Clinical efficacy and safety of nerve-sparing radical hysterectomy for cervical cancer: a systematic review and meta-analysis

Comparative evaluation of reproductive organ-preserving versus standard radical cystectomy in female: a meta-analysis and systematic review of perioperative, oncological, and functional outcomes

BACKGROUND

To evaluate the perioperative, oncological, and functional outcomes of reproductive organ-preserving radical cystectomy (ROPRC) compared to standard radical cystectomy (SRC) in the treatment of female bladder cancer.

METHODS

A systematic search was conducted in November 2023 across several scientific databases. We executed a systematic review and cumulative meta-analysis of the primary outcomes of interest, adhering to the PRISMA and AMSTAR guidelines. The study was registered in PROSPERO (CRD42024501522).

RESULTS

The meta-analysis included 10 studies with a total of 2015 participants. ROPRC showed a significant reduction in operative time and postoperative fasting period compared to SRC (MD - 45.69, 95% CI - 78.91 ~ - 12.47, p = 0.007, and MD - 0.69, 95% CI - 1.25 ~ - 0.13, p = 0.02, respectively). Functional outcomes, both daytime continence rate (OR 4.94, 95% CI 1.53 ~ 15.91, p = 0.008) and nighttime continence rate (OR 5.91, 95% CI 1.94 ~ 18.01, p = 0.002), and sexual function measured by the Female Sexual Function Index (MD 5.72, 95% CI 0.19 ~ 11.26, p = 0.04), were significantly improved in the ROPRC group. There were no significant differences between ROPRC and SRC in terms of estimated blood loss, length of hospital stay, overall postoperative complications, minor complications or major complications. Oncologically, both procedures showed comparable outcomes with no significant differences in positive surgical margins, tumor recurrence rates, overall survival, cancer-specific survival, recurrence-free survival, or progression-free survival.

CONCLUSIONS

ROPRC is a viable and effective alternative to SRC in female bladder cancer patients, offering enhanced functional outcomes and similar oncological safety. These findings suggest that ROPRC can improve the quality of life in female bladder cancer patients without compromising the efficacy of cancer treatment.

Comparison of surgical outcomes between robot-assisted and conventional laparoscopic nerve-sparing modified radical hysterectomy for deep endometriosis

PURPOSE

Drug resistance and severe pelvic pain often warrant surgical intervention for treating deep endometriosis (DE); however, damage to the autonomic nervous system can occur because of anatomical considerations. We aimed to investigate the advantages of robotic technology in enabling precise dissection, even in DE.

METHODS

We retrospectively compared the surgical outcomes of robot-assisted (RA) and conventional laparoscopic (CL) nerve-sparing modified radical hysterectomies (NSmRHs) for DE.

RESULTS

Between the two groups (RA-NSmRH group, n = 50; CL-NSmRH group, n = 18), no differences were identified based on patient demographics, such as age, body mass index, previous surgery, revised American Society of Reproductive Medicine classification, Enzian classification, uterine weight, number of removed DE lesions, and concomitant procedures. All patients in both groups achieved complete removal of the DE lesions with complete bilateral pelvic autonomic nerve preservation. The mean operative time (OT) was significantly longer (130 ± 46 vs. 98 ± 22 min, p < 0.01), and estimated blood loss (EBL) was lower (35 ± 44 vs. 131 ± 49 ml, p < 0.01) in the RA-NSmRH group than in the CL-NSmRH group. The hospitalization days (4.3 ± 1.3 vs. 4.1 ± 0.2 days, p = 0.45) and perioperative complications with Clavien-Dindo classification ≥ grade III (0% vs. 0%) were not significant in both the groups. None of the patients required self-catheterization after surgery.

CONCLUSION

Compared with CL-NSmRH, RA-NSmRH was associated with longer OT and lower EBL, whereas the number of hospitalization days and complications were similar in both groups. Our results imply that nerve-sparing surgery can be safely and reproducibly performed using conventional or robotic laparoscopic modalities to treat DE.

Perineural Invasion in Cervical Cancer: A Hidden Trail for Metastasis

Perineural invasion (PNI), the neoplastic invasion of nerves, is an often overlooked pathological phenomenon in cervical cancer that is associated with poor clinical outcomes. The occurrence of PNI in cervical cancer patients has limited the promotion of Type C1 surgery. Preoperative prediction of the PNI can help identify suitable patients for Type C1 surgery. However, there is a lack of appropriate preoperative diagnostic methods for PNI, and its pathogenesis remains largely unknown. Here, we dissect the neural innervation of the cervix, analyze the molecular mechanisms underlying the occurrence of PNI, and explore suitable preoperative diagnostic methods for PNI to advance the identification and treatment of this ominous cancer phenotype.

Endometriosis Resection Using Nerve Sparing Versus Non-nerve Sparing Surgical Techniques

Introduction

Endometriosis is the condition in which there are ectopic endometrial tissues outside the uterine cavity. The use of nerve sparing technique has been well established in the field of oncology, leading to better quality of life following radical oncologic procedures without compromising on the long-term survival. The objective of this study is to compare the quality of life in terms of sexual function and urinary function in women undergoing nerve sparing surgeries for endometriosis and those undergoing non-nerve sparing surgeries.

Material and Methods

Data of 51 patients operated for endometriosis at Galaxy Care Laparoscopic Institute, Pune, India between 1st January 2020 till 31st December 2020 were collected and analysed. We included patients in age group between 38 and 44 years in monogamous relationship, with moderate to severe endometriosis (Revised American Society of Reproductive Medicine r-ASRM score of 16 and above 5), being operated for hysterectomy along with ureterolysis and/or bowel resection (including shaving of rectal endometriosis, discoid resection, segmental resection), and excision of large ovarian endometriomas (> 3 cm size) with cul-de-sac obliteration.

Results

The patients were evaluated for the following factors: age, parity, nature of surgery done, immediate intraoperative complications (bowel injury, bladder injury, ureteric injury), operative time in minutes, average blood loss, length of hospital stay, days to removal of foley's catheter and postoperative urinary and sexual function which were assessed on follow up visit and a 1-year follow up interview. We found that the urinary and sexual function in the group undergoing nerve sparing surgeries was significantly better than the patients undergoing non-nerve sparing surgeries.

Conclusion

Laparoscopic nerve sparing approach for clearance of endometriosis has allowed better quality of life post surgery. Proper understanding and demonstration of pelvic neuroanatomy has made this approach feasible and achievable in carefully selected patients.

Postsurgical urodynamic study of total laparoscopic nerve-sparing radical hysterectomy for uterine cervical cancer

AIM

To evaluate the impact on urodynamic results between the laparoscopic nerve-sparing radical hysterectomy (LRH) following a step-by-step procedure and abdominal nerve-sparing radical hysterectomy (ARH) for patients with uterine cervical cancer.

METHODS

This retrospective study enrolled 76 patients with cervical cancer: 35 in the LRH group and 41 in the ARH group. We analyzed their postoperative bladder function in a urodynamics study and examined the volume of resected pelvic nerves contained in parametrial sections using S-100 antibody staining.

RESULTS

Estimated blood loss and hospital stay after operation for the LRH group were significantly better than those in the ARH group (p < 0.0001). As well, the number of harvested lymph nodes was significantly higher in the LRH group (p = 0.044). There was no difference in perioperative complications between the two groups in this study. The 5-year disease-free survival rates and overall survival rates were 91.2% and 94.0% in the LRH group and 87.8% and 95.1% in the ARH group, both respectively. Although the median residual urine volume were no statistical differences between the LRH group and the ARH group, the recovery of postoperative bladder function (uroflowmetry) in the LRH group rapidly reached presurgery levels at 1 month, and the LRH group had a smaller number of s-100 antibody stained nerves contained the parametrial sections.

CONCLUSION

We demonstrated that LRH following a step-by-step procedure could achieve a higher level of prevention of damage to the bladder branch of the pelvic splanchnic nerve plexus and thus restore bladder function more rapidly.

Impact of timing of urinary catheter removal on voiding dysfunction after radical hysterectomy for early cervical cancer

OBJECTIVES

To evaluate whether the timing of postoperative urinary catheter removal is associated with voiding dysfunction after radical hysterectomy for early cervical cancer within contemporary surgical practice.

METHODS

We performed an institutional retrospective cohort study of patients who underwent Piver type II-III open or minimally invasive radical hysterectomy for early-stage cervical cancer (International Federation of Gynecology and Obstetrics (FIGO) 2009 stage IA1 with lymphovascular invasion to stage IIA) between January 2006 and December 2019. We compared voiding dysfunction (inability to spontaneously void with a post-void residual <100 mL after catheter removal) and outcomes based on postoperative timing of urinary catheter removal using univariate and multivariate logistic regressions.

RESULTS

Among 234 patients, 86 (36.8%) underwent open surgery and 112 (47.9%) used enhanced recovery after surgery (ERAS) pathways. 29 (12.4%) patients had urinary catheter removal between 1-5 days postoperatively (group 1), 141 (60.3%) between 6-10 days (group 2), and 64 (27.3%) between 11-15 days (group 3). The overall rate of voiding dysfunction was 11.5%, with no difference between group 1 (17.2%), group 2 (11.3%), and group 3 (9.4%) (p=0.54). Group 1 had a significantly shorter time from surgery to spontaneous voiding (4 days, IQR 3-5 days) compared with group 2 (8 days, IQR 7-10 days) and group 3 (13 days, IQR 11-15 days) (p<0.01). There was no difference in hospital length of stay, urinary tract infection, or re-admission due to a genitourinary complication within 60 days of surgery based on timing of catheter removal. On multivariate analysis, the odds of voiding dysfunction did not differ by tumor size, type of hysterectomy, cancer stage, surgical approach, ERAS timeframe, or timing of catheter removal group.

CONCLUSION

There was no difference in voiding dysfunction or postoperative genitourinary complications based on timing of urinary catheter removal after radical hysterectomy. Early catheter removal should be considered in this population.

Sexuality and quality of life after nerve-sparing radical hysterectomy for cervical cancer: A prospective study

OBJECTIVE

Nerve-sparing radical hysterectomy (NSRH) decreases the negative postoperative consequences of radical surgery for cervical cancer, such as bladder evacuation disorders, colorectal motility disorders, and sexual dysfunction. The aim of this study was to prospectively assess the sexuality and quality of life in a group of women who underwent NSRH with lymphadenectomy for cervical cancer.

MATERIALS AND METHODS

A total of 65 patients with early-stage cervical cancer underwent NSRH between 2014 and 2016. Patient examinations and questionnaire surveys (Female Sexual Function Index questionnaire and European Organization for Research and Treatment of Cancer questionnaires QLQ-C30 and QLQ-CX24) were conducted, before and one year after the surgery.

RESULTS

After the exclusion of 19 sexually inactive women and 10 women who received adjuvant anticancer treatment, 36 sexually active patients treated solely with nerve-sparing surgery were eligible for evaluation. The mean age was 47 years. The average preoperative vaginal length was 9.4 cm, whereas the postoperative length was shortened to 7.1 cm. This study showed no negative impact of NSRH on sexual desire, arousal, satisfaction, orgasm, pain, sexual activity, sexual enjoyment, and sexual worry. The worsening of sexual functioning was recorded during the one-year follow-up. The QLQ-C30 questionnaire confirmed postoperative improvement in global health status and role, emotional, and social functioning.

CONCLUSION

Our study showed using standardized questionnaires that NSRH has no negative impact on sexual desire, arousal, satisfaction, orgasm, pain, sexual activity, frequency of sexual intercourse, sexual enjoyment, and sexual worry, while only the worsening of sexual functioning was recorded. Moreover, NSRH did not cause postoperative deterioration in the quality of life parameters.

Sexual, bladder and bowel function following different minimally invasive techniques of radical hysterectomy in patients with early-stage cervical cancer

Purpose

Despite the establishment of radical surgery for therapy of cervical cancer, data on quality of life and patient-reported outcomes are scarce. The aim of this retrospective cohort study was to evaluate bladder, bowel and sexual function in women who underwent minimally invasive surgery for early-stage cervical cancer.

Methods

From 2007–2013, 261 women underwent laparoscopically assisted radical vaginal hysterectomy (LARVH = 45), vaginally assisted laparoscopic or robotic radical hysterectomy (VALRRH = 61) or laparoscopic total mesometrial resection (TMMR = 25) and 131 of them completed the validated German version of the Australian Pelvic Floor Questionnaire (PFQ). Results were compared with controls recruited from gynecological clinics (n = 24) and with urogynecological patients (n = 63).

Results

Groups were similar regarding age, BMI and parity. The TMMR group had significantly shorter median follow-up (16 months versus 70 and 36 months). Postoperatively, deterioration of bladder function was reported by 70%, 57% and 44% in the LARVH, VARRVH and TMMR groups, respectively (p = 0.734). Bowel function was significantly worse after TMMR with a higher deterioration rate in 72 versus 43% (LARVH) and 47% (VARRVH) with a correspondingly higher bowel dysfunction score of 2.9 versus 1.5 and 1.8, respectively and 1.8 in urogynaecological patients. Sexual dysfunction was common in all surgical groups. 38% considered their vagina too short which was significantly associated with deep dyspareunia.

Compared with controls, surgical groups had significantly increased PFQ scores.

Conclusion

Pelvic floor dysfunction commonly deteriorates and negatively impacts on quality of life after minimally invasive radical hysterectomy, especially bowel function after TMMR. Pelvic floor symptoms should routinely be addressed pre- and postoperatively.

Validation of the FIGO 2018 staging system of cervical cancer: Retrospective analysis of FIGO 2009 stage IB1 cervical cancer with tumor under 2 cm

AIM

The International Federation of Gynecology and Obstetrics (FIGO) revised the cervical cancer staging system in 2018. This study aims to validate the revised staging system in patients with tumors <2 cm in size who were classified as FIGO 2009 stage IB1.

METHODS

We evaluated 62 women with stage IB1 cervical cancer (FIGO 2009) who underwent radical hysterectomy as the initial treatment between November 2004 and August 2018 in our institution. The patients with FIGO 2009 stage IB1 and tumors <2 cm in size were enrolled. We reclassified their stage according to the FIGO 2018 staging system and analyzed their clinicopathological data retrospectively.

RESULTS

Twenty-five patients met the inclusion criteria. According to the FIGO 2018 classification, 9 (36.0%) patients were classified as stage IA, 13 (52.0%) as stage IB1, and 3 (12.0%) as stage IIIC, respectively. One (11.1%), six (46.2%), and three (100%) patients with lymphovascular space invasion were classified as stage IA, IB1, and IIIC, respectively. No significant differences were found in the 5-year overall survival or progression-free survival among the three stages.

CONCLUSIONS

As many as 36.0% of patients classified as FIGO 2009 stage IB1 with a tumor <2 cm in size were classified as stage IA in the FIGO 2018 classification. For these cases, a treatment less invasive than radical hysterectomy or radiotherapy might be sufficient. Our results suggest that cervical cancer patients with tumors <2 cm should be carefully diagnosed by performing cervical conization and assessed the pathological findings before hysterectomy.

Tailoring parametrectomy for early cervical cancer (Stage IA-IIA FIGO): a review on surgical, oncologic outcome and sexual function

INTRODUCTION

Cervical cancer is currently one of the most common cancers afflicting the female population worldwide and in industrialized countries the presence of screening and a specific diagnostic and therapeutic process has favored early diagnosis of cervical cancer. In literature have found that reducing the radicality on the parametria in early cervical cancer (ECC), reduces complications without impacting oncological outcomes, but the data in the literature are not yet clear.

EVIDENCE ACQUISITION

Searching on PubMed, we included 1473 articles from January 1974 to 2020. We identified all the studies that compared different type of radical hysterectomy in the primary surgical treatment of ECC. 16 articles were elected for the review.

EVIDENCE SYNTHESIS

Modified radical hysterectomy (Piver II/Querleu-Morrow Type B) in ECC, if compared to CRH (Piver III/Querleu-Morrow Type C2), is not associated with worse cancer outcome and patient survival, but it is associated with a minor operating time, lower blood loss and minor bladder dysfunction. Nerve sparing radical hysterectomy approach (NSRH/Querleu-Morrow Type C1) compared to CRH (Piver III/Type C2) in the ECC, with our data we can confirm a non-inferiority regarding the oncological outcome.

CONCLUSIONS

Reduced radicality on the parametrium offers positive effects on the quality of life (sexual life and bladder function) of patients without impacting on survival, oncological outcome.

Total laparoscopic vs. conventional open abdominal nerve-sparing radical hysterectomy: clinical, surgical, oncological and functional outcomes in 301 patients with cervical cancer

Objective

Total laparoscopic nerve-sparing radical hysterectomy (TL-NSRH) has been considered a promising approach, however, surgical, clinical, oncological and functional outcomes have not been systematically addressed. We present a large retrospective multi-center experience comparing TL-NSRH vs. open abdominal NSRH (OA-NSRH) for early and locally-advanced cervical cancer, with particular emphasis on post-surgical pelvic function.

Methods

All consecutive patients who underwent class C1-NSRH plus bilateral pelvic + para-aortic lymphadenectomy for stage IA2–IIB cervical cancer at 4 Italian gynecologic oncologic centers (Negrar, Varese, Bologna, Avellino) were enrolled. Patients were divided into TL-NSRH and OA-NSRH groups and were investigated with preoperative questionnaires on urinary, rectal and sexual function. Postoperatively, patients filled a questionnaire assessing quality of life, taking into account sexual function and psychological status. Oncological outcomes were analyzed using Kaplan-Meyer method.

Results

301 consecutive patients were included in this study: 170 in the TL-NSRH group and 131 in the OA-NSRH group. Patients in the OA-NSRH group were more likely to experience urinary incontinence and (after 12-months follow-up) urinary retention. No patient in the TL-NSRH group vs. 5 (5.5%) in the OA-NSRH group had complete urinary retention (at the >24-month follow-up [p=0.02]). A total of 20 (11.8%) in the TL-NSRH and 11 (8.4%) patients in the OA-NSRH had recurrence of disease (p=0.44) and 14 (8.2%) and 9 (6.9%) died of disease during follow-up, respectively (p=0.83).

Conclusion

Our study shows that TL-NSRH is feasible, safe and effective and conjugates adequate radicality and improvement in post-operative functional outcomes. Oncological outcomes of laparoscopic procedures deserve further investigation.

Systematic Nerve Sparing during Surgery for Deep-infiltrating Posterior Endometriosis Improves Immediate Postoperative Urinary Outcomes

STUDY OBJECTIVE

Evaluate the feasibility and risk-benefit ratio of systematic nerve sparing by complete dissection of the inferior hypogastric nerves and afferent pelvic splanchnic nerves during surgery for deep-infiltrating endometriosis (DIE) on the basis of complication rates and postoperative bladder morbidity.

DESIGN

Observational before (2012-2014)-and-after (2015-2017) study based on a prospectively completed database of all patients treated medically or surgically for endometriosis.

SETTING

Unicentric study at the Centre Hospitalier Intercommunal de Poissy-St-Germain-en-Laye.

PATIENTS

This study included patients undergoing laparoscopic surgery for DIE (pouch of Douglas resection with or without colpectomy or bilateral uterosacral ligament resection), with complete excision of all identifiable endometriotic lesions, with or without an associated digestive procedure, between 2012 and 2017. The exclusion criteria included prior history of surgery for DIE or colorectal DIE excision, unilateral uterosacral ligament resection, and bladder endometriotic lesions.

INTERVENTIONS

For the patients in group 1 (2012-2014, n = 56), partial dissection of the pelvic nerves was carried out only if they were macroscopically caught in endometriotic lesions, without dissection of the pelvic splanchnic nerves. The patients in group 2 (2015-2017, n = 65) systematically underwent nerve sparing during DIE surgery, with dissection of the inferior hypogastric nerves and pelvic splanchnic nerves.

MEASUREMENTS AND MAIN RESULTS

Both groups were comparable in terms of patient age, parity, body mass index, and previous abdominal surgery. The operating times were similar in both groups (228 ± 105 minutes in group 2 vs 219 ± 71 minutes in group 1), as were intra- and postoperative complication rates. Time to voiding was significantly longer in the patients in group 1 (p <.01), with 7 (12.9%) patients requiring self-catheterization in this group compared with no patients (0%) in group 2. The duration of self-catheterization for the 7 patients in group 1 was 28, 21, 3, 60, 21, 1 (stopped by the patient), and 28 days, respectively. Uroflowmetry on postoperative day 10 was abnormal in 5/25 patients in group 1 compared with 1/33 in group 2 (p = .031).

CONCLUSION

Systematic and complete nerve sparing, including pelvic splanchnic nerve dissection, during surgery for posterior DIE improves immediate postoperative urinary outcomes, reducing the need for self-catheterization without increasing operating time or complication rates.

Laparoscopic nerve-sparing radical hysterectomy without uterine manipulator for cervical cancer stage IB: description of the technique, our experience and results after the era of LACC trial

PURPOSE

The aim of this study is to evaluate surgical data and oncological outcome of laparoscopic nerve-sparing radical hysterectomy without uterine manipulator for cervical cancer stage IB, over the last 8 years.

METHODS

This retrospective study includes 32 patients with cervical cancer Figo stage (2009) IB who underwent laparoscopic nerve-sparing radical hysterectomy without using any kind of uterine manipulator. Patients were eligible if they had squamous cell carcinoma, adenocarcinoma, or adeno-squamous carcinoma, and no para-aortic lymph node involvement by imaging or after frozen section. The median value and range were assessed for operative outcomes and relapse rate and disease-free survival rate were evaluated using the Kaplan-Meier method.

RESULTS

In the study, 32 patients were included and among them 27 women were stage IB1 (18 cases with tumor size 2-4 cm) and 5 women stage IB2 (Figo stage 2009). The median age of patients was 50.5 years (range 31-68) and median body mass index (B.M.I) was 25.3 kg/m² (range 19-33.5 kg/m²). The average operating time was 228 min (range 147-310 min) and median hospital stay was 2.7 days (range 2-7 days). Approximate blood loss was 188 ml (range 120-300 ml). After a median follow-up of 37 months, we had 2 recurrences out of 32 cases and no death. Especially for patients with Figo stage (2009) IB1, the recurrence rate was 3.7% (1/27). The 3-year PFS was 93.7% and the number at risk 23 (71.8%) and especially for the IB1 stage (2009) women, the 3-year PFS was 96.1% and the number at risk 21 (77.7%). The 3-year OS was 100% with no. at risk 71.8%.

CONCLUSIONS

Laparoscopic nerve-sparing radical hysterectomy without uterine manipulator is feasible and safe surgical procedure for cervical cancer with acceptable surgical and oncological outcomes in the hands of well-trained and experienced laparoscopic surgeons. Our retrospective study reveals better oncological outcome compared to other studies on the minimally invasive approach, where uterine manipulator was routinely used and no vaginal sealing of the tumor was made.

Nerve-sparing in Gynecologic Surgery: A Perspective

OBJECTIVE

To provide a perspective on nerve-sparing (NS) surgery in gynecology.

DATA SOURCES

Literature review, English language.

METHODS OF STUDY SELECTION

Systematic reviews and meta-analyses studies were selected for review for oncology; comparative studies were selected for endometriosis, and 1 comparative and 1 prospective study were chosen for sacrocolpopexy.

TABULATION, INTEGRATION, AND RESULTS

Two tables summarize the results of systematic reviews and meta-analyses in oncology. Oncology, endometriosis, and urogynecology sections. Primary benefit of NS technique is decreased bladder dysfunction, and, to a lesser degree, vaginal and rectal dysfunc.

CONCLUSION

NS is preferable to conventional surgery for benign and malignant conditions to reduce postoperative bladder, rectal, and vaginal dysfunction.

Nerve-sparing radical hysterectomy in the precision surgery for cervical cancer

Precision cancer surgery is a system that integrates the accurate evaluation of tumor extension and aggressiveness, precise surgical maneuvers, prognosis evaluation, and prevention of the deterioration of quality of life (QoL). In this regard, nerve-sparing radical hysterectomy has a pivotal role in the personalized treatment of cervical cancer. Various types of radical hysterectomy can be combined with the nerve-sparing procedure. The extent of parametrium and vagina/paracolpium excision and the nerve-sparing procedure are tailored to the tumor status. Advanced magnetic resonance imaging technology will improve the assessment of the local tumor extension. Validated risk factors for perineural invasion might guide selecting treatment for cervical cancer. Type IV Kobayashi (modified Okabayashi) radical hysterectomy combined with the systematic nerve-sparing procedure aims to both maximize the therapeutic effect and minimize the QoL impairment. Regarding the technical aspect, the preservation of vesical nerve fibers is essential. Selective transection of uterine nerve fibers conserves the vesical nerve fibers as an essential piece of the pelvic nervous system comprising the hypogastric nerve, pelvic splanchnic nerves, and inferior hypogastric plexus. This method is anatomically and surgically valid for adequate removal of the parametrial and vagina/paracolpium tissues while preserving the total pelvic nervous system. Local recurrence after nerve-sparing surgery might occur due to perineural invasion or inadequate separation of pelvic nerves cutting through the wrong tissue plane between the pelvic nerves and parametrium/paracolpium. Postoperative management for long-term maintenance of bladder function is as critical as preserving the pelvic nerves.

[Anatomic reports of vegetative nerves within para rectal fossa, to the rectal endometriosis surgery application]

OBJECTIVES

The objective of the study was to describe the inferior hypogastric plexus and nerves constituting the para-rectal fossa in order to study the importance of anatomical knowledge in rectal endometriosis surgery.

METHODS

In order to discover the complete anatomy of the study area, we carried out a review of the literature and relied on dissection of a female cadaver and operative dissections in patients treated for rectal endometriosis.

RESULTS

The inferior hypogastric plexus, the hypogastric nerve and the pelvic splanchnic nerves are the nervous elements component the para-rectal fossa. These nerves were important urinary, digestive and sexual functions. The dissection of the Okabayashi and the Latzko spaces within the para-rectal fossa and sparing nerve within this zone is more important for the prevention of traumatic nervous sequelae during rectal endometriosis surgery. The pelvic anatomy can be by attraction and sheathing nerve structures by endometriosis lesions which can complicate preservation techniques.

CONCLUSION

Lesions of pelvic vegetative nerves running through the para-rectal fossa can be responsible for urinary, digestive and sexual disorders that can affect patients quality of life. There is currently only one standardized "nerve sparing" technique in pelvic endometriosis surgery. Knowledge of the anatomy of the nerves making up the para-rectal fossa helps to orient the operative dissection and prevent postoperative nerve complications after surgery for rectal endometriosis.

Surgical, Urinary, and Survival Outcomes of Nerve-sparing Versus Traditional Radical Hysterectomy: A Retrospective Cohort Study in China

Supplemental Digital Content is available in the text.

The purpose of this retrospective study was to compare the surgical, urinary, and survival outcomes between nerve-sparing radical hysterectomy (NSRH) and traditional radical hysterectomy (TRH) for stage IB cervical cancer, in which all the primary procedures were performed by a single physician.

Efficacy of nerve‑sparing radical hysterectomy vs. conventional radical hysterectomy in early‑stage cervical cancer: A systematic review and meta‑analysis

The aim of the present study was to compare the oncological outcome of nerve-sparing radical hysterectomy (NSRH) and conventional radical hysterectomy (CRH) for early-stage cervical cancer using a meta-analysis. A systematic review and meta-analysis was conducted, including 4 randomized controlled trials (RCT), 8 case-control and 11 comparative cohort studies comparing the morbidity, pelvic dysfunctions and oncological outcome between the two surgical methods. A total of 23 studies were included in this meta-analysis. The studies reported data of patients affected by cervical cancer; were written in English; included ≥20 patients; and reported data of patients with a comparison of clinical outcomes between NSRH and CRH. Data were extracted and risk of bias was assessed by four independent reviewers. A total of 1,796 patients were included: 884 patients (49.2%) undergoing NSRH and 912 (50.8%) undergoing CRH. The meta-analyses were conducted using Review Manager version 5.3 software, which is designed for conducting Cochrane reviews. As regards perioperative parameters, NSRH was found to be associated with a lower intraoperative blood loss and a shorter length of hospital stay in comparison with CRH. Patients undergoing NSRH experienced lower incidence of urinary, colorectal and sexual dysfunction compared with patients undergoing CRH. However, the resected parametrial width was favorable in patients with CRH, suggesting that NSRH was inferior to CRH in terms of radicality. The 5-year disease-free and overall survival rates were similar between the two groups. In this systematic review and meta-analysis, the collected data to date demonstrated that the nerve-sparing approach guarantees minimized surgical-related pelvic dysfunction, with similar oncological outcomes as CRH. However, further RCTs should be conducted to confirm the superiority and safety of NSRH.

Urodynamic outcomes after pelvic nerve-sparing radical hysterectomy with or without neoadjuvant chemotherapy

OBJECTIVE: Our purposes of this study were to characterize a group of bulky cervical cancer patients who underwent a nerve sparing radical hysterectomy (NSRH) with or without neoadjuvant chemotherapy (NAC), to compare surgical outcomes and the preservation of bladder function, and to compare prognoses.

RESULTS: Fifty-three patients had NSRH without NAC (Group A), and 33 patients had NSRH after NAC (Group B). With regard to prognostic factors, there was only a significant difference between both groups with regard to lymph node metastasis (15% vs 42%, P = 0.01). Moreover, bladder function in Group B patients improved to the same extent as the preoperative rate three months postoperatively. These data were similar to the results in Group A. With regard to overall survival, the 5-year survival rate was 98.1% (95% confidence interval (CI) 87.8–99.7) in Group A and 86.7% (95% CI 71.7–96.7) in Group B (P > 0.1).

METHODS: We retrospectively identified 86 patients with cervical cancer who underwent NSRH at Osaka Medical College from May 2009 to November 2016. NAC was performed via balloon occluded arterial infusion. We extracted data on the patient's stage of progress, tumor volume, histological subtype, bleeding volume, urodynamic study results, and postoperative complications. The data were divided into two groups - those patients who received NAC and those who did not - and then compared.

CONCLUSIONS: According to our analysis, NSRH surgery after NAC via balloon occluded arterial infusion brings beneficial results to patients with bulky IB2 to IIB cervical cancers.

Nerve-sparing versus non-nerve-sparing radical hysterectomy: surgical and long-term oncological outcomes

Objectives

There are controversies regarding the long-term oncological safety of preservation of pelvic innervation during radical hysterectomy (RH). This study aimed to analyze the feasibility and safety of nerve-sparing radical hysterectomy (NSRH) for cervical cancer compared with non-NSRH following 17 years of experience in a tertiary cancer referral center.

Materials and Methods

Between May 1999 and June 2016, all patients who underwent RH for cervical cancer were followed-up prospectively. Comparison analyses regarding surgical outcomes, complications, overall survival (OS), disease-free survival (DFS), and cancer-specific survival (CSS) were performed between patients treated with NSRH and non-NSRH.

Results

A total of 188 patients were included (113 non-NSRH and 75 NSRH). The median follow-up was 112 months. Estimated blood loss and hospital stay were all significantly lower in the NSRH group. Overall intraoperative complication rate (p = 0.02) and need for transfusion (p = 0.016) were lower in the NSRH group. There were no differences in the median operation time, OS, DFS, CSS, or recurrence rates between the NSRH and non-NSRH group.

Conclusions

Our study provides a wide perspective on the developments of nerve-sparing procedures for the management of women with early-stage cervical cancer. Our results suggest that NSRH is a feasible and safe procedure, with reduced morbidity outcomes.

What will the future hold for artificial organs in the service of assisted reproduction: prospects and considerations

Assisted reproduction provides a wide spectrum of treatments and strategies addressing infertility. However, distinct groups of infertile patients with unexplained infertility, congenital disorders, and other complex cases pose a challenge in in vitro fertilization (IVF) practices. This special cohort of patients is associated with futile attempts, IVF overuse, and dead ends in management. Cutting edge research on animal models introduced this concept, along with the development of artificial organs with the aim to mimic the respective physiological functions in reproduction. Extrapolation on clinical application leads to the future use of infertility management in humans. To date, the successful clinical application of artificial reproductive organs in humans is not feasible because further animal model studies are required prior to clinical trials. The application of these artificial organs could provide a solution to infertility cases with no other options. This manuscript presents an overview on the current status, future prospects, and considerations on the potential clinical application of artificial ovary, uterus, and gametes in humans. This paper presents how the IVF practice landscape may be shaped and challenged in the future, along with the subsequent concerns in assisted reproductive treatments.

Perineural invasion in cervical cancer: pay attention to the indications of nerve-sparing radical hysterectomy

Perineural invasion (PNI) in early-stage cervical cancer, is associated with multiple high-risk factors and represents a poor outcome in the patients. For nerve-sparing radical hysterectomy (NSRH) to become a standard and widely used treatment for cervical cancer, we need to define its oncological safety, and to establish standardized surgical procedures and indications of NSRH. Here, we review the definition and mechanisms, and clinical significance of PNI in cervical cancer, and discuss the indications of NSRH. PNI should be regarded as one of the main pathological features of cervical cancer and a factor affecting prognosis. A deeper understanding of PNI in cervical cancer, hopefully, will provide clear indications of NSRH.

Nerve-sparing radical hysterectomy compared to standard radical hysterectomy for women with early stage cervical cancer (stage Ia2 to IIa)

BACKGROUND

Radical hysterectomy is one of the standard treatments for stage Ia2 to IIa cervical cancer. Bladder dysfunction caused by disruption of the pelvic autonomic nerves is a common complication following standard radical hysterectomy and can affect quality of life significantly. Nerve-sparing radical hysterectomy is a modified radical hysterectomy, developed to permit resection of oncologically relevant tissues surrounding the cervical lesion, while preserving the pelvic autonomic nerves.

OBJECTIVES

To evaluate the benefits and harms of nerve-sparing radical hysterectomy in women with stage Ia2 to IIa cervical cancer.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL; 2018, Issue 4), MEDLINE via Ovid (1946 to May week 2, 2018), and Embase via Ovid (1980 to 2018, week 21). We also checked registers of clinical trials, grey literature, reports of conferences, citation lists of included studies, and key textbooks for potentially relevant studies.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) evaluating the efficacy and safety of nerve-sparing radical hysterectomy compared to standard radical hysterectomy for women with early stage cervical cancer (stage Ia2 to IIa).

DATA COLLECTION AND ANALYSIS

We applied standard Cochrane methodology for data collection and analysis. Two review authors independently selected potentially relevant RCTs, extracted data, evaluated risk of bias of the included studies, compared results and resolved disagreements by discussion or consultation with a third review author, and assessed the certainty of evidence.

MAIN RESULTS

We identified 1332 records as a result of the search (excluding duplicates). Of the 26 studies that potentially met the review criteria, we included four studies involving 205 women; most of the trials had unclear risks of bias. We identified one ongoing trial.The analysis of overall survival was not feasible, as there were no deaths reported among women allocated to standard radical hysterectomy. However, there were two deaths in among women allocated to the nerve-sparing technique. None of the included studies reported rates of intermittent self-catheterisation over one month following surgery. We could not analyse the relative effect of the two surgical techniques on quality of life due to inconsistent data reported. Nerve-sparing radical hysterectomy reduced postoperative bladder dysfunctions in terms of a shorter time to postvoid residual volume of urine ≤ 50 mL (mean difference (MD) -13.21 days; 95% confidence interval (CI) -24.02 to -2.41; 111 women; 2 studies; low-certainty evidence) and lower volume of postvoid residual urine measured one month following operation (MD -9.59 days; 95% CI -16.28 to -2.90; 58 women; 2 study; low-certainty evidence). There were no clear differences in terms of perioperative complications (RR 0.55; 95% CI 0.24 to 1.26; 180 women; 3 studies; low-certainty evidence) and disease-free survival (HR 0.63; 95% CI 0.00 to 106.95; 86 women; one study; very low-certainty evidence) between the comparison groups.

AUTHORS' CONCLUSIONS

Nerve-sparing radical hysterectomy may lessen the risk of postoperative bladder dysfunction compared to the standard technique, but the certainty of this evidence is low. The very low-certainty evidence for disease-free survival and lack of information for overall survival indicate that the oncological safety of nerve-sparing radical hysterectomy for women with early stage cervical cancer remains unclear. Further large, high-quality RCTs are required to determine, if clinically meaningful differences of survival exist between these two surgical treatments.

Laparoscopic Nerve-Sparing Radical Hysterectomy vs Laparoscopic Radical Hysterectomy in Cervical Cancer: A Systematic Review and Meta-Analysis of Clinical Efficacy and Bladder Dysfunction

It is widely accepted that nerve-sparing radical hysterectomy is associated with less postoperative morbidity compared with radical hysterectomy, whereas clinical safety is similar in the 2 procedures. However, there is insufficient evidence to compare these procedures performed via a laparoscopic approach. We performed a systematic review and meta-analysis of studies to compare the clinical efficacy and the rate of bladder dysfunction, including urodynamic assessment, in laparoscopic nerve-sparing radical hysterectomy (LNSRH) and laparoscopic radical hysterectomy (LRH). Thirty articles including a total of 2743 participants were analyzed. Operating times were shorter (MD, 29.88 minutes; 95% confidence interval [CI], 11.92-47.83 minutes) and hospital stays were longer (MD, -1.56 days; 95% CI, -2.27 to -0.84 days) in the LRH group compared with the LNSRH group. In addition, blood loss and the number of resected lymph nodes were not significantly different between the 2 groups. However, resected parametrium length (MD, -0.02 cm; 95% CI, -0.05 to -0.00 cm) and vaginal cuff width (MD, -0.06 cm; 95% CI, -0.09 to -0.04) were smaller in the LNSRH group. Furthermore, LNSRH tended to result in more satisfactory micturition (odds ratio, 2.90; 95% CI, 2.01-4.19), shorter catheterization time (MD, -7.20 days; 95% CI, -8.10 to -6.29 days), and shorter recovery to normal postvoid residual urine time (MD, -7.71 days; 95% CI, -8.92 to -6.50 days). Other bladder dysfunction symptoms, including urinary retention, nocturia, dysuria, urinary incontinence, and frequency/urgency were more frequent in the LRH group. Furthermore, LNSRH achieved better results in urodynamic assessments (all p < .05). In conclusion, LNSRH was associated with lower rates of impaired bladder function and a shorter extent of resection compared with LRH. Clinical applications involving LNSRH should be explored with caution.

Vaginal drug delivery for the localised treatment of cervical cancer

Cervical cancer is usually treated by surgery, with the more advanced cancers requiring adjuvant chemotherapy or radiotherapy. The location of the cervix makes it easily accessible through the vagina for the localised delivery of chemotherapeutic drugs. Localised delivery has the advantage of direct delivery to the site of action resulting in a lower dose having to be required and a reduction in systemic side effects. This approach would be advantageous for fertility sparing surgery, whereby localised delivery could be used to reduce tumour size allowing for a much smaller tumour to be removed, reducing the risk of preterm birth. Furthermore, localised delivery could be used after surgery to reduce the risk of recurrence, which is significantly higher in fertility sparing surgery compared to standard surgery. In this paper, we discuss the number of vaginal dosage forms that have investigated for this purpose, including tablets, rings, bioadhesive and cervical caps. APIs under investigation have ranged from well-established chemotherapeutic drugs to more experimental compounds.

Predicting factors for resumption of spontaneous voiding following nerve-sparing radical hysterectomy

Objective

To determine factors affecting voiding recovery on the day of Foley catheter removal (postoperative day 7, POD7) after nerve-sparing radical hysterectomy (NSRH) for early-stage cervical cancer.

Methods

Early-stage cervical cancer patients, who underwent type C1 radical hysterectomy between January 2006 and June 2016 were included. Clinical and pathological data were reviewed. Association between inability to attain adequate voiding function on POD7 and potential predicting factors were evaluated in univariate and multivariate analysis.

Results

Of 755 patients, 383 (50.7%) resumed adequate voiding function on POD7 while 372 (49.3%) did not. Tumor size was larger in patients whose voiding function was inadequate (2.5 vs. 2.0 cm, p=0.001). Lengths of resected parametria and adjacent vagina were more extensive in patients with inadequate voiding function (p<0.001). In univariate analysis, factors significantly associated with inability to attain adequate voiding function included tumor size >4 cm (p<0.001), primary surgeon (p<0.001), postoperative urinary tract infection (p<0.01), grossly visible tumor (p<0.01), and not having prior conization (p<0.01). In multivariate analysis, tumor size >4 cm, postoperative urinary tract infection, and primary surgeon were significantly associated with inability to attain adequate voiding function on POD7.

Conclusion

Extent of disease represented by tumor size, urinary tract infection as well as individual surgeon's technique independently predict resumption of adequate voiding function on POD7 following NSRH.

Robotic radical hysterectomy is superior to laparoscopic radical hysterectomy and open radical hysterectomy in the treatment of cervical cancer

Objective

Cervical cancer (CC) continues to be a global burden for women, with higher incidence and mortality rates reported annually. Many countries have witnessed a dramatic reduction in the prevalence of CC due to widely accessed robotic radical hysterectomy (RRH). This network meta-analysis aims to compare intraoperative and postoperative outcomes in way of RRH, laparoscopic radical hysterectomy (LTH) and open radical hysterectomy (ORH) in the treatment of early-stage CC.

Methods

A comprehensive search of PubMed, Cochrane Library and EMBASE databases was performed from inception to June 2016. Clinical controlled trials (CCTs) of above three hysterectomies in the treatment of early-stage CC were included in this study. Direct and indirect evidence were incorporated for calculating values of weighted mean difference (WMD) or odds ratio (OR), and drawing the surface under the cumulative ranking curve (SUCRA).

Results

Seventeen 17 CCTs were ultimately enrolled in this network meta-analysis. The network meta-analysis showed that patients treated by RRH and LRH had lower estimated blood loss compared to patients treated by ORH (WMD = -399.52, 95% CI = -600.64~-204.78; WMD = -277.86, 95%CI = -430.84 ~ -126.07, respectively). Patients treated by RRH and LRH had less hospital stay (days) than those by ORH (WMD = -3.49, 95% CI = -5.79~-1.24; WMD = -3.26, 95% CI = -5.04~-1.44, respectively). Compared with ORH, patients treated with RRH had lower postoperative complications (OR = 0.21, 95%CI = 0.08~0.65). Furthermore, the SUCRA value of three radical hysterectomies showed that patients receiving RRH illustrated better conditions on intraoperative blood loss, operation time, the number of resected lymph nodes, length of hospital stay and intraoperative and postoperative complications, while patients receiving ORH demonstrated relatively poorer conditions.

Conclusion

The results of this meta-analysis confirmed that early-stage CC patients treated by RRH were superior to patients treated by LRH and ORH in intraoperative blood loss, length of hospital stay and intraoperative and postoperative complications, and RRH might be regarded as a safe and effective therapeutic procedure for the management of CC.

[Nerve sparing techniques in deep endometriosis surgery to prevent urinary or digestive functional disorders: Techniques and results: CNGOF-HAS Endometriosis Guidelines]

OBJECTIVES

To evaluate the feasibility and functional urinary and digestive results of nerve sparing techniques in endometriosis surgery.

METHODS

A research on the medline/pubmed database using specific keywords (nerve sparing, endometriosis, pelvic nerves) identified 7 publications among about 50 whose purpose was to describe the feasibility, the techniques and the functional results of nerve preservation in this indication. Among them there are: 2 uncontrolled retrospective studies, 3 prospective non-randomized studies, a meta-analysis and a review of the literature.

RESULTS

Nerve preservation requires a perfect knowledge of the anatomy of the pelvic autonomic system. The laparoscopic approach is preferred by the different authors due to its anatomical advantage. The feasibility of this technique seems to be demonstrated despite certain limitations in the different studies and depending of the retroperitoneal extension of the lesions. When feasible, it is likely to significantly improve postoperative urinary function (urinary retention) compared to a conventional technique. It is observed no difference regarding digestive function.

CONCLUSIONS

Nerve sparing in this indication is a technique the feasibility of which has been demonstrated and is subject to the topography and extent of the disease. In the absence of invasion or entrapment of pelvic autonomic nerves by endometriosis, this technique improves postoperative voiding function (NP3). During pelvic surgery for endometriosis, it is recommended to identify and preserve autonomic pelvic nerves whenever possible (GradeC).

Long-Term Oncological Outcome After Conventional Radical Hysterectomy Versus 2 Nerve-Sparing Modalities for Early Stage Cervical Cancer

OBJECTIVES

Nerve-sparing radical hysterectomy for early stage cervical cancer was introduced to improve quality of life after treatment. Sparing the pelvic autonomic nerves reduces bladder, bowel, and sexual dysfunction. The Leiden nerve-sparing radical hysterectomy (LNSRH) was modified to the Swift procedure, the latter being more radical regarding the sacrouterine and parametrial resection. We investigate whether nerve-sparing surgery has comparable oncological outcomes as the conventional radical hysterectomy (CRH). Concurrently, we investigate whether there is a difference regarding the oncological outcomes of the 2 nerve-sparing techniques.

METHODS

This is a single-center, observational prospective cohort study analyzing oncological outcomes in women undergoing CRH (1994-1999), LNSRH (2001-2005), or Swift procedure (2006-2010) for early stage cervical cancer (International Federation of Gynecology and Obstetrics IA2-IIA).

RESULTS

Three hundred sixty-three patients (124 CRH, 122 LNSRH, and 117 Swift) were included. International Federation of Gynecology and Obstetrics stage IB2 or higher (P = 0.005) was significantly more prevalent in the CRH cohort. The 5-year pelvic relapse-free survival and overall survival were not significantly different between the 3 cohorts (P = 0.116). Regarding the nerve-sparing cohorts, the Swift cohort showed a significant better 5-year overall survival (87.2%) compared with the LNSRH cohort (78.8%) (P = 0.04). In the LNSRH cohort, resection planes less than 5 mm free and need for adjuvant therapy were significantly higher than in the Swift cohort (P = 0.026 and 0.046, respectively).

CONCLUSIONS

The nerve-sparing radical hysterectomy shows a similar oncological outcome compared with the CRH. The more radical Swift version of nerve-sparing techniques is preferable to the former LNSRH procedure.

Favorable factors for preserving bladder function after nerve-sparing radical hysterectomy: A protocol-based validation study

OBJECTIVES

To investigate favorable factors of nerve-sparing radical hysterectomy (NSRH) for preserving the pelvic autonomic nerves and subsequent bladder function and to compare the safety between NSRH and conventional radical hysterectomy (CRH) for cervical cancer.

METHODS

We recruited 87 consecutive patients with IB1-IIA cervical cancer who underwent NSRH, and reviewed the information of 81 patients who received CRH for historical comparisons. One gynaecologic oncologist performed all operations.

RESULTS

IB1 disease was the only favorable factor for unilateral or bilateral preservation (adjusted OR, 0.245; 95% CI, 0.077-0.774), whereas IB1 disease and squamous cell carcinoma (SqCC) were favorable for bilateral preservation (adjusted ORs, 0.336 and 0.116; 95% CIs, 0.162-0.982 and 0.023-0.581). The median duration of postoperative catheterization (DPC) was different among bilateral, unilateral and failed preservation (median 6 vs 18 vs 90 days; P < 0.001). The median DPC was shorter in NSRH patients with stage IB1 disease or SqCC (7 vs 14 days; P < 0.05) despite no difference between NSRH and CRH in those with IB2-IIA disease or non-SqCC. Survival was not different between NSRH and CRH patients.

CONCLUSIONS

IB1 disease and SqCC are favorable for preserving the pelvic autonomic nerves and subsequent bladder function without compromising survival outcomes in patients treated with NSRH.

The Physiology of Female Sexual Function and the Pathophysiology of Female Sexual Dysfunction (Committee 13A)

INTRODUCTION

The article consists of six sections written by separate authors that review female genital anatomy, the physiology of female sexual function, and the pathophysiology of female sexual dysfunction but excluding hormonal aspects.

AIM

To review the physiology of female sexual function and the pathophysiology of female sexual dysfunction especially since 2010 and to make specific recommendations according to the Oxford Centre for evidence based medicine (2009) "levels of evidence" wherever relevant.

CONCLUSION

Recommendations were made for particular studies to be undertaken especially in controversial aspects in all six sections of the reviewed topics. Despite numerous laboratory assessments of female sexual function, genital assessments alone appear insufficient to characterise fully the complete sexual response.

Rapid and accurate peripheral nerve imaging by multipoint Raman spectroscopy

Raman spectroscopy allows label-free, minimally invasive, and accurate detection of peripheral nerves. However, the conventional Raman imaging technique is time-consuming when measuring a large area of a sample. Establishing a method for rapidly acquiring spatial distribution of a bundle of peripheral nerve fibers is an essential step for Raman spectroscopy towards application in clinical surgery. Here we present a multipoint Raman spectroscopic technique for rapid peripheral nerve imaging. In only 5 seconds, spectra at 32 points situated on ex vivo rat peripheral nerve bundles and adjoining connective tissues were acquired. Principal component regression and discriminant analysis of spectra revealed that the sensitivity, specificity and accuracy for nerve detection were 85.8%, 96.0%, and 90.8%, respectively. Of 158 peripheral nerves, 152 (96.2%) showed ratio of the number of nerve-positive prediction points to the total measurement points being 0.4 or larger, whereas 119 (99.2%) connective tissues among 120 showed ratio smaller than 0.4. Based on the ratio and a bright-field image of the sample, accurate visualization of peripheral nerves was implemented. The results indicated that the multipoint Raman spectroscopic technique is capable of rapid and accurate peripheral nerve imaging.

Intraoperative nerve staining in nerve-sparing radical hysterectomy: a pilot study

OBJECTIVE

To evaluate the feasibility and effectiveness of intraoperative nerve staining by modified leucomethylene blue (MLB).

METHODS

Animal experiment was performed to assure whether the tissues dyed blue by MLB were nerves with microscopic examination. Ten patients with cervical cancer were performed by nerve-sparing radical hysterectomy (NSRH) and nerve staining intraoperatively by MLB. The status of staining was recorded. The post-void residual urine volume after removing was measured by ultrasound. The time to post-void residual urine volume of less than 100 ml and the first defecation were recorded.

RESULTS

In animal experiment, the tissues dyed blue obviously showed abundant nerve fibers by microscopic examination. The minor nerves were dyed blue clearly in NSRH. The time to post-void residual urine volume of less than 100 ml after removal of the urethral catheter was 10.3 (7-13) days by records. The time to the first defecation was 67.7 (60-82) h.

CONCLUSION

Intraoperative nerve staining by MLB provided a new method for nerve location in NSRH. It was safe, effective and convenient.

Nerve-sparing radical hysterectomy versus conventional radical hysterectomy in early-stage cervical cancer. A systematic review and meta-analysis of survival and quality of life

BACKGROUND AND AIMS

Survival after radical hysterectomy (RH) for early-stage cervical cancer is good. Hence quality of life (QOL) after treatment is an important issue. Nerve-sparing radical hysterectomy (NSRH) improves QOL by selectively sparing innervation of bladder, bowel and vagina, reducing therapy-induced morbidity. However, the oncological outcome and the functional outcome after NSRH are subjects of debate. We aim to present the best possible evidence available regarding both QOL and survival after NSRH in early-stage cervical cancer.

METHODS

Systematic review and meta-analysis on studies comparing NSRH and RH.

RESULTS

Forty-one studies were included, and 27 were used for the meta-analysis. There was no difference in 2-, 3- and 5-year overall survival: the risk ratios (RRs) were respectively 1.02 (95% CI 0.99-1.05, n=879), 1.01 (95% CI 0.95-1.08, n=1324) and 1.03 (95% CI 0.99-1.08, n=638). No difference was found in 2-, 3- and 5-year disease-free survival: RR 1.01 (95% CI 0.95-1.05, n=1175), 0.99 (95% CI 0.94-1.03, n=1130) and 1.00 (95% CI 0.95-1.06, n=933) respectively. Post-operative time to micturition was significantly shorter in the NSRH group: standardized mean difference (SMD) -0.84 (CI 95% -1.07 to -0.60).

CONCLUSIONS

NSRH can be considered safe and effective for early-stage cervical cancer since short- and long-term survival do not differ from those of conventional RH, while bladder function after NSRH is significantly less impaired.

Evaluation of the association between perineural invasion and clinical and histopathological features of cervical cancer

Perineural invasion (PNI) has been investigated as a new prognostic factor in a number of carcinomas. However, studies on PNI in cervical cancer are limited, and inconsistent conclusions have been reported by different groups. The aim of the present study was to analyze the relationship between perineural invasion (PNI) and clinical and histopathological features of cervical cancer, and to evaluate the clinical significance of PNI of cervical cancer. Retrospective review identified 206 patients with cervical cancer who underwent radical hysterectomy plus pelvic lymphadenectomy between December 2012 and August 2014. The association between PNI and clinical and histopathological features of cervical cancer and post-operative radiotherapy was evaluated based on univariate and multivariate analyses. PNI of cervical cancer was identified in 33 of 206 (16%) cervical cancer patients. Univariate analysis demonstrated that PNI was associated with clinical stage, tumor grade, tumor size, depth of invasion, lymphovascular space invasion (LVSI), and lymph node metastasis (P<0.05), but not associated with age and histopathological types (P>0.05). Multivariate analysis suggests that LVSI and lymph node metastasis were associated with PNI of cervical cancer (P<0.05). In addition, post-operative radiotherapy was significantly more recommended for patients with PNI than those without PNI (P<0.001). In conclusion, PNI of cervical cancer is associated with LVSI and lymph node metastasis and can be used as an index for the determination of post-operative radiotherapy for cervical cancer patients.

Robotic Compartment-Based Radical Surgery in Early-Stage Cervical Cancer

A radical hysterectomy with pelvic lymphadenectomy is the recommended treatment option in patients with early-stage cervical cancer. Although various classifications were developed in order to define the resection margins of this operation, no clear standardization could be achieved both in the nomenclature and in the extent of the surgery. Total mesometrial resection (TMMR) is a novel procedure which aims to remove all components of the compartment formed by Müllerian duct in which female reproductive organs develop. TMMR differs from the conventional radical hysterectomy techniques in that its surgical philosophy, terminology, and partly resection borders are different. In this paper, a TMMR with therapeutic pelvic lymphadenectomy operation that we performed for the first time with robot-assisted laparoscopic (robotic) approach in an early-stage cervical cancer patient was presented. This procedure has already been described in open surgery by Michael Höckel and translated to the robotic surgery by Rainer Kimmig. Our report is the second paper, to our knowledge, to present the initial experience regarding robotic TMMR in the English literature.

Conventional versus nerve-sparing radical surgery for cervical cancer: a meta-analysis

Objective

Although nerve-sparing radical surgery (NSRS) is an emerging technique for reducing surgery-related dysfunctions, its efficacy is controversial in patients with cervical cancer. Thus, we performed a meta-analysis to compare clinical outcomes, and urinary, anorectal, and sexual dysfunctions between conventional radical surgery (CRS) and NSRS.

Methods

After searching PubMed, Embase, and the Cochrane Library, two randomized controlled trials, seven prospective and eleven retrospective cohort studies were included with 2,253 patients from January 2000 to February 2014. We performed crude analyses and then conducted subgroup analyses according to study design, quality of study, surgical approach, radicality, and adjustment for potential confounding factors.

Results

Crude analyses showed decreases in blood loss, hospital stay, frequency of intraoperative complications, length of the resected vagina, duration of postoperative catheterization (DPC), urinary frequency, and abnormal sensation in NSRS, whereas there were no significant differences in other clinical parameters and dysfunctions between CRS and NSRS. In subgroup analyses, operative time was longer (standardized difference in means, 0.948; 95% confidence interval [CI], 0.642 to 1.253), while intraoperative complications were less common (odds ratio, 0.147; 95% CI, 0.035 to 0.621) in NSRS. Furthermore, subgroup analyses showed that DPC was shorter, urinary incontinence or frequency, and constipation were less frequent in NSRS without adverse effects on survival and sexual functions.

Conclusion

NSRS may not affect prognosis and sexual dysfunctions in patients with cervical cancer, whereas it may decrease intraoperative complications, and urinary and anorectal dysfunctions despite long operative time and short length of the resected vagina when compared with CRS.

Efficacy and oncologic safety of nerve-sparing radical hysterectomy for cervical cancer: a randomized controlled trial

OBJECTIVE

A prospective, randomized controlled trial was conducted to evaluate the efficacy of nerve-sparing radical hysterectomy (NSRH) in preserving bladder function and its oncologic safety in the treatment of cervical cancer.

METHODS

From March 2003 to November 2005, 92 patients with cervical cancer stage IA2 to IIA were randomly assigned for surgical treatment with conventional radical hysterectomy (CRH) or NSRH, and 86 patients finally included in the analysis. Adequacy of nerve sparing, radicality, bladder function, and oncologic safety were assessed by quantifying the nerve fibers in the paracervix, measuring the extent of paracervix and harvested lymph nodes (LNs), urodynamic study (UDS) with International Prostate Symptom Score (IPSS), and 10-year disease-free survival (DFS), respectively.

RESULTS

There were no differences in clinicopathologic characteristics between two groups. The median number of nerve fiber was 12 (range, 6 to 21) and 30 (range, 17 to 45) in the NSRH and CRH, respectively (p<0.001). The extent of resected paracervix and number of LNs were not different between the two groups. Volume of residual urine and bladder compliance were significantly deteriorated at 12 months after CRH. On the contrary, all parameters of UDS were recovered no later than 3 months after NSRH. Evaluation of the IPSS showed that the frequency of long-term urinary symptom was higher in CRH than in the NSRH group. The median duration before the postvoid residual urine volume became less than 50 mL was 11 days (range, 7 to 26 days) in NSRH group and was 18 days (range, 10 to 85 days) in CRH group (p<0.001). No significant difference was observed in the 10-year DFS between two groups.

CONCLUSION

NSRH appears to be effective in preserving bladder function without sacrificing oncologic safety.

Ex vivo peripheral nerve detection of rats by spontaneous Raman spectroscopy

Nerve-sparing surgery is increasingly being applied to avoid functional deficits of the limbs and organs following surgery. Peripheral nerves that should be preserved are, however, sometimes misidentified due to similarity of shape and color to non-nerve tissues. To avoid misidentification of peripheral nerves, development of an in situ nerve detection method is desired. In this study, we report the label-free detection of ex vivo peripheral nerves of Wistar rats by using Raman spectroscopy. We obtained Raman spectra of peripheral nerves (myelinated and unmyelinated nerves) and their adjacent tissues of Wistar rats without any treatment such as fixation and/or staining. For the identification of tissue species and further analysis of spectral features, we proposed a principal component regression-based discriminant analysis with representative Raman spectra of peripheral nerves and their adjacent tissues. Our prediction model selectively detected myelinated nerves and unmyelinated nerves of Wistar rats with respective sensitivities of 95.5% and 88.3% and specificities of 99.4% and 93.5%. Furthermore, important spectral features for the identification of tissue species were revealed by detailed analysis of principal components of representative Raman spectra of tissues. Our proposed approach may provide a unique and powerful tool for peripheral nerve detection for nerve-sparing surgery in the future.

[Lower urinary tract dysfunction following nerve sparing radical hysterectomy: A systematic review]

INTRODUCTION

Radical hysterectomy represents the cornerstone in the management of localized cervical cancer. Despite its oncologic efficacy, radical hysterectomy is associated with a significant amount of complications and a negative impact on quality of life. Surgical technique seems to influence the functional outcomes.

AIM OF THE STUDY

A systematic review to provide an update on the lower urinary tract dysfunction following nerve sparing radical hysterectomy.

METHODS

An initial search was carried out to identify articles for further review, using Cochrane reviews and PubMed and Embase databases. The search terms used were: "nerve sparing" and "cervical cancer" or "radical hysterectomy". The Preferred Reporting Items for Systematic Reviews and Meta-Analyses process for reporting included and excluded studies was followed, with the recommended flowchart showing the numbers of papers identified and included or excluded at each stage.

RESULTS

Twenty-nine clinical studies were included. The absence of a standardized surgical technique for nerve sparing radical hysterectomy and the poor methodological quality of the studies assessing lower urinary tract dysfunction after such intervention limited clear conclusions. However, all studies reported lower incidence of urinary tract dysfunction, urodynamic abnormalities and clean intermittent catheterization following nerve sparing radical hysterectomy compared to conventional technique.

CONCLUSION

Nerve sparing radical hysterectomy is associated with reduced lower urinary tract dysfunction. A standardization of the surgical technique for nerve sparing radical hysterectomy, tailored to each individual is necessary to allow its wide spread diffusion.

Oncological outcomes of nerve-sparing radical hysterectomy for cervical cancer: a systematic review

BACKGROUND

This study aimed to review the oncologic outcomes of nerve-sparing radical hysterectomy (NSRH) in cervical cancer and to compare them with those of standard conventional radical hysterectomy (CRH).

METHODS

A search of the MEDLINE (Ovid), EMBASE (Ovid), and Cochrane Central Register of Controlled Trials (CENTRAL) databases for studies published to March 3, 2014 was performed using the search term "nerve sparing or radical hysterectomy and cervical cancer." The main outcome measure was the recurrence rate after NSRH. The hazard ratio for recurrence was used to compare NSRH and CRH.

RESULTS

A total of 21 studies reported data on oncologic outcomes of NSRH. The recurrence rate after NSRH was reported to be 0 to 19.6 %. Of the 21 studies, 10 comparing outcomes between NSRH and CRH were assessed for their eligibility to be included in a meta-analysis. However, the scarcity and heterogeneity of effect estimates in these comparison trials precluded performance of a meta-analysis.

CONCLUSIONS

The results showed that the evidence addressing the oncologic safety of NSRH over that of CRH in cervical cancer is neither adequate nor statistically relevant. A properly designed, prospective randomized noninferiority trial is needed to assess the oncologic outcomes of NSRH before this surgical approach is adopted as the standard of care for patients with tumors that have unfavorable prognostic features. Until then, NSRH should be considered primarily for patients with small tumors due to the very low risk of parametrial and lymph node involvement, with maximum benefit conferred to the patient from autonomic nerve preservation without any requirement for adjuvant treatment.