Laparoscopic resection and repair of uterine isthmocele

Endometriosis and Isthmocele: Common or Rare?

Higher cesarean section rates and better ultrasound diagnostics have led to a more frequent diagnosis of isthmocele, a cesarean scar defect. Sometimes, endometriosis is found in the isthmocele, but simultaneous extrauterine endometriosis and endometriosis in the isthmocele have not yet been reported. Additionally, the surgical technique to repair the isthmocele is the subject of ongoing controversy. The aim of this study is to analyze a possible correlation between uterine scar (isthmocele) endometriosis and extrauterine endometriosis and to investigate the outcome of laparoscopic isthmocele resection in the rendezvous technique. In this single-center retrospective study, we included 83 women of reproductive age with symptomatic isthmocele undergoing laparoscopic isthmocele repair in rendezvous technique from 2004 to 2020 at the University of Bern. We collected data on patient and surgical characteristics as well as on postoperative outcomes (symptoms, further pregnancy, and pregnancy outcomes) retrospectively. We analyzed and compared these data for patients with and without endometriosis. Endometriosis was diagnosed during surgery in 22 out of 83 operated patients (26.5%). Diagnosis of isthmocele endometriosis (n = 9, 11%) was significantly higher in patients with extrauterine endometriosis (n = 6, p = 0.004). While the duration of surgery was significantly longer for patients with endometriosis (p = 0.006), the groups did not differ with regard to blood loss or complications. In addition, both groups showed similar indications for isthmocele repair (infertility, abnormal uterine bleeding, or dysmenorrhea). Surgery significantly improved abnormal uterine bleeding (χ2 p < 0.001), dysmenorrhea (χ2, p = 0.03), and infertility (χ2, p < 0.001). Regardless of the presence of endometriosis, 25 of 40 (63%) infertile patients became pregnant after surgery. In one out of eight pregnancies, however, we observed scar complications during pregnancy such as uterine scar pregnancy (n = 3), uterine scar dehiscence (n = 3), and placenta previa (n = 1). Endometriosis is a non-negligible intraoperative finding in patients with symptomatic isthmocele. The laparoscopic approach in the rendezvous technique is safe and effective. Therefore, this method should be recommended, especially in women with secondary infertility, and preoperatively simultaneous endometriosis resection should be discussed with the patient. In follow-up, postoperative pregnancies have to be monitored with care.

Optimal Isthmocele Management: Hysteroscopic, Laparoscopic, or Combination

OBJECTIVE

To conduct a systematic review of the literature on the hysteroscopic and laparoscopic repair of isthmocele.

DATA SOURCES

A thorough search of the PubMed/Medline, Embase, and Cochrane databases was performed. (PROSPERO registration number CRD42020190668).

METHODS OF STUDY SELECTION

Studies from the last 20 years that addressed isthmocele repair were collected. Both authors screened for study eligibility and extracted data. All prospective and retrospective studies of more than 10 women were included.

TABULATION, INTEGRATION, AND RESULTS

The initial search identified 666 articles (Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow chart) (see Supplemental Fig.). We excluded duplicates, case reports, reviews, video articles, and technique articles. We also excluded studies describing only laparotomy or vaginal repair as these were not in the scope of this review. A total of 31 articles met the inclusion criteria, 21 for hysteroscopic resection and 13 for laparoscopic or combined repair (4 articles tested both modalities and appear in both Tables 1 and 2).For abnormal uterine bleeding, hysteroscopic remodeling relived symptoms in 60% to 100% of cases and laparoscopy in 78% to 94%. Secondary infertility was not evaluated in all studies. After hysteroscopic and laparoscopic treatment, 46% to 100% and 37.5% to 90% of those who wished to conceive became pregnant, after the procedure, respectively. Pain and dysmenorrhea seem to be uncommon. All studies that tested improvement of pain had fewer than 10 women. However, between 66% and 100% of women who complain of pain or dysmenorrhea will note a marked improvement to full resolution.

CONCLUSION

Patients with an isthmocele or cesarean scar defect are usually asymptomatic. For symptomatic women, a repair is a valid option. For those with residual myometrial thickness >2 to 3 mm, hysteroscopic remodeling is the modality of choice with an improvement in abnormal uterine bleeding, secondary infertility, and pain. Women with a residual myometrial thickness <2- to 3-mm laparoscopic repair with simultaneous hysteroscopic guidance show similar results. Because available data are limited, no cutoff for the correct choice between hysteroscopy and laparoscopy can be concluded. We recommend 2.5 mm as the cutoff value based on common practice and expert opinion, although no significance between hysteroscopic and laparoscopic treatment was shown.