWN ALREADY

Several studies have highlighted a link between pelvic pain and sexual abuse during childhood/adolescence. Moreover, an inflammatory state has been described in patients with a history of childhood maltreatment. Given that inflammation and pelvic pain are two entities often encountered with endometriosis, several teams have investigated whether endometriosis is associated with abuse during childhood/adolescence. However, the results are conflicting, and the link between sexual abuse and the presence of endometriosis and/or pain is hard to disentangle.

STUDY DESIGN, SIZE, DURATION

A survey nested in a cohort study of women surgically explored for benign gynecological indications at our institution between January 2013 and January 2017. For each patient, a standardized questionnaire was completed during a face-to-face interview with the surgeon in the month preceding the surgery. Pelvic pain symptoms (dysmenorrhea, deep dyspareunia, non-cyclic chronic pelvic pain, and gastrointestinal or lower urinary tract symptoms) and their intensities were assessed with a 10 cm visual analog scale (VAS). Pain was considered to be severe when the VAS score was ≥7.

PARTICIPANTS/MATERIALS, SETTING, METHODS

A 52-question survey was sent in September of 2017 to evaluate abuses, especially sexual abuse during childhood and/or adolescence, and the psychological state during childhood and adolescence. The survey was structured to cover the following sections: (i) abuses and other life events during childhood and adolescence; (ii) puberty and body changes; (iii) onset of sexuality; and (iv) family relationships during childhood and adolescence. The patients were divided into groups according to whether or not they exhibited histologically proven endometriosis. Statistical analyses were conducted using univariate and multivariate logistic regression models.

MAIN RESULTS AND THE ROLE OF CHANCE

Two hundred and seventy-one patients answered all the questions of the survey: 168 with (endometriosis group) and 103 without endometriosis (control group). The mean ± SD overall population age was 32.2 ± 5.1 years. There were 136 (80.9%) and 48 (46.6%) women who experienced at least one severe pelvic pain symptom in the endometriosis and the control groups, respectively (P < 0.001). No differences were found between the two study groups regarding the following characteristics: (i) a history of sexual, physical, or emotional abuse; (ii) a history of abandonment or bereavement; (iii) the psychological state regarding puberty; and (iv) the family relationships. After multivariable analysis, we found no significant association between endometriosis and a history of sexual abuse during childhood and/or adolescence (P = 0.550). However, the presence of at least one severe pelvic pain symptom was independently associated with a history of sexual abuse (odds ratio = 3.6, 95% CI (1.2-10.4)).

LIMITATIONS, REASONS FOR CAUTION

Evaluation of the psychological state during childhood and/or adolescence can be subject to recall bias. In addition, selection bias is also a possibility given that some of the patients surveyed did not return the questionnaire.

WIDER IMPLICATIONS OF THE FINDINGS

Severe gynecological painful symptoms in women with or without histologically proven endometriosis may be linked to sexual abuse experienced during childhood and/or adolescence. Patient questioning about painful symptoms and abuses is important to provide comprehensive care to the patients, from a psychological to a somatic point of view.

STUDY FUNDING/COMPETING INTEREST(S)

No funding or competing interests.

TRIAL REGISTRATION NUMBER

N/A.

Women with Chronic Pelvic Pain Demonstrate Increased Lumbopelvic Muscle Stiffness Compared to Asymptomatic Controls

Background: Although lumbopelvic muscle stiffness is commonly clinically assessed in women with chronic pelvic pain (CPP), it has not been objectively quantified in this population, and its association with other pain-related impairments has not yet been established. Objective: To compare superficial lumbopelvic muscle stiffness in women with and without CPP. In addition, pressure pain threshold (PPT) was compared between groups and the associations between muscle stiffness and PPT were assessed in women with CPP. Study Design: Case-control. Methods: Muscle stiffness and PPT of 11 lumbopelvic muscles were assessed in 149 women with CPP and 48 asymptomatic women. Subjective outcome measures, including pelvic floor function, health history, and psychosocial outcomes, were collected before muscle stiffness and PPT measurements. Analysis of covariance was used to compare muscle stiffness differences between groups, and independent t-tests were used to compare PPT between groups. Associations between measurements of PPT and muscle stiffness were calculated using correlation analysis. Results: Five of the 11 muscles measured were significantly stiffer in women with CPP than those without CPP (p < 0.05). PPT was significantly decreased in all muscles measured in women with CPP; however, there was not a significant association between muscle stiffness and PPT in women with CPP. Conclusion: The study identified the abdominal lumbopelvic muscles that have increased stiffness in women with CPP compared to asymptomatic women. In addition, muscle stiffness and PPT are two distinct impairments within this population. The results suggest that women with CPP have peripheral muscle impairments, which may be addressed without intravaginal or intrarectal intervention. Clinical Trial Registration: NCT04851730.

Understanding the Female Physical Examination in Patients with Chronic Pelvic and Perineal Pain

(1) Background: The objective was to compare the exploration of chronic pelvic pain syndrome (CPPS) patients in different locations and establish the role of physical examination in CPPS patients. (2) Methods: We reviewed clinical data from 107 female patients with CPPS unresponsive to conventional therapies at Puerta de Hierro University Hospital Madrid, Spain, from May 2018 to June 2022. Patients were classified into three groups: (a) pelvic pain; (b) anorectal pain; or (c) vulvar/perineal pain. (3) Results: Although the demographics of patients with CPPS were different, their physical examinations were strikingly similar. Our study observed a comorbidity rate of 36% and 79% of central sensitization of pain. Seventy-one percent of patients had vulvar allodynia/hyperalgesia. Pain on examination was identified in any pelvic floor muscle, in any pelvic girdle structure, and neuropathic pain in 98%, 96%, and 89%, respectively. Patients with vulvar and perineal pain were more different from the other groups; these patients were younger and had fewer comorbidities and less central sensitization, less anorectal pain, more pain during intercourse, and greater nulliparity (p = 0.022; p = 0.040; p = 0.048; p = 0.000; p = 0.006; p = 0.005). (4) Conclusions: The findings of this study are related to the understanding of the pathophysiology of CPPS. The physical examination confirms the central sensitization of female patients with CPPS, helps us to determine the therapeutic management of the patient, and can be considered as a prognostic factor of the disease.

Examining vaginal and vulvar health and sexual dysfunction in patients with interstitial cystitis (UNICORN-1 study)

INTRODUCTION AND HYPOTHESIS

The Vaginal Health Index Score (VHIS) and vulvodynia swab tests are used to assess vaginal health and vulvodynia. However, few studies have used these tests in patients with interstitial cystitis/bladder pain syndrome (IC/BPS). IC/BPS is a chronic, debilitating disorder, characterised by urinary frequency, urinary urgency and pelvic pain. It adversely affects organs adjacent to the urinary system, leading to complications of sexual dysfunction. This study was aimed at understanding sexual dysfunction in patients with IC/BPS, as well as deterioration of vaginal health and vulvodynia.

METHODS

This study compared the vaginal health of IC/BPS patients with that of asymptomatic control individuals. The Pain Urgency Frequency (PUF) score, Female Sexual Function Index (FSFI), VHIS, and vulvodynia swab tests, were used as tools. The PUF and FSFI are questionnaire-based surveys of bladder symptoms and sexual function respectively. VHIS evaluation and vulvodynia swab tests are performed by physicians. The PUF was used to assess baseline IC/BPS symptoms to validate the patient population, and FSFI, vulvodynia swab tests and VHIS were used to determine between-group differences.

RESULTS

Thirty-seven patients were recruited in each group. The IC/BPS group had a higher PUF score (18.19±3.51 vs 3.56±2.35; p<0.05), worse total FSFI (15.72±4.46 vs 26.3±4.93; p<0.05), and worse vulvodynia swab test and total VHIS (11.59±2.87 vs 22.05±3.05; p<0.05) scores than those of the control group.

CONCLUSIONS

Asian women with IC/BPS experienced greater sexual dysfunction, worsened vaginal health and increased vulvodynia compared with control individuals. Information on vaginal and vulva health is very useful in evaluating IC/BPS patients.

Clinical diagnosis and treatment of functional anorectal pain

Functional anorectal pain (FARP) is a kind of nonorganic, idiopathic pain that occurs in the anus and/or rectum. The pathogenesis of FARP is very complex, and there is no unified conclusion in the academic world. This paper reviews the clinical diagnosis and treatment of FARP to provide a reference for clinicians.

"The Overactive Pelvic Floor (OPF) and Sexual Dysfunction" Part 1: Pathophysiology of OPF and Its Impact on the Sexual Response

INTRODUCTION

Overactive pelvic floor (OPF) muscles are defined as muscles that do not relax, or may even contract, when relaxation is needed, for example, during micturition or defecation. Conditions associated with OPF are multifactorial and include multiple possible etiologies and symptom complexes. The complex interplay between biological and psychosocial elements can lead to the persistence of OPF symptoms along with psychological and emotional distress.

OBJECTIVES

(1) To review and contextualize, from a pathophysiologic perspective, the evidence for OPF, (2) to provide an overview of common clinical presentations and comorbidities of OPF, and (3) to discuss the effect of OPF on sexual function in men and women.

METHODS

Review of the updated literature on the pathophysiology of OPF was carried out. OPF-associated conditions were overviewed, with special emphasis on the impact on sexual function in men and women.

RESULTS

Individuals with suspected OPF often present with a combination of gastrointestinal, gynecological, musculoskeletal, sexual, and urological comorbidities, mostly accompanied by psychoemotional distress. In both women and men, sexual function is significantly impaired by OPF and genitopelvic pain penetration disorders are often the primary manifestation of this condition. Women with OPF report less sexual desire, arousal, and satisfaction; more difficulty reaching orgasm; lower frequencies of intercourse; more negative attitudes toward sexuality; and more sexual distress than women without sexual pain. The most frequently reported sexual dysfunctions in men with OPF include erectile dysfunction, premature ejaculation, and ejaculatory pain.

CONCLUSION

The complex pathophysiology of OPF involving multisystemic comorbidities and psychosocial factors emphasize the importance of a biopsychosocial assessment for guiding effective and personalized management. Padoa A, McLean L, Morin M, et al. "The Overactive Pelvic Floor (OPF) and Sexual Dysfunction" Part 1: Pathophysiology of OPF and Its Impact on the Sexual Response. Sex Med 2021;9:64-75.

Extracorporeal shock wave therapy for treatment of vulvodynia: a prospective, randomized, double-blind, placebo-controlled study

BACKGROUND

Currently, there are no effective therapy strategies for idiopathic, non-organic vulvodynia in women. ESWT (extracorporeal shock wave therapy) is a nonsurgical/noninvasive technique widely used to treat musculoskeletal diseases, muscle spasticity and hypertonia, renal and biliary calculi and urological disorders.

AIM

We examined the effects of ESWT on vulvodynia in women.

DESIGN

A prospective, randomized, double-blind, placebo-controlled study was conducted between 2015 and 2018 following a feasibility study.

SETTING

Obstetrics and Gynecology Hospital departments.

POPULATION

The study included 62 women with vulvodynia for at least 3 months.

METHODS

The women were randomly assigned to either a treatment group (N.=31) or a placebo group (N.=31). The patients in the treatment group received perineally applied ESWT weekly (3000 pulses each for four consecutive weeks). The energy flux density was 0.25 mJ/mm2, frequency 4 Hz, focus zone 0-30 mm, therapeutic efficacy 0-90 mm, stand-off II. The device used was a standard electromagnetic shock wave unit with a focused shock wave handpiece. The position of the shock wave transducer was changed six times after every 500 pulses. Patients in the placebo group underwent the same treatment procedure, but the handpiece was provided with a placebo stand-off that disabled energy transmission. Subjective pain was self-evaluated by each patient using two tools before and after treatment: a 10 cm linear visual analogue scale (VAS, 0-10) and a cotton-swab test (CST, Goetsch scale 0-4). Follow-ups were done 1, 4, and 12 weeks post-ESWT.

RESULTS

In all, 61 women completed the study. We tested for differences in the VAS and CST within and between the treatment and placebo groups. The testing was between before treatment and particular follow-up. We found significant changes in the treatment group. Reductions in VAS (P<0.01) and CST (P<0.01) were observed at all three follow-ups. At all assessments, pain reduction was always >30%. In the placebo group there were no statistically significant changes between before and after treatment. There were no differences between the treatment and placebo groups before treatment but statistically significant differences at all three follow-ups (VAS P<0.01); CST P<0.01).

CONCLUSIONS

ESWT seems to reduce pain perception in our treatment group. Thus, we are encouraged to explore this technique further.

CLINICAL REHABILITATION IMPACT

The method is easily replicable, inexpensive, and without known side effects.

Altered Spontaneous Brain Activity in Patients with Classical Trigeminal Neuralgia Using Regional Homogeneity: A Resting-State Functional MRI Study

OBJECTIVE

Neuroimaging studies have shown that patients with pain-related conditions have altered neuronal activity and structural functions. The purpose of this study was to investigate whether patients with classical trigeminal neuralgia (CTN) exhibit changes in corresponding neuronal activity via analysis of neuronal activity regional homogeneity (ReHo).

METHODS

A total of 28 patients presenting with sore eyes (12 men and 16 women) were matched with 28 healthy controls (12 men and 16 women). All participants underwent functional magnetic resonance imaging (fMRI). This ReHo method was used to assess the consistency of changes in neural activity in various brain regions. The receiver operating characteristic (ROC) curve was applied to differentiate ReHo values of patients with CTN from ReHo values of healthy controls. Pearson's correlation analysis was applied to evaluate the correlation between ReHo values of different brain regions of patients with CTN and clinical manifestations.

RESULTS

Compared with healthy controls, patients with CTN were found to have increased ReHo values in the inferior cerebellum bilaterally, right inferior temporal gyrus, right middle occipital gyrus, right fusiform gyrus, right superior frontal gyrus, and right precentral gyrus. ROC curve analysis of each brain region revealed near-perfect accuracy regarding the area under the curve. However, no correlation between ReHo values and clinical manifestations in patients with CTN was found.

CONCLUSIONS

CTN is associated with altered neuronal networks in different areas of the brain. ReHo values all possess different degrees of change, implying that CTN has a certain impact on cerebral function.

Altered intrinsic brain activities in patients with acute eye pain using amplitude of low-frequency fluctuation: a resting-state fMRI study

OBJECTIVE

Many previous studies have reported that pain symptoms can lead to significant brain function and anatomical changes, whereas the intrinsic brain activity changes in acute eye pain (EP) patients remain unknown. Using the amplitude of low-frequency fluctuation (ALFF) method, this study aimed to evaluate the spontaneous brain activity alterations and their relationships with clinical features in acute EP patients.

PARTICIPANTS AND METHODS

A total of 20 patients with EP (15 males and 5 females) and 20 healthy controls (HCs; 15 males and 5 females) closely matched in age, sex, and education underwent resting-state functional magnetic resonance imaging scans. The ALFF method was applied to assess spontaneous brain activity changes. The ALFF values of the EP patients were distinguished from those of the HCs using a receiver operating characteristic curve. Pearson's correlation analysis was used to investigate the relationships between the mean ALFF signal values from many brain regions and the clinical features in EP patients.

RESULTS

Compared with the HCs, acute EP patients had significantly lower ALFF in the left and right precentral/postcentral gyrus and left precuneus. In contrast, acute EP patients showed higher ALFF values in the right and left parahippocampal gyri and left caudate. However, no relationship was observed between the mean ALFF signal values from the different areas and clinical manifestations in the acute EP patients.

CONCLUSION

We demonstrated that acute EP patients showed abnormal intrinsic brain activities in the precentral/postcentral gyrus and limbic system, which might provide useful information for explaining neural mechanisms in EP patients.

Sensory mapping of pelvic dermatomes in women with interstitial cystitis/bladder pain syndrome

AIM

To describe a sensory map of pelvic dermatomes in women with Interstitial Cystitis/Bladder Pain Syndrome (IC/BPS). We hypothesized that if IC/BPS involves changes in central processing, then women with IC/BPS will exhibit sensory abnormalities in neurologic pelvic dermatomes.

METHODS

Women with IC/BPS and healthy controls underwent neurologic examination that included evaluation of sharp pain sensitivity and vibration in dermatomes T12, L1, L2, S1-5. Peripheral nervous system sensitivity to pressure, vibration, and pinprick were scored using numeric rating scales (NRS). Bilateral comparisons were made with Wilcoxon signed-rank test and comparisons between groups were made by the Mann-Whitney U-test.

RESULTS

Total of 74 women with IC/BPS and 36 healthy counterparts were included. IC/BPS and control groups had similar age (43.0 ± 14.1 and 38.6 ± 15.3 years, P = 0.14) and BMI (28.9 ± 8.0 kg/m² and 26.9 ± 8.4 kg/m² , P = 0.24), respectively. Women with IC/BPS reported hyperalgesia (elevated bilateral NRS pain intensity) in all pelvic dermatomes compared to healthy controls. S4-S5 region had the highest pain intensity in all participants. All IC/BPS participants exhibited vibration sensation hypoesthesia, at least unilaterally, in all of the pelvic dermatomes except L1 compared to healthy controls.

CONCLUSION

This detailed map of neurologic pelvic dermatomes in women with IC/BPS found hyperalgesia in all pelvic dermatomes, and some evidence of vibration sensation hypoesthesia, compared to healthy controls. These findings support the hypothesis that IC/BPS may involve changes in central signal processing biased towards nociception.

Sexual function in endometriosis patients and their partners: effect of the disease and consequences of treatment

BACKGROUND

Sexual function is an important aspect of health and quality of life and is influenced by both medical conditions and health-care interventions, especially when gynecologic disorders are involved. Coital pain is among the main factors that affect sexual functioning, and this symptom is reported by almost half of women suffering from endometriosis. However, sexuality is a complex phenomenon driven by social, psychological and biological/hormonal factors and the presence of endometriosis might further affect domains of sexual function and the quality of a sexual relationship.

OBJECTIVE AND RATIONALE

The objective of this report is to review the current state of knowledge on the impact that endometriosis and its treatments have on the sexual function of women and their sexual partners.

SEARCH METHODS

A systematic literature search was performed to identify studies evaluating sexual function in endometriosis patients, and a narrative analysis of results is presented. The review discusses relevant quantitative and qualitative studies analyzing the effect of endometriosis and its hormonal and surgical treatments on measures of sexual function and quality of sexual relationship.

OUTCOMES

Endometriosis negatively affects different domains of sexual function, and the presence of dyspareunia is not the only determinant of sexual health in these women. Chronic pelvic pain, advanced stages of disease and the presence of physical and mental comorbidities affect sexual function, as well as personality traits and women's expectations. Although a number of studies have evaluated the effect of surgery and hormonal treatment on deep dyspareunia, overall sexual function and quality of the relationship with the partner are often under-investigated.

WIDER IMPLICATIONS

Multiple clinical and personal determinants affect sexual function in women with endometriosis, with potentially negative consequences on the sexual function of partners and quality of the relationship. Additional prospective and longitudinal investigations are warranted using specific instruments to analyze biopsychosocial variables of sexual pain in endometriosis patients and the effects that actual treatments have on measures of quality of sexual function and relationship.

Long-term assessment of effectiveness and quality of life of OnabotulinumtoxinA injections in provoked vestibulodynia

BACKGROUND

Provoked vestibulodynia is a relatively common condition that affects sexual activity. Multidisciplinary care is indicated and OnabotulinumtoxinA injections are safe and effective treatment in this indication.

AIMS

To assess the long-term efficacy of OnabotulinumtoxinA in provoked vestibulodynia.

MATERIALS AND METHODS

Twenty-one patients treated with OnabotulinumtoxinA injections (50U in each bulbospongiosus muscle) 24 months prior to the study were included. Data on pain [assessed using a visual analogue scale (VAS)], quality of life [measured by the Dermatology Life Quality Index (DLQI)] and quality of sex life [assessed using the Female Sexual Function Index (FSFI)] were collected before treatment, and 3 and 24 months after injection.

RESULTS

Nineteen patients participated in the study and 37% had no pain after 24 months. Significant improvements were noted in the VAS, DLQI and FSFI scores between baseline and 24 months post treatment (P < 0.0001). After 24 months, 18 patients (95%) were able to have sexual intercourse. This study was open and non-controlled.

DISCUSSION AND CONCLUSION

100U OnabotulinumtoxinA injections constitute an effective treatment in provoked vestibulodynia with results maintained after 2 years. They significantly improve pain, and have a positive impact on patient quality of life and sex life. Beneficial effects continue in the long-term, allowing patients to resume sexual activity.

Classifying Patients with Chronic Pelvic Pain into Levels of Biopsychosocial Dysfunction Using Latent Class Modeling of Patient Reported Outcome Measures

Chronic pelvic pain affects multiple aspects of a patient's physical, social, and emotional functioning. Latent class analysis (LCA) of Patient Reported Outcome Measures Information System (PROMIS) domains has the potential to improve clinical insight into these patients' pain. Based on the 11 PROMIS domains applied to n=613 patients referred for evaluation in a chronic pelvic pain specialty center, exploratory factor analysis (EFA) was used to identify unidimensional superdomains. Latent profile analysis (LPA) was performed to identify the number of homogeneous classes present and to further define the pain classification system. The EFA combined the 11 PROMIS domains into four unidimensional superdomains of biopsychosocial dysfunction: Pain, Negative Affect, Fatigue, and Social Function. Based on multiple fit criteria, a latent class model revealed four distinct classes of CPP: No dysfunction (3.2%); Low Dysfunction (17.8%); Moderate Dysfunction (53.2%); and High Dysfunction (25.8%). This study is the first description of a novel approach to the complex disease process such as chronic pelvic pain and was validated by demographic, medical, and psychosocial variables. In addition to an essentially normal class, three classes of increasing biopsychosocial dysfunction were identified. The LCA approach has the potential for application to other complex multifactorial disease processes.

MRI suggests increased tonicity of the levator ani in women with interstitial cystitis/bladder pain syndrome

INTRODUCTION AND HYPOTHESIS

In interstitial cystitis/bladder pain syndrome (IC/BPS), pelvic floor dysfunction may contribute significantly to pelvic pain. To determine if pelvic floor hypertonicity manifests alterations on magnetic resonance imaging (MRI) in patients with IC/BPS, we retrospectively compared pelvic measurements between patients and controls.

METHODS

Fifteen women with IC/BPS and 15 age-matched controls underwent pelvic MRI. Two blinded radiologists measured the pelvic musculature, including the H- and M lines, vaginal length, urethral length and cross-sectional area, levator width and length, and posterior puborectalis angle. MRI measures and clinical factors, such as age, parity, and duration of symptoms, were compared using a paired, two-tailed t test.

RESULTS

There were no significant differences in age, parity, or symptom duration between groups. Patients with IC/BPS exhibited shorter levator muscles (right: 5.0 ± 0.7 vs. 5.6 ± 0.8, left: 5.0 ± 0.8 vs. 5.7 ± 0.8 cm, P < 0.002) and a wider posterior puborectalis angle (35.0 ± 8.6 vs. 26.7 ± 7.9°, P < 0.01) compared with controls. The H line was shorter in patients with IC/BPS (7.8 ± 0.8 vs. 8.6 ± 0.9 cm, P < 0.02), while M line did not differ. Total urethral length was similar, but vaginal cuff and bladder neck distances to the H line were longer in patients with IC/BPS (5.7 ± 0.6 vs. 5.1 ± 0.9 cm, P < 0.02; 1.9 ± 0.4 vs. 1.4 ± 0.2 cm, P < 0.001, respectively).

CONCLUSIONS

Patients with IC/BPS have pelvic floor hypertonicity on MRI, which manifests as shortened levator, increased posterior puborectalis angles, and decreased puborectal distances. We identified evidence of pelvic floor hypertonicity in patients with IC/BPS, which may contribute to or amplify pelvic pain. Future studies are necessary to determine the MRI utility in understanding pelvic floor hypertonicity in patients with IC/BPS.

The neurobiology of pain perception in normal and persistent pain

SUMMARY 

Pain is a significant national burden in terms of patient suffering, expenditure and lost productivity. Understanding pain is fundamental to improving evaluation, treatment and innovation in the management of acute and persistent pain syndromes. Pain perception begins in the periphery, and then ascends in several tracts, relaying at different levels. Pain signals arrive in the thalamus and midbrain structures which form the pain neuromatrix, a constantly shifting set of networks and connections that determine conscious perception. Several cortical regions become active simultaneously during pain perception; activity in the cortical pain matrix evolves over time to produce a complex pain perception network. Dysfunction at any level has the potential to produce unregulated, persistent pain.

Investigation of central nervous system dysfunction in chronic pelvic pain using magnetic resonance spectroscopy and noninvasive brain stimulation

BACKGROUND

Recent studies demonstrate that chronic pelvic pain is associated with altered afferent sensory input resulting in maladaptive changes in the neural circuitry of pain. To better understand the central changes associated with chronic pelvic pain, we investigated the contributions of critical pain-related neural circuits using single-voxel proton magnetic resonance spectroscopy (MRS) and transcranial direct current stimulation (tDCS).

METHODS

We measured concentrations of neural metabolites in 4 regions of interest (thalamus, anterior cingulate cortex, primary motor, and occipital cortex [control]) at baseline and after 10 days of active or sham tDCS in patients with chronic pelvic pain. We then compared our results to those observed in healthy controls, matched by age and gender.

RESULTS

We observed a significant increase in pain thresholds after active tDCS compared with sham conditions. There was a correlation between metabolite concentrations at baseline and quantitative sensory assessments. Chronic pelvic pain patients had significantly lower levels of NAA/Cr in the primary motor cortex compared with healthy patients.

CONCLUSIONS

tDCS increases pain thresholds in patients with chronic pelvic pain. Biochemical changes in pain-related neural circuits are associated with pain levels as measured by objective pain testing. These findings support the further investigation of targeted cortical neuromodulatory interventions for chronic pelvic pain.

History of abuse and its relationship to pain experience and depression in women with chronic pelvic pain

OBJECTIVE

We sought to determine the relationship among a history of physical or sexual abuse, pain experience, and depressive symptoms among women with chronic pelvic pain (CPP).

STUDY DESIGN

This was a cross-sectional study of women who presented to a tertiary referral center for evaluation of CPP (N = 273). All participants completed standardized questionnaires to assess a history of physical or sexual abuse, pain severity, pain disability, and depressive symptoms. Subjects were grouped by abuse category and compared to CPP participants without history of abuse. Multinomial logistic regression models were used to determine the association between adolescent or adult and childhood physical or sexual abuse with pain intensity, pain-related disability, and depressive symptoms.

RESULTS

Logistic regression analyses indicated that, after controlling for age and education, none of the abuse categories was associated with pain severity. However, adolescent or adult sexual abuse predicted greater pain-related disability (odds ratio, 2.39; 95% confidence interval, 1.05-5.40), while both adolescent or adult physical and sexual abuse were associated with higher levels of depression (both P < .05). Level of education was significantly associated with pain intensity, pain disability, and depression.

CONCLUSION

For our sample of women with CPP, a history of abuse during childhood or adulthood was not associated with differences in pain intensity, but adolescent or adult sexual abuse was associated with greater pain-related disability. A history of physical abuse or sexual abuse appears to hold a stronger relationship with current depressive symptoms than pain experience for women with CPP. Educational achievement holds a robust relationship with pain morbidity and depression for this population.

Treatment of chronic anorectal pain by acupuncture

Chronic anorectal pain is a common functional anorectal disease. Currently, there are still some difficulties in diagnosing and treating this disease. Acupuncture has advantages in treating chronic anorectal pain. This article will summarize the progress in treatment of chronic anorectal pain by acupuncture.

[Update on the diagnosis and treatment of vulvodynia]

CONTEXT

Vulvodynia is a complex and multifactorial clinical condition. It is defined as chronic vulvar discomfort characterized by burning, stinging or irritation. Its diagnostic difficulty and treatment is known.

OBJECTIVES

To review the medical literature of the last 10 years from a critical point of view.

EVIDENCE ACQUISITION

A search was made in Medline/Pubmed and the Cochrane Library using the terms vulvodynia and vestibulodynia to which etiology, epidemiology, diagnosis, neurophysiological test and treatment or management, were added.

EVIDENCE SYNTHESIS

In spite of the advances achieved in all of the aspects of vulvodynia, the methodology used at present in many cases does not have the desirable statistical soundness: there are few control or placebo-controlled groups and double-blind studies. Uniformity is lacking in the scales, indexes and questionnaires for the correct evaluation of pain before and after the treatment and debatable diagnostic criteria are use. The limited use of neurophysiological diagnostic resources that validate the clinical findings has been observed in the studies analyzed. In most of the works, the medical treatments have been shown to be ineffective. Physiotherapy and cognitive-behavioral therapy seem to be promising therapeutic tools. Surgery (vestibulectomy) stands out by its demonstrated efficacy in the publications studied.

CONCLUSIONS

A multidisciplinary approach is always necessary. Topical medical, psychological and physical therapy treatments may have sum effects and become an alternative to surgery. New pathways of research and more regulated studies are required.

Dysautonomia in autism spectrum disorder: case reports of a family with review of the literature

Case histories of a mother and her two children are reported. The mother was a recovered alcoholic. She and her two children, both of whom had symptoms that are typical of autistic spectrum disorder, had dysautonomia. All had intermittently abnormal erythrocyte transketolase studies indicating abnormal thiamine pyrophosphate homeostasis. Both children had unusual concentrations of urinary arsenic. All had symptomatic improvement with diet restriction and supplementary vitamin therapy but quickly relapsed after ingestion of sugar, milk, or wheat. The stress of a heavy metal burden, superimposed on existing genetic or epigenetic risk factors, may be important in the etiology of autism spectrum disorder when in combination. Dysautonomia has been associated with several diseases, including autism, without a common etiology. It is hypothesized that oxidative stress results in loss of cellular energy and causes retardation of hard wiring of the brain in infancy, affecting limbic system control of the autonomic nervous system.

Phantom headache: pain-memory-emotion hypothesis for chronic daily headache?

The neurobiology of chronic pain, including chronic daily headache (CDH) is not completely understood. “Pain memory” hypothesis is one of the mechanisms for phantom limb pain. We reviewed the literature to delineate a relation of “pain memory” for the development of CDH. There is a direct relation of pain to memory. Patients with poor memory have less chance to develop “pain memory”, hence less possibility to develop chronic pain. Progressive memory impairment may lead to decline in headache prevalence. A similar relation of pain is also noted with emotional or psychiatric symptoms. Literature review suggests that there is marked overlap in the neural network of pain to that of memory and emotions. We speculate that pain, memory, and emotions are interrelated in triangular pattern, and each of these three is related to other two in bidirectional pattern, i.e., stimulation of one of these will stimulate other symptoms/networks and vice versa (triangular theory for chronic pain). Longstanding or recurrent noxious stimuli will strengthen this interrelation, and this may be responsible for chronicity of pain. Reduction of both chronic pain and psychological symptoms by cognitive behavioral therapy or psychological interventions further suggests a bidirectional interrelation between pain and emotion. Longitudinal studies are warranted on the prevalence of headache and other painful conditions in patients with progressive memory impairment to delineate the relation of pain to memory. Interrelation of headache to emotional symptoms should also be explored.

The relationship between sexual abuse and interstitial cystitis/painful bladder syndrome

Interstitial cystitis/painful bladder syndrome (IC/PBS) is a chronic syndrome characterized by irritative voiding symptoms and pelvic pain or discomfort. IC/PBS represents localized bladder pathophysiologic changes and central nervous system upregulation. Patients exhibit bladder hyperalgesia and allodynia. Childhood sexual abuse occurs in up to 27% of females in the United States. Adults with a prior history of abuse or traumatization demonstrate hypothalamic-pituitary-adrenal (HPA) axis abnormalities, similar to IC/PBS patients. Childhood sexual abuse and physical traumatization are associated with subsequent lifelong risks of chronic pain syndromes. IC/PBS patients have increased rates of sexual abuse or physical traumatization histories compared with controls. IC/PBS patients with abuse histories tend to have greater pain intensity and lesser irritative voiding symptoms compared with nonabused IC/PBS patients. This article reviews the relationship between sexual abuse, HPA axis abnormalities, IC/PBS pathophysiology, and the role of sexual abuse on subsequent IC/PBS.

Neural control of the lower urinary tract: peripheral and spinal mechanisms

This review deals with individual components regulating the neural control of the urinary bladder. This article will focus on factors and processes involved in the two modes of operation of the bladder: storage and elimination. Topics included in this review include: (1) The urothelium and its roles in sensor and transducer functions including interactions with other cell types within the bladder wall ("sensory web"), (2) The location and properties of bladder afferents including factors involved in regulating afferent sensitization, (3) The neural control of the pelvic floor muscle and pharmacology of urethral and anal sphincters (focusing on monoamine pathways), (4) Efferent pathways to the urinary bladder, and (5) Abnormalities in bladder function including mechanisms underlying comorbid disorders associated with bladder pain syndrome and incontinence.

Current perspectives in vulvodynia

Vulvodynia, or chronic vulvar pain, is a common but poorly understood condition. Although its etiology is not well understood, it appears to be multifactorial. As such, treatment options are targeted to reduce singular symptoms in a piecemeal fashion. A number of randomized, controlled trials have been conducted and at least one paper on combination therapy has been published; however, further systematic research is needed in order to more fully inform clinical practice.

A preliminary study of transcranial direct current stimulation for the treatment of refractory chronic pelvic pain

BACKGROUND

The modulatory effects of transcranial direct current stimulation (tDCS) appear beneficial for different chronic pain syndromes; however, it is unclear whether this method can be used to treat refractory chronic pelvic pain.

OBJECTIVE

The objective of this preliminary study was to determine the efficacy and safety of tDCS for the management of refractory chronic pelvic pain.

METHODS

Seven patients with chronic pelvic pain having failed standard medical or surgical therapy underwent a crossover, double-blind sham controlled tDCS treatment protocol consisting of 1 mA applied for 20 minutes on two consecutive days with 2 weeks of follow-up symptom recording. Symptoms were recorded using multiple scoring systems, including visual analog scales for different pains, as well as organ-specific symptom scales. Comparison between active and sham treatment was performed by using paired t tests.

RESULTS

Overall and pelvic pain scores were significantly lower after active compared with sham treatment, as were disability and traumatic stress scores. No patient discontinued the study because of side effects, which were infrequent.

CONCLUSIONS

Active tDCS treatment induces a modest pain reduction in refractory chronic pelvic pain patients as compared with sham tDCS treatment. These results can guide the design and implementation of further studies investigating this method of neuromodulation for the treatment of refractory chronic pelvic pain.

Differences in the clinical presentation of interstitial cystitis/painful bladder syndrome in patients with or without sexual abuse history

PURPOSE

We tested the hypothesis that female patients with interstitial cystitis/painful bladder syndrome with or without a history of prior sexual abuse have different clinical presentations.

MATERIALS AND METHODS

Consecutive newly diagnosed women with interstitial cystitis/painful bladder syndrome were stratified into those with and those without a history of sexual abuse, and cohorts were compared. Analysis included demographics, frequency, nocturia, voided volumes, pelvic pain urgency frequency, interstitial cystitis symptom index and problem index scores, female sexual function index scores and physical examination findings.

RESULTS

There were 119 subjects, 30 (25%) with a history of sexual abuse. Comparing subjects with or without a history of sexual abuse, mean daytime frequency (minutes between voids) was 106 vs 60 (p <0.0001), nocturic episodes was 1.4 vs 3.1 (p = 0.0002) and voided volume was 234 vs 115 cc (p <0.001), respectively. On examination tenderness was more likely elicited on suprapubis, vulva, posterior vaginal wall, cervical motion, levators and rectum (p <0.05) in subjects with a history of sexual abuse. Female sexual function index domain scores were worse for all domains (p <0.05) for subjects with a history of sexual abuse. Age, duration of symptoms, pelvic pain urgency frequency, interstitial cystitis symptom index, interstitial cystitis problem index and hydrodistention volumes were similar.

CONCLUSIONS

Female patients with interstitial cystitis/painful bladder syndrome with a history of sexual abuse have a different clinical presentation compared to those without an abuse history. Patients with a history of abuse present with more pain and fewer voiding problems. Patients with interstitial cystitis/painful bladder syndrome with a sexual abuse history may have increased central sensitization.

Insight into urogynecologic features of women with interstitial cystitis/painful bladder syndrome

OBJECTIVE

The prevalence of interstitial cystitis/painful bladder syndrome (IC/PBS) among gynecologic patients attending vulvar disease or pelvic pain clinics is higher than expected. The evaluation of gynecologic characteristics in patients with IC/PBS could be important to delineate a better therapeutic strategy.

METHODS

We compared clinical gynecologic characteristics including localized and generalized vulvodynia and sexual activity of 47 women with a definite diagnosis of IC/PBS versus 47 negative controls.

RESULTS

The prevalence of both generalized or localized vulvodynia was 85.1% (40 of 47) in the patients and 6.4% (3 of 47) in the control group (p<0.0001 by Fisher exact test). The mean visual analogue score on generalized or localized vulvodynia evaluated with the cotton swab test was 6.1+/-2.6 (SD) among women with IC/PBS and 0.6+/-1.7 in the control group (p<0.0001 with Mann-Whitney U test). Pain during intercourse was described as unbearable by 15 women with IC/PBS (31.9%) and 2 controls (4.3%; p=0.001 by Fisher exact test). Sexual function was significantly impaired in women with IC as measured by the median total score of the Female Sexual Function Index in comparison with controls (13.8 vs. 28.7; p<0.0001).

CONCLUSIONS

Patients with a definite diagnosis of IC/PBS appear to have a high risk of vulvodynia with the associated negative implications for sexual activity. The establishment of a multidisciplinary approach with the involvement of the gynecologist appears to be a logical requisite for a correct treatment strategy for these patients.