Surgical treatment of Cesarean scar ectopic pregnancy: efficacy and safety of ultrasound-guided suction curettage

Cesarean Scar Ectopic Pregnancy: A Do-Not-Miss Diagnosis

The rate of cesarean section (CS) for delivery has increased internationally, reaching 50% in some countries. Abnormal implantation of a new pregnancy at the site of the prior hysterotomy is an important complication because of the risks of hemorrhage, uterine rupture, and progression to placenta accreta spectrum (PAS), a condition with high morbidity with potential for catastrophic obstetric hemorrhage, maternal and fetal mortality, and loss of fertility. Cesarean scar ectopic pregnancy (CSEP) is the recommended term to describe these pregnancies, which are recognized on the basis of the sac implantation site, growth pattern, and associated abnormal perfusion. The true incidence of CSEP is unknown because the condition is likely underdiagnosed and underreported. The 2022 Society for Maternal-Fetal Medicine consult series notes that severe maternal morbidity and mortality are linked to difficulty in making the diagnosis of CSEP. The authors review the signs of CSEP at imaging, some pitfalls that may lead to delayed or missed diagnosis, and the consequences thereof. CSEPs must be differentiated from low implantation of a normal pregnancy, cervical ectopic pregnancy, and evolving pregnancy loss. Early recognition allows prompt and safe treatment that is usually surgical. Early treatment results in decreased health care costs, a shorter hospital stay, preservation of fertility, and prevention of iatrogenic preterm delivery, which is typical in cases that progress to PAS. Hysterectomy has serious negative psychologic consequences for patients of childbearing age; early diagnosis and prompt treatment of CSEP can prevent this often-ignored complication. ©RSNA, 2024 Supplemental material is available for this article.

Surgical evacuation combined with Shirodkar cervical suture and selective uterine artery embolization: A fertility preserving treatment for 10-15 weeks' live cesarean scar ectopic pregnancies

INTRODUCTION

Cesarean scar ectopic pregnancies (CSEPs) are associated with significant maternal morbidity and termination is often recommended in the early first trimester. Management of more advanced cases is challenging due to higher risks of major intraoperative hemorrhage. Hysterectomy is currently the intervention of choice for advanced cases. This study aimed to investigate if advanced live CSEPs could be managed effectively conservatively using suction curettage and interventional radiology.

MATERIAL AND METHODS

A retrospective single-center cohort study was performed. A total of 371 women diagnosed with CSEP were identified between January 2008 and January 2023. A total of 6% (22/371) women had an advanced live CSEP with crown-rump length (CRL) of ≥40 mm (≥10 weeks' gestation). Of these, 77% (17/22) opted for surgical intervention, whilst the remaining five continued their pregnancies. A preoperative ultrasound was performed in each patient. All women underwent suction curettage under ultrasound guidance and insertion of Shirodkar cervical suture as a primary hemostatic measure combined with uterine artery embolization (UAE) if required. The primary outcome was rate of blood transfusion. Secondary outcomes were estimated intraoperative blood loss, UAE, intensive care unit admission, reintervention, hysterectomy, hospitalization duration and rate of retained products of conception. Descriptive statistics were used to describe these variables.

RESULTS

Median CRL of the 17 patients included was 54.1 mm (range: 40.0-85.7) and median gestational age based on CRL was 12 + 3 weeks (range: 10 + 6-15 + 0). On preoperative ultrasound scan placental lacunae were recorded in 76% (13/17) of patients and color Doppler score was ≥3 in 67% (10/15) of patients. At surgery, Shirodkar cervical suture was used in all cases. It was successful in achieving hemostasis by tamponade in 76% (13/17) of patients. In the remaining 24% (4/17) patients tamponade failed to achieve complete hemostasis and UAE was performed to stop persistent arterial bleeding into the uterine cavity. Median intraoperative blood loss was 800 mL (range: 250-2500) and 41% (7/17) women lost >1000 mL. 35% (6/17) needed blood transfusion. No women required hysterectomy.

CONCLUSIONS

Surgical evacuation with Shirodkar cervical suture and selective UAE is an effective treatment for advanced live CSEPs.

The value of ultrasound parameters in predicting the efficacy of transabdominal ultrasound-guided suction curettage alone in the treatment of cesarean scar pregnancy

OBJECTIVE

To investigate the value of ultrasound parameters in assessing the efficacy of transabdominal ultrasound (TAUS)-guided suction curettage alone for cesarean scar pregnancy (CSP).

METHODS

Secondary retrospective analysis of a prospective study consisted of 137 women diagnosed with CSP who were performed TAUS-guided suction curettage alone for the first time at Maternity and Child Health Care of Guangxi Zhuang Autonomous Region in China. Prior to surgery, an ultrasound examination was conducted. Based on the need for secondary intervention, the patients were categorized into failure group and success group, and the predictive factors for failure of TAUS-guided suction curettage alone were analyzed.

RESULTS

Multivariate logistic regression showed that maximum diameter of the gestational sac>29 mm (odds ratio [OR] = 4.043, 95% CI: 1.100-14.862), residual myometrium thickness ≤1.8 mm (OR = 3.719, 95% CI: 1.148-12.048) and chorionic villi thickness at the scar >4.7 mm (OR = 15.327, 95% CI: 4.617-50.881) were independent predictors of failure in TAUS-guided suction curettage alone for CSP. Furthermore, the logistic regression model that was jointly constructed by these three predictors demonstrated an area under the curve, sensitivity, specificity, and Youden index of 0.913, 0.912, 0.864, and 0.776, respectively.

CONCLUSION

The maximum diameter of the gestational sac, residual myometrium thickness, and chorionic villi thickness at the scar has certain predictive efficacy of TAUS-guided suction curettage alone for CSP. Nevertheless, it is more valuable to apply the model of this study, composed of the three ultrasound parameters, for this prediction purpose.

Surgical treatment and reproductive outcomes in caesarean scar pregnancy at a single center

BACKGROUND

To investigate factors associated with different reproductive outcomes in patients with Caesarean scar pregnancies (CSPs).

METHODS

Between May 2017 and July 2022, 549 patients underwent ultrasound-guided uterine aspiration and laparoscopic scar repair at the Gynaecology Department of Hubei Maternal and Child Health Hospital. Ultrasound-guided uterine aspiration was performed in patients with type I and II CSPs, and laparoscopic scar repair was performed in patients with type III CSP. The reproductive outcomes of 100 patients with fertility needs were followed up and compared between the groups.

RESULTS

Of 100 patients, 43% had live births (43/100), 19% had abortions (19/100), 38% had secondary infertility (38/100), 15% had recurrent CSPs (RCSPs) (15/100). The reproductive outcomes of patients with CSPs after surgical treatment were not correlated with age, body mass index, time of gestation, yields, abortions, Caesarean sections, length of hospital stay, weeks of menopause during treatment, maximum diameter of the gestational sac, thickness of the remaining muscle layer of the uterine scar, type of CSP, surgical method, uterine artery embolisation during treatment, major bleeding, or presence of uterine adhesions after surgery. Abortion after treatment was the only risk factor affecting RCSPs (odds ratio 11.25, 95% confidence interval, 3.302-38.325; P < 0.01) and it had a certain predictive value for RCSP occurrence (area under the curve, 0.741).

CONCLUSIONS

The recurrence probability of CSPs was low, and women with childbearing intentions after CSPs should be encouraged to become pregnant again. Abortion after CSP is a risk factor for RCSP. No significant difference in reproductive outcomes was observed between the patients who underwent ultrasound-guided uterine aspiration and those who underwent laparoscopic scar repair for CSP.

Treatment Outcomes of Cesarean Scar Pregnancy Under a Novel Classification System: A Retrospective Cohort Study

OBJECTIVES

To determine whether the new classification system published by Jordans et al for cesarean scar pregnancy (CSP) can guide management and treatment outcomes.

METHODS

A retrospective study of women diagnosed with CSP from October 2010 to December 2022 in a single tertiary center was performed. Sonographic records of these women were classified into three types according to the classification published by Jordans et al. Treatment outcomes were compared across each type of CSP.

RESULTS

The study included a total of 84 women, where 60 (71.4%), 17 (20.2%), and 7 (8.3%) of them were categorized into Type 1, 2, and 3 CSP, respectively. A total of 47 (55.9%) women were managed with methotrexate, 22 (26.2%) underwent surgical management of the CSP without removal of the Cesarean section (CS) niche, and 11 (13.1%) underwent surgery to remove the CSP and the CS niche. Overall treatment success rates for medical management and surgical management were 70 and 97%, respectively. Four women were managed expectantly and continued their pregnancies, among which three carried beyond 34 weeks and had good neonatal outcomes.

CONCLUSIONS

The classification as published by Jordans et al is easily replicable and readily implemented clinically. Our findings show that a higher proportion of Type 1 and Type 2 CSP were treated successfully by a less invasive medical approach with a high success rate, whereas most Type 3 CSP required surgical resection to successfully remove the CSP and the CS niche. Prospective studies are required to confirm these findings and further validate the clinical utility of this nomenclature system.

Predictive value of crossover sign for outcome of ultrasound-guided vacuum aspiration in women with Cesarean scar pregnancy

OBJECTIVE

To examine the value of the crossover sign (COS) in predicting treatment outcome in women with a Cesarean scar pregnancy (CSP) who were treated with ultrasound-guided vacuum aspiration.

METHODS

This was a retrospective cohort study of women with CSP who underwent ultrasound-guided vacuum aspiration. Based on the relationship between the gestational sac, Cesarean scar and anterior wall of the uterus, CSPs were classified by COS type. Analysis was conducted to investigate the association between COS type (COS-1, COS-2) and treatment outcome. The incidence of treatment failure, retained pregnancy tissue, secondary therapy and bleeding ≥ 200 mL were analyzed.

RESULTS

In total, 181 eligible patients with CSP, including 90 (49.7%) women with COS-1 and 91 (50.3%) women with COS-2, were analyzed. COS-1 patients had a higher incidence of treatment failure compared with COS-2 patients (25.6% vs 8.8%; P = 0.003), as well as higher rates of retained pregnancy tissue (18.9% vs 6.6%; P = 0.013), secondary therapy (20.0% vs 6.6%; P = 0.002) and bleeding of ≥ 200 mL (13.3% vs 4.4%; P = 0.034). COS-1 and a large gestational sac (30.1-50.0 mm or >50.0 mm in diameter) were associated independently with increased risk of treatment failure (odds ratio, 4.57 (95% CI, 1.66-12.56); P = 0.003, 4.34 (95% CI, 1.35-13.94); P = 0.014 and 10.50 (95% CI, 2.54-43.46); P = 0.001, respectively).

CONCLUSIONS

Ultrasound evaluation of the relationship between the gestational sac and the endometrial line (COS classification) in women with CSP may help to predict treatment outcome among those undergoing vacuum aspiration. Among COS-1 patients, especially those with a gestational sac diameter of >30.0 mm, vacuum aspiration may be discouraged. © 2023 International Society of Ultrasound in Obstetrics and Gynecology.

Ultrasound-guided suction curettage followed by cervico-isthmic placement of foley three-way catheter for cesarean scar pregnancy's treatment. Retrospective study

OBJECTIVES

Cesarean scar pregnancy (CSP) is a rare dangerous condition with still no consensus on standard treatment. Suction curettage has been used as the first-line treatment for CSP with controversial outcomes. This study evaluates efficacy of ultrasound-guided suction curettage (UGSC) followed by cervical-isthmic placement of silicon semirigid three-way foley catheter.

MATERIALS AND METHODS

This study included 24 women with CSP. Preoperative ultrasound study was conducted. UGSC followed by placement of catheter was performed in all patients. The success rate and incidence of major complication, surgical time and hospital stay were recorded.

RESULTS

The success rate of UGSC followed by placement of foley catheter was 100%, effectively reduced major complications and none of the patients had a blood loss higher than 900 ml. Median hospital stay was 2 days and median foley stay was 1 day. Surgery had limited last with a median of 17 minutes.

CONCLUSION

UGSC followed by foley placement is a safe effective treatment for CSP with a clinical resolution of 100%. The catheter is easy to place under ultrasound guidance and prevents bleeding, reducing major procedures to solve the bleeding. Suction curettage in CSP treatment should be performed under ultrasound guidance and followed by cervical-isthmic placement of foley balloon.

Society of Family Planning Clinical Recommendation: Management of hemorrhage at the time of abortion

Hemorrhage after abortion is rare, occurring in fewer than 1% of abortions, but associated morbidity may be significant. Although medication abortion is associated with more bleeding than procedural abortion, overall bleeding for the two methods is minimal and not clinically different. Hemorrhage can be caused by atony, coagulopathy, and abnormal placentation, as well as by such procedure complications as perforation, cervical laceration, and retained tissue. Evidence for practices around postabortion hemorrhage is extremely limited. The Society of Family Planning recommends preoperative identification of individuals at high risk of hemorrhage as well as development of an organized approach to treatment. Specifically, individuals with a uterine scar and complete placenta previa seeking abortion at gestations after the first trimester should be evaluated for placenta accreta spectrum. For those at high risk of hemorrhage, referral to a higher-acuity center should be considered. We propose an algorithm for treating postabortion hemorrhage as follows: (1) assessment and examination, (2) uterine massage and medical therapy, (3) resuscitative measures with laboratory evaluation and possible reaspiration or balloon tamponade, and (4) interventions such as embolization and surgery. Evidence supports the use of oxytocin as prophylaxis for bleeding with dilation and evacuation; methylergonovine prophylaxis, however, is associated with more bleeding at the time of dilation and evacuation. Future research is needed on tranexamic acid as prophylaxis and treatment and misoprostol as prophylaxis. Structural inequities contribute to bleeding risk. Acknowledging how our policies hinder or remedy health inequities is essential when developing new guidelines and approaches to clinical services.

Clinical value of ultrasonic indicators in predicting the outcome of caesarean scar pregnancy after pregnancy termination

BACKGROUND

To investigate the predictive value of ultrasound indicators in early pregnancy for the outcome of caesarean scar pregnancy (CSP) after pregnancy termination.

METHODS

This study retrospectively analysed the ultrasound images of 98 CSP patients who underwent transabdominal ultrasound-guided hysteroscopic curettage during early pregnancy at Changsha Hospital for Maternal and Child Health Care between January 2017 and October 2021. Patients were equally divided into a case group and a control group. The case group included 49 CSP patients with postoperative complications, such as intraoperative blood loss ≥ 200 ml or retained products of conception (RPOC). The remaining 49 CSP patients, with similar age and gestational age and with good postoperative outcomes, such as intraoperative blood loss ≤ 50 ml and no RPOC, were included in the control group. CSP was classified into three types according to the location of the gestational sac (GS) relative to the uterine cavity line (UCL) and serosal contour. Differences in ultrasound indicators between the case and control group were compared.

RESULTS

There were significant differences between the case and control groups in the mean gestational sac diameter (MGSD), residual myometrium thickness (RMT) between the GS and the bladder, blood flow around the GS at the site of the previous caesarean incision, and types of CSP (P < 0.05). The rs of each ultrasound indicator were as follows: 0.258, -0.485, 0.369, 0.350. The optimal threshold for predicting good postoperative outcomes, such as intraoperative blood loss ≤ 50 ml and no RPOC, by receiver operating characteristic (ROC) curve analysis of the RMT was 2.3 mm.

CONCLUSION

Our findings show that the RMT, blood flow around the GS at the site of the previous caesarean incision, and types of CSP have a low correlation with postoperative complications, such as intraoperative blood loss ≥ 200 ml or RPOC, of early pregnancy termination in patients with CSP. To some extent, this study may be helpful for clinical prognostic prediction of patients with CSP and formulation of treatment strategies. Given the low correlation between these three indicators and postoperative complications, further studies are needed to identify indicators that can better reflect the postoperative outcomes of CSP patients.

Association of menstrual blood volume and reproductive outcomes in patients with caesarean scar pregnancy managed using uterine artery embolization and curettage

This study aimed to assess the association of menstrual blood volumes (MBV) and reproductive outcomes in patients after uterine artery embolization (UAE) combined with curettage for caesarean scar pregnancy (CSP). This retrospective observational study enrolled women who underwent UAE plus curettage for CSP at the Interventional Department of Henan Provincial People's Hospital between December 2012 and December 2017. The primary outcome was pregnancy rate and the secondary outcomes were live birth rate (LBR) and interpregnancy interval. This study finally included 37 women (16 women with normal MBV and 21 women with decreased MBV) with pregnancy intention after UAE plus curettage for CSP. The pregnancy rate in women with normal MBV was higher than those with decreased MBV (81.3% vs. 47.6%; P = 0.048). There were no differences between the two groups regarding the interpregnancy interval (18.4 ± 8.7 vs. 22.2 ± 10.0 months, P = 0.233), and LBR (63% vs. 38%, P = 0.191). In conclusion, Women with normal MBV after UAE combined with curettage for CSP management might have a higher pregnancy rate compared with patients with decreased MBV, but there were no differences in LBR between the two groups.

Cesarean scar ectopic pregnancy: nuances in diagnosis and treatment

A cesarean scar ectopic pregnancy (CSEP) occurs when the embryo implants on the scar of a previous cesarean delivery. The number of births delivered by cesarean section has climbed by 50% over the last decade, from a nadir of 20.7% in 1996 to 32.1% in 2021. As a result, the incidence of CSEP has also increased. Because CSEP may cause serious morbidity such as life-threatening hemorrhage, uterine rupture, placental accreta spectrum, hysterectomy, and even mortality, accurate diagnosis and appropriate management of this condition are essential. This review focuses on the etiology, incidence, clinical diagnosis, and management of CSEPs.

Cesarean Scar Pregnancy: A systematic review on expectant management

A Cesarean Scar Pregnancy (CSP) is a variant of uterine ectopic pregnancy defined by full or partial implantation of the gestational sac in the scar of a previous cesarean section. The continuous increase of Cesarean Deliveries is causing a parallel increase in CSP and its complications. Considering its high morbidity, the most usual recommendation has been termination of pregnancy in the first trimester; however, several cases progress to viable births. The aim of this systematic review is to evaluate the outcome of CSP managed expectantly and understand whether sonographic signs could correlate to the outcomes. An online-based search of PubMed and Cochrane Library Databases was used to gather studies including women diagnosed with a CSP who were managed expectantly. The description of all cases was analysed by the authors in order to obtain information for each outcome. 47 studies of different types were retrieved, and the gestational outcome was available in 194 patients. Out of these, 39 patients (20,1%) had a miscarriage and 16 (8,3%) suffered foetal death. 50 patients (25,8%) had a term delivery and 81 (41,8%) patients had a preterm birth, out of which 27 (13,9%) delivered before 34 weeks of gestation. In 102 (52,6%) patients, a hysterectomy was performed. Placenta Accreta Spectrum (PAS) was a common disorder among CSP and was linked to a higher rate of complications such as foetal death, preterm birth, hysterectomy, haemorrhagic morbidity and surgical complications. Some of the analysed articles showed that sonographic signs with specific characteristics, such as type II and III CSP classification, Crossover Sign - 1, "In the niche" implantation and lower myometrial thickness could be related to worse outcomes of CSP. This article provides a good understanding of CSP as an entity that, although rare, presents with a high rate of relevant morbidity. It is also understood that pregnancies with confirmed PAS had an even higher rate of morbidity. Some sonographic signs were shown to predict the prognosis of these pregnancies and further investigation is necessary to validate one or more signs so they can be used for a more reliable counselling of women with CSP.

Other treatments for CSP

Caesarean scar pregnancy (CSP) is an increasingly common clinical conundrum. The non-curettage surgical management of CSP can be categorised into hysteroscopic, vaginal, laparoscopic, and open removal modalities and the choice of treatment is surgeon-dependent. A systematic review of original studies reporting surgical treatment outcomes of CSP until March 2023 was conducted to evaluate the non-curettage surgical management of this highly morbid condition. A total of 60 studies of mostly weak methodological quality were identified involving 6720 CSP cases. Success rates were generally high across all treatment modalities although highest in vaginal and laparoscopic excisional approaches. Morbidity was most associated with haemorrhage although unplanned hysterectomy rates remained low across all treatment groups. Subsequent pregnancies are associated with morbidity despite being underreported and the impact of CSP treatment on future pregnancy is poorly understood. Substantive study heterogeneity precludes meta-analyses of pooled data and treatment superiority has not been demonstrated.

Imaging in gynecological disease (25): clinical and ultrasound characteristics of intramural pregnancy

OBJECTIVE

To describe the clinical and sonographic characteristics of intramural pregnancy, as well as the available management options and treatment outcomes.

METHODS

This was a retrospective single-center study of consecutive patients with a sonographic diagnosis of intramural pregnancy between November 2008 and November 2022. An intramural pregnancy was diagnosed on ultrasound when a pregnancy was implanted within the uterine corpus, above the level of the internal cervical os and separate from the interstitial section of the Fallopian tube, and extended beyond the decidual-myometrial junction. Clinical, ultrasound, relevant surgical and histological information and outcomes were retrieved from each patient's record and analyzed.

RESULTS

Eighteen patients were diagnosed with an intramural pregnancy during the study period. Their median age was 35 (range, 28-43) years and the median gestational age at diagnosis was 8 + 1 (range, 5 + 5 to 12 + 0) weeks. Vaginal bleeding with or without abdominal pain was the most common presenting symptom, recorded in eight patients. Nine (50%) patients had a partial and nine (50%) had a complete intramural pregnancy. Embryonic cardiac activity was present in eight (44%) pregnancies. The majority of pregnancies (n = 10 (56%)) were initially managed conservatively, including expectant management in eight (44%) cases, local injection of methotrexate in one (6%) and embryocide in one (6%). Conservative management was successful in nine of the 10 (90%) pregnancies, with a median time to serum human chorionic gonadotropin resolution of 71 (range, 35-143) days. One patient with an ongoing live pregnancy had an emergency hysterectomy for a major vaginal bleed at 20 weeks' gestation. No other patient managed conservatively experienced any significant complication. The remaining eight (44%) patients had primary surgical treatment, comprising transcervical suction curettage in seven (88%) of these cases, while one patient presented with uterine rupture and underwent emergency laparoscopy and repair.

CONCLUSIONS

We describe the ultrasound features of partial and complete intramural pregnancy, demonstrating key diagnostic features. Our series suggests that, when intramural pregnancy is diagnosed before 12 weeks' gestation, it can be managed either conservatively or by surgery, with preservation of reproductive function in most women. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

Single-dose methotrexate-based protocol for the treatment of caesarean scar pregnancy and successive pregnancy outcomes

The incidence of caesarean scar pregnancy (CSP) increases in recent years. Yet, the best mode of treatment and its effects on successive pregnancies is not well established. The aim of this study was to investigate the success rate of single-dose methotrexate (MTX) in the management of CSP, and the outcomes of subsequent pregnancies in a retrospective cohort study. All women who were treated for CSPs between the years 2011 and 2019 were included. Treatment included systemic MTX and ultrasound-guided needle aspiration (UGNA) in cases with active foetal heartbeat. Overall, 34 women were diagnosed with CSP, of whom 31 were treated with systemic MTX. Twelve patients (38.7%) needed additional curettage or hysteroscopy. The only identified risk factor for failure of MTX-based treatment was time interval between the previous caesarean delivery and CSP (22 vs 34 months, p = 0.04). Twelve women had a subsequent pregnancy. Five pregnancies ended in term delivery, three in preterm delivery, three in abortion and one woman had a recurrent CSP. The study conclusion is that a single dose MTX with UGNA in cases of active heartbeat is an effective mode of treatment in cases of CSP with good sequential pregnancy outcomes. Longer time interval from the previous caesarean delivery was identified as a risk factor for failure of conservative management.

Surgical evacuation of cesarean scar ectopic pregnancies

Cesarean scar ectopic pregnancy is associated with significant maternal morbidity, including severe hemorrhage, need for the blood transfusion and hysterectomy. Early diagnosis is therefore key in ensuring timely management, with consensus being that treatment before 9 weeks of gestation leads to reduced morbidity. There is no universally adopted management protocol for cesarean scar ectopic pregnancy, but surgical management generally has a higher success rate than medical management. The primary surgical treatment modalities are suction evacuation versus resection of the pregnancy via multiple routes. Adjuncts that have been shown to successfully minimize bleeding with surgical management include cervical cerclage, balloon catheter, and uterine artery embolization. However, there remains a lack of high-quality evidence regarding what is the best surgical treatment option for cesarean scar ectopic pregnancy, and therefore it is essential that clinicians provide tailored management to patients considering the presenting symptoms and local expertise with various surgical techniques.

Definition and diagnosis of cesarean scar ectopic pregnancies

Cesarean scar ectopic pregnancy is a rare type of ectopic pregnancy, where the pregnancy implants into a myometrial defect caused by a cesarean scar. Its incidence is predicted to increase, given the global increase in cesarean deliveries. As most cesarean scar ectopic pregnancies present as failing pregnancies or patients choose termination of pregnancy, there are limited data on their natural history. However, early first trimester diagnosis is essential, given the associated significant maternal morbidity. Transvaginal sonography is generally considered to be the optimal method for diagnosing cesarean scar ectopic pregnancy. There is no evidence that MRI adds to the diagnostic accuracy, and it is therefore not recommended for routine evaluation of cesarean scar ectopic pregnancy. There is no agreed reference standard for the diagnosis of cesarean scar ectopic pregnancy; therefore, the validity of several proposed sonographic diagnostic criteria reported by different authors remains unknown. There are also various suggested classification systems for cesarean scar ectopic pregnancy, which divide them in differet types. However, the proposals are very heterogeneous, and superiority of one classification system over another is yet to be established.

Subsequent fertility after cesarean scar pregnancy: a retrospective analysis

BACKGROUND

Cesarean scar pregnancy (CSP) refers to the implantation and growth of the gestational sac at a uterine scarring site due to a previous cesarean section. The effects of CSP on subsequent fertility have emerged as a clinical issue of importance in gynecology and obstetrics in China owing to the increasing rate of cesarean section over the past 30 years in combination with the abolition of the national family planning policy, allowing for subsequent pregnancies. Therefore, we aimed to investigate the effects of CSP treatment on subsequent fertility and pregnancy outcomes.

METHODS

The study consecutively enrolled 499 women treated for CSP at Taizhou Hospital between January 2009 and December 2018. The study outcomes were the rate of secondary infertility and pregnancy outcomes. Clinical information was collected at the time of admission for CSP treatment. Information on subsequent fertility and pregnancy outcomes was collected via telephonic follow-up.

RESULTS

Among the 499 women who met the inclusion criteria for CSP, 48 were lost to follow-up. Most women (74.9%, 338/451) did not express the desire for a subsequent pregnancy after CSP treatment. Among the 113 women who initially desired a subsequent pregnancy, 62 finally abandoned fertility plans. Among the 51 women who pursued pregnancy, 48 pregnancies were recorded in 43 women, infertility secondary to CSP treatment was identified in 15.7% (8/51) of women, and 60.8% (31/51) of women achieved full-term pregnancy, with placenta accreta spectrum identified in two women, one requiring a hysterectomy during cesarean section due to massive bleeding. Among the 16 women treated with uterine artery embolization combined with uterine aspiration and 18 women treated by ultrasound-guided local lauromacrogol injection combined with uterine aspiration, a successful full-term pregnancy rate of 68.8% (11/16) and 88.9% (16/18), respectively, was achieved. There were five cases of recurrent CSP among all 76 pregnancies (6.6%).

CONCLUSION

Over a long-term follow-up of women after CSP treatment, a high successful fertility rate was identified, with also an increased CSP recurrence rate. Uterine artery embolization combined with uterine aspiration and ultrasound-guided local lauromacrogol injection combined with uterine aspiration showed high rates of successful post-treatment fertility and pregnancy.

Safe Service Delivery of a Complex Early Pregnancy Problem: Caesarean Scar Pregnancy

Caesarean Scar Pregnancy (CSP) is an ectopic pregnancy with implantation into the niche of the uterine scar. We aimed to describe the local management of consecutive cases of CSP to develop a standard operating procedure (SOP). Between December 2019 and June 2022, there were 19,100 maternities. Of these, 23 were CSPs in 19 patients. Median BMI was 29 (range 20.5-52), median number of Caesarean deliveries (CS) was 2 (range 1-4) and 7/23 (30%) were cigarette smokers. At diagnosis, 9/23 were live pregnancies, 3/23 were retained products of conception (RPOC), 9/23 were pregnancies of uncertain viability (PUV), and 2/23 were non-viable. In six, the initial management was expectant, surgical suction evacuation with transrectal ultrasound guidance in 16, and one had a hysterectomy. The median blood loss was 100 mL (range 50-2000 mL). Two patients (9%) required a blood transfusion. Median hospital stay was 1 day (range 0-4). At follow-up after 10 weeks, no patients had an ongoing haematoma, and one had significant RPOC electing hysterectomy. Eight women were known to have 9 subsequent pregnancies (recurrent CSP n = 4, livebirth n = 2, miscarriage n = 2, tubal ectopic n = 1). Outcomes as rated by low blood loss, short hospital stay, and rare need for further intervention were favorable. Factors associated included prompt ultrasonographic diagnosis, availability of transrectal ultrasound guided surgery, and specialist follow-up, which form the basis of the SOP.

Caesarean scar pregnancy: diagnosis, natural history and treatment

PURPOSE OF REVIEW

This review aims at summarizing the latest evidence on diagnosis, natural history and management of caesarean scar pregnancy (CSP).

RECENT FINDINGS

CSP can result in maternal morbidity from major haemorrhage, uterine rupture, placenta accreta spectrum disorders and hysterectomy. Classification of the CSP types, presence of fetal heart activity, gestational age and residual myometrial thickness seem to influence rates of ongoing pregnancy, subsequent development of placenta accreta with expectant management, as well as success and complication rates associated with various methods of pregnancy termination. Expectant management may be appropriate in certain good prognosis cases, such as absent fetal heart activity or when the myometrial layer at the implantation site is relatively thick. Surgical treatments are typically associated with higher success rates, but seem to result in severe haemorrhage more frequently than medical treatments, which have higher failure rates. Although other treatment modalities are available, in general, the size and quality of evidence to guide care provision in CSP is very poor.

SUMMARY

CSP can be associated with severe maternal morbidity but can also lead to a livebirth. There is currently a lack of good-quality evidence to predict the outcome of CSP and provide informed and evidence-based care.

Society for Maternal-Fetal Medicine Consult Series #63: Cesarean scar ectopic pregnancy

Cesarean scar ectopic pregnancy is a complication in which an early pregnancy implants in the scar from a previous cesarean delivery. This condition presents a substantial risk for severe maternal morbidity and mortality because of challenges in securing a prompt diagnosis. Ultrasound is the primary imaging modality for cesarean scar ectopic pregnancy diagnosis, although a correct and timely determination can be difficult. Surgical, medical, and minimally invasive therapies have been described for cesarean scar ectopic pregnancy management, but the optimal treatment is unknown. Patients who decline treatment of a cesarean scar ectopic pregnancy should be counseled regarding the risk for severe morbidity. The following are the Society for Maternal-Fetal Medicine recommendations: we recommend against expectant management of cesarean scar ectopic pregnancy (GRADE 1B); we suggest that operative resection (with transvaginal or laparoscopic approaches when possible) or ultrasound-guided uterine aspiration be considered for the surgical management of cesarean scar ectopic pregnancy and that sharp curettage alone be avoided (GRADE 2C); we suggest intragestational methotrexate for the medical treatment of cesarean scar ectopic pregnancy, with or without other treatment modalities (GRADE 2C); we recommend that systemic methotrexate alone not be used to treat cesarean scar ectopic pregnancy (GRADE 1C); in patients who choose expectant management and continuation of a cesarean scar ectopic pregnancy, we recommend repeated cesarean delivery between 34 0/7 and 35 6/7 weeks of gestation (GRADE 1C); we recommend that patients with a cesarean scar ectopic pregnancy be advised on the risks of another pregnancy and counseled regarding effective contraceptive methods, including long-acting reversible contraception and permanent contraception (GRADE 1C).

Definition and sonographic reporting system for Cesarean scar pregnancy in early gestation: modified Delphi method

OBJECTIVE

To develop a standardized sonographic evaluation and reporting system for Cesarean scar pregnancy (CSP) in the first trimester, for use by both general gynecology and expert clinics.

METHODS

A modified Delphi procedure was carried out, in which 28 international experts in obstetric and gynecological ultrasonography were invited to participate. Extensive experience in the use of ultrasound to evaluate Cesarean section (CS) scars in early pregnancy and/or publications concerning CSP or niche evaluation was required to participate. Relevant items for the detection and evaluation of CSP were determined based on the results of a literature search. Consensus was predefined as a level of agreement of at least 70% for each item, and a minimum of three Delphi rounds were planned (two online questionnaires and one group meeting).

RESULTS

Sixteen experts participated in the Delphi study and four Delphi rounds were performed. In total, 58 items were determined to be relevant. We differentiated between basic measurements to be performed in general practice and advanced measurements for expert centers or for research purposes. The panel also formulated advice on indications for referral to an expert clinic. Consensus was reached for all 58 items on the definition, terminology, relevant items for evaluation and reporting of CSP. It was recommended that the first CS scar evaluation to determine the location of the pregnancy should be performed at 6-7 weeks' gestation using transvaginal ultrasound. The use of magnetic resonance imaging was not considered to add value in the diagnosis of CSP. A CSP was defined as a pregnancy with implantation in, or in close contact with, the niche. The experts agreed that a CSP can occur only when a niche is present and not in relation to a healed CS scar. Relevant sonographic items to record included gestational sac (GS) size, vascularity, location in relation to the uterine vessels, thickness of the residual myometrium and location of the pregnancy in relation to the uterine cavity and serosa. According to its location, a CSP can be classified as: (1) CSP in which the largest part of the GS protrudes towards the uterine cavity; (2) CSP in which the largest part of the GS is embedded in the myometrium but does not cross the serosal contour; and (3) CSP in which the GS is partially located beyond the outer contour of the cervix or uterus. The type of CSP may change with advancing gestation. Future studies are needed to validate this reporting system and the value of the different CSP types.

CONCLUSION

Consensus was achieved among experts regarding the sonographic evaluation and reporting of CSP in the first trimester. © 2021 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

The Efficacy and Health Economics of Different Treatments for Type 1 Cesarean Scar Pregnancy

Objectives: To evaluate the efficacy and health economics of four treatments for type 1 cesarean scar pregnancy (CSP).

Methods: From January 2009 to December 2018, 326 patients diagnosed with type 1 CSP were examined, among whom 31 received ultrasound-guided local injection of methotrexate (local injection group), 160 patients received uterine artery embolization combined with suction aspiration (UAE group), 25 patients received ultrasound-guided suction aspiration (aspiration group) and 90 received ultrasound-guided local injection of lauromacrogol combined with suction aspiration (lauromacrogol group). Clinical data and outcomes were analyzed. The decision tree model was used to compare the economics of four treatments.

Results: The success rate of the local injection group was 71.0% (22/31), which was significantly different from 98.8% (158/160) of the UAE group and 100.0% (90/90) of the lauromacrogol group. The success rate of the aspiration group was 92.0% (23/25), which was significantly lower than that of the lauromacrogol group. The cost-effectiveness ratio was 1,876.53 yuan for the aspiration group, 2,164.63 yuan for the lauromacrogol group, 4,383.56 yuan for the local injection group, and 7,850.81 yuan for the UAE group. The Incremental cost effectiveness ratio (ICER) of the lauromacrogol group to the aspiration group was 5,477.75 yuan, indicating that if the willing to pay of patients was higher than 5,477.75 yuan, the lauromacrogol group had a cost-effectiveness advantage in treating type 1 CSP, compared to aspiration group. On the contrary, aspiration group has a higher cost-effectiveness advantage. The ICER of the lauromacrogol group to the local injection group or the UAE group were both less than 0, indicating that local injection group and UAE group was not cost-effective in the treatment of type 1 CSP.

Conclusion: For type 1 CSP, the ultrasound-guided local injection of lauromacrogol combined with suction aspiration and ultrasound-guided suction aspiration, are effective and economical, and the choice between the two can be based on the patient’s willing to pay.

Evaluation of the necessity of laparoscopic repair of a uterine scar defect for cesarean scar pregnancy

Objective

This study aimed to determine the risk factors associated with the necessity of laparoscopic scar defect repair for cesarean scar pregnancy (CSP).

Methods

We retrospectively analyzed 237 patients with CSP who were treated by ultrasound-guided suction curettage and/or laparoscopy in our hospital from April 2012 to November 2019. A total of 199 of these patients underwent ultrasound-guided suction curettage without uterine scar defect repair, while 38 of these patients underwent laparoscopic resection and uterine scar defect repair. We analyzed various clinical variables and compared the efficacy of treatment between the two groups.

Results

Gestational age, the maximum transverse diameter (MTD) of the gestational sac, myometrial thickness, the operation time, intraoperative blood loss, and the duration of the hospital stay were significantly different between the two groups. Gestational age, the MTD of the gestational sac, and myometrial thickness were independent risk factors for laparoscopic repair.

Conclusions

Gestational age, the MTD of the gestational sac, and myometrial thickness are important factors associated with the necessity for laparoscopic repair of a uterine scar defect.

Laparoscopic Isthmocele Repair: Efficacy and Benefits before and after Subsequent Cesarean Section

OBJECTIVE

To evaluate the effect of laparoscopic isthmocele repair on isthmocele-related symptoms and/or fertility-related problems. The residual myometrial thickness before and after subsequent cesarean section was also evaluated.

DESIGN

Retrospective, case series.

SETTING

Public university hospital.

POPULATION

Women with isthmocele (residual myometrium < 5 mm) complaining of abnormal uterine bleeding, chronic pelvic pain or secondary infertility not otherwise specified.

METHODS

Women's complaints and the residual myometrium were assessed pre-operatively and at three to six months post-operatively. In patients who conceived after surgery, the latter was measured at least six months after delivery by cesarean section.

MAIN OUTCOME MEASURES

Resolution of the main symptom three to six months after surgery and persistence of laparoscopic repair benefits after subsequent cesarean section were considered as primary outcome measures.

RESULTS

Overall, 31 women underwent laparoscopic isthmocele repair. The success rates of the surgery as improvement of abnormal uterine bleeding, chronic pelvic pain and secondary infertility were 71.4% (10 of 14), 83.3% (10 of 12) and 83.3% (10 of 12), respectively. Mean residual myometrial thickness increased significantly from 1.77 mm pre-operatively to 6.67 mm, three to six months post-operatively. Mean myometrial thickness in patients who underwent subsequent cesarean section (N = 7) was 4.49 mm. In this sub-group, there was no significant difference between the mean myometrial thickness measured after the laparoscopic isthmocele repair and that measured after the subsequent cesarean section. None of these patients reported recurrence of their symptoms after delivery.

CONCLUSION

Our findings suggest that the laparoscopic isthmocele excision and repair is an appropriate approach for the treatment of isthmocele-related symptoms when done by skilled laparoscopic surgeons. The benefit of this new surgical approach seems to persist even after a subsequent cesarean section. Further investigations and prospective studies are required to confirm this finding.

Diagnosis and Management of Cesarean Scar Pregnancy and Placenta Accreta Spectrum: Case Series and Review of the Literature

With an increased cesarean delivery rate, the incidence of abnormal placentation is steadily rising, and it is estimated to be around 1.7 per 1000 pregnancies for cesarean scar pregnancy and 1 per 500 pregnancies for placenta accreta spectrum disorder. Current evidence considers cesarean scar pregnancy and placenta accreta spectrum as being the same condition, with different aspects, of the same spectrum, having higher risks with advancing gestation. We present 7 cases, diagnosed and managed in our hospital, at different gestational ages. Early diagnosis is essential for appropriate counseling and subsequent management, and an ultrasound examination is the reference standard for diagnosis. Screening for an abnormally implanted placenta in the first trimester of pregnancy might improve the perinatal outcome and reduce maternal morbidity and mortality.

Management of heterotopic cesarean scar pregnancy with preservation of intrauterine pregnancy: A case report

BACKGROUND

Heterotopic cesarean scar pregnancy (HCSP) is very rare and has a high risk of massive uterine bleeding. Preservation of concurrent intrauterine pregnancy (IUP) is one of the great challenges in the management of HCSP. No universal treatment protocol has been established when IUP is desired to be preserved.

CASE SUMMARY

We report a case of HCSP at 8⁺ wk gestation in a 34-year-old woman with stable hemodynamics. A two-step intervention was applied. Selective embryo aspiration was performed first, and surgical removal of ectopic gestational tissue by suction and curettage was performed 2 d later. Both steps were performed under ultrasound guidance. The patient had an uneventful course, and a healthy baby was delivered at 34⁺⁶ wk gestation.

CONCLUSION

Selective embryo aspiration followed by suction and curettage was successful in the preservation of IUP in the management of HCSP. This approach is an alternative option for HCSP in the first trimester when the IUP is desired to be preserved.

Risk prediction of major haemorrhage with surgical treatment of live cesarean scar pregnancies

OBJECTIVE

To evaluate the association between demographic and ultrasound variables and major intra-operative blood loss during surgical transcervical evacuation of live caesarean scar pregnancies.

STUDY DESIGN

This was a retrospective cohort study conducted in a tertiary referral center between 2008 and 2019. We included all women diagnosed with a live caesarean scar ectopic pregnancy who chose to have surgical management in the study center. A preoperative ultrasound was performed in each patient. All women underwent transcervical suction curettage under ultrasound guidance. Our primary outcome was the rate of postoperative blood transfusion. The secondary outcomes were estimated intra-operative blood loss (ml), rate of retained products of conception, need for repeat surgery, need for uterine artery embolization and hysterectomy rate. Descriptive statistics were used to describe the variables. Univariate and multivariable logistic regression models were constructed using the relevant covariates to identify the significant predictors for severe blood loss.

RESULTS

During the study period, 80 women were diagnosed with a live caesarean scar pregnancy, of whom 62 (78%) opted for surgical management at our center. The median crown-rump length was 9.3 mm (range 1.4-85.7). Median blood loss at the time of surgery was 100 ml (range, 10-2300), and six women (10%; 95%CI 3.6-20) required blood transfusion. Crown-rump length and presence of placental lacunae were significant predictive factors for the need for blood transfusion and blood loss > 500 ml at univariate analysis (p < .01); on multivariate analysis, only crown-rump length was a significant predictor for need for blood transfusion (OR = 1.072; 95% CI 1.02-1.11). Blood transfusion was required in 6/18 (33%) cases with the crown-rump length ≥ 23 mm (≥9⁺⁰ weeks of gestation), but in none of 44 women presenting with a crown-rump length < 23 mm (p < .01).

CONCLUSION

The risk of severe intraoperative bleeding and need for blood transfusion during or after surgical evacuation of live caesarean scar pregnancies increases with gestational age and is higher in the presence of placental lacunae. One third of women presenting at ≥ 9 weeks of gestation required blood transfusion and their treatment should be ideally arranged in specialized tertiary centers.

Hysteroscopic treatment and reproductive outcomes in cesarean scar pregnancy: experience at a single institution

OBJECTIVE

To study the risk factors leading to type II/III cesarean scar pregnancy and evaluate the efficacy of hysteroscopic treatment and subsequent reproductive outcomes.

DESIGN

Retrospective study from 2013 to 2018.

SETTING

Inpatient samples.

PATIENT(S)

A total of 439 patients with cesarean scar pregnancy received hysteroscopic treatment. They were grouped according to the type of surgery as hysteroscopy combined with dilation and curettage, systemic methotrexate followed by hysteroscopy combined with dilation and curettage, and uterine artery embolization or laparoscopic ligation of bilateral uterine arteries followed by hysteroscopy combined with dilation and curettage. Cesarean scar pregnancy was classified as types I, II, and III on the basis of the relationship between the gestational sac and myometrial thickness by ultrasound.

INTERVENTION(S)

Not applicable.

MAIN OUTCOME MEASURE(S)

Risk factors leading to type II/III cesarean scar pregnancy. The success of hysteroscopic treatment as well as favorable reproductive outcomes.

RESULT(S)

The significant variables were multiple parity, prior cesarean section (CS), hysteroscopic therapy, and dilation and curettage after the last CS between type I and type II/III. There were significant differences among the three groups in symptoms, largest diameter of the gestational sac, presence of fetal heartbeat, myometrial thickness, type of cesarean scar pregnancy, blood loss, length of hospital stay, and expense. The rates of complications and success were 8.2% and 93.6%, respectively. Thirty-seven women conceived again, and 22 women completed a term pregnancy with no uterine rupture. The recurrence rate of cesarean scar pregnancy was 10.8%.

CONCLUSIONS

The type of cesarean scar pregnancy is related to the rates of multiple parity, cesarean deliveries, and dilation and curettage procedures after the last CS. Hysteroscopic therapy is a safe and effective surgical approach with a low risk of subsequent ectopic pregnancy.

Recurrent Cesarean scar pregnancy: case series and literature review

OBJECTIVES

To determine the rate of recurrent Cesarean scar pregnancy (CSP) in our clinical practices and to evaluate whether the mode of treatment of a CSP is associated with the risk of recurrent CSP, as well as to review the published literature on recurrent CSP.

METHODS

We performed a retrospective search of our six obstetric and gynecological departmental ultrasound databases for all CSPs and recurrent CSPs between 2010 and 2019. We extracted various data, including number of CSPs with follow-up, number of cases attempting and number achieving pregnancy following treatment of CSP and number of recurrent CSPs, as well as details of the treatment of the original CSP. After analyzing the clinical data, we evaluated whether the mode of treatment terminating the previous CSP was associated with the risk of recurrent CSP. We also performed a PubMed search for: 'recurrent Cesarean scar pregnancy' and 'recurrent Cesarean scar ectopic pregnancy'. Articles were reviewed for year of publication, and extraction and analysis of the same data as those obtained from our departmental databases were performed.

RESULTS

Our database search identified 252 cases of CSP. The overall rate of clinical follow-up ranged between 71.4% and 100%, according to treatment site (mean, 90.9%). Among these, 105 women had another pregnancy after treatment of the previous CSP. Of these, 36 (34.3%) pregnancies were recurrent CSP, with 27 women having a single recurrence and three women having multiple recurrences, one with two, one with three and one with four. We did not find any particular single or combination treatment mode terminating the previous CSP to be associated with recurrent CSP. The literature search identified 17 articles that yielded sufficient information for us to evaluate their reported prevalence of recurrent CSP. These reported 1743 primary diagnoses of CSP, of which 944 had reliable follow-up. Data were available for 489 cases that attempted to conceive again after treatment of a previous CSP, and on the 327 pregnancies achieved. Of these, 67 (20.5%) were recurrent CSP.

CONCLUSIONS

On the basis of our pooled clinical data and review of the literature, recurrent CSP is apparently more common than was previously assumed based upon mostly single-case reports or series with few cases. This should be borne in mind when counseling patients undergoing treatment for CSP regarding their risk of recurrence. We found no obvious causal relationship or association between the type of treatment of the previous CSP and recurrence of CSP. Patients who become pregnant after treatment of a CSP should be encouraged to have an early (5-7-week) first-trimester transvaginal scan to determine the location of the gestation. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.

A Comparison of Ultrasound Guided Curettage With and Without Uterine Artery Embolization on Controlling Intraoperative Blood Loss for a Cesarean Scar Pregnancy Treatment: Study Protocol for a Randomized Clinical Trial

Introduction

Cesarean scar pregnancy affects 6% of all ectopic pregnancies in women with prior cesarean section, and there is currently no consensus on the optimal treatment. Options of surgical treatment have a risk of intraoperative blood loss; therefore, uterine artery embolization (UAE) has been considered as an option of reducing intraoperative blood loss. However, UAE may be overused in clinical practice, especially in China. We present this protocol for a randomized clinical trial investigating the necessity of performing UAE for cesarean scar pregnancy, in combination with surgical suction curettage, taking into account the different subtypes of cesarean scar pregnancy. We recently developed a risk-scoring system (QRS) to estimate intraoperative blood loss, with 93.8% sensitivity and 6.3% false negative. Through this randomized clinical trial, we will retrospectively validate the QRS score on predicting intraoperative blood loss.

Methods and Analysis

We propose undertaking a randomized clinical trial sequentially recruiting 200 patients. All the patients will randomly receive ultrasound guided curettage with or without UAE. Data on the subtypes of cesarean scar pregnancy (Types 1 and II and III) detected by ultrasound will be collected before operation. The score on estimating intraoperative blood loss assessed by our recently developed quantitative risk-scoring system (QRS) will be collected before the operation. We will primarily compare the duration of the operation, intraoperative blood loss, and complications between the two groups. We will also retrospectively analyze the association of subtypes of cesarean scar pregnancy and the options of treatment and validate the QRS score. Outcomes of subsequent pregnancy within the 2-year follow-up will be secondary outcomes.

Trial Registration Number

[website], identifier ChiCTR2100041654.

Successful hysteroscopy and curettage of a caesarean scar ectopic pregnancy

Caesarean scar ectopic pregnancies are the rarest type of ectopic pregnancy. The optimum management regime is not yet established. We report the case of a 39-year-old woman who presented at 11 weeks gestation with painless vaginal bleeding, having had 2 previous caesarean sections. Ultrasound revealed a gestational sac within the caesarean scar niche. On follow-up, her serial ß human chorionic gonadotropin (ßHCG) measurements fell significantly. The woman initially opted for conservative management but subsequently required surgical management. Hysteroscopy demonstrated a sac within the caesarean scar which was successfully evacuated by ultrasound-guided suction curettage, with no complications. Caesarean scar ectopic pregnancies are becoming increasingly common. Diagnosis is primarily through ultrasound using specified criteria. Management may be conservative, medical or surgical excision depending on the clinical circumstances. Hysteroscopy and suction curettage is an effective therapeutic option for caesarean scar ectopic management.

Myometrial thickness overlying cesarean scar pregnancy is significantly associated with isthmocele formation in the third month of the postoperative period

Objective:

To determine some associated factors for isthmocele formation 3 months after the treatment of cesarean scar pregnancy (CSP).

Materials and Methods:

This is a prospective consecutive case series of CSP managed by fertility preservation modalities at a single tertiary care center from May 2016 to March 2019 (n=95). Patients with a diagnosis of CSP were identified and followed prospectively to collect data on the patients’ demographics; detailed medical, surgical, and social history; symptoms; imaging and laboratory parameters at the time of CSP diagnosis and during treatment; treatment modalities, myometrial thickness; and outcomes in terms of isthmocele formation.

Results:

Mean myometrial thickness overlying scar pregnancy was significantly lower in the group with isthmocele formation, and the mean gestational age of scar pregnancy was also significantly lower in the group with isthmocele formation following treatment of scar pregnancy (p<0.05). Multivariate regression analysis was conducted to determine associations between certain variables and isthmocele development, which revealed that the gestational age of scar pregnancy and myometrial thickness were significantly associated with isthmocele formation.

Conclusion:

Myometrial thickness and gestational age of scar pregnancy were significantly associated with isthmocele formation 3 months after treatment.

Laparoscopic management of cesarean scar pregnancy: Report of two cases with video-presentation of different operative techniques and literature review

Cesarean scar pregnancy (CSP) is a rare form of ectopic pregnancy. We present two different techniques of laparoscopic management of CSP, with the concomitant repair of the coexisting uterine isthmocele. The first case is a combination of diagnostic hysteroscopy and laparoscopic extraction of conception products, and the second technique is a combination of laparoscopy and guided Dilation & Curettage. We also conducted a thorough review of the literature to present all cases of laparoscopic treatment of CSP, focusing on the surgical technique, the operation outcome, and the future pregnancies. Laparoscopy is a potential effective treatment of CSP.

The use of intra-operative ultrasound in gynecological surgery: a review

Ultrasound is a readily available, safe and portable imaging modality that is widely applied in gynecology. However, there is limited guidance for its use intra-operatively especially with complex gynecological procedures. This narrative review examines the existing literature published on the use of intraoperative ultrasound (IOUS) in benign gynecology and in gynecological oncology. We searched for the following terms: ‘intraoperative,’ ‘ultrasonography,’ ‘gynecology’ and ‘oncology’ using Pubmed/Medline. IOUS can minimize complications and facilitate difficult benign gynecological procedures. There is also a role for its use in gynecological oncology surgery and fertility-sparing surgery. The use of IOUS in gynecological surgery is an emerging field which improves visualization in the surgical field and aids completion of minimally invasive techniques.

Ultrasound (US) is a portable and safe imaging method that uses high frequency sound waves to visualize structures within the body. While most US examinations are done outside the body there is an emerging field which uses US devices within the body during surgery to aid complex procedures. This review examines the published literature on this technique in benign gynecology and in gynecological oncology. This review demonstrates the use of intraoperative US improves visualization and minimizes surgical complications.

Is suction curettage an effective treatment alternative for cesarean scar pregnancies?

OBJECTIVES

The study aims to evaluate the success rate of suction curettage (SC) as a first line treatment with or without use of foley balloon tamponade for cesarean scar pregnancy (CSP) and to determine the risk factors for failure of treatment.

STUDY DESIGN

The study was retrospective and included 36 CSP cases who underwent SC for treatment. Presence of pain with active bleeding and > 10 weeks of gestation were taken as the exclusion criterion. The procedure was performed under sonographic guidance. After the procedure, in patients who had a hemorrhage foley catheter was inserted into the uterine cavity. SC failure was defined as a requirement of secondary intervention. CSP types, myometrial thickness in the scar area, fetal cardiac activity, initial Beta human chorionic gonadotropin levels (β-HCG), history of vaginal delivery were compared between successful and failed groups.

RESULT

Of 36 patients, 31 had favorable results with SC ± foley balloon tamponade. Success rate was found to be 86 % (31/36) as the first line therapy. Foley catheter was applied for 23 patients, among them, four were in the failed group and 19 were in the favorable group. In the failed group, two patients had emergent laparotomy, two had repeat SC the day after the initial treatment and one patient was treated with systemic MTX. Fetal cardiac activity and presence of embryonic pole were not different between the groups (p = 1.000, p = 0.829 respectively). Myometrial thickness in the failed group was less than the successful group, this difference was significant (p = 0.033). CSP types, initial β-HCG levels and history of vaginal delivery were not different between the groups (p = 0.149, p = 0.372 and p = 0.404 respectively).

CONCLUSION

SC may be considered as a first line therapy for CSPs, and and in patients complicated with hemorrhage foley balloon tamponade can be used easily. Thinner myometrium at previous cesarean scar can be considered as a risk factor for failure of SC in patients with CSP.

Subsequent Fertility in Women Treated for Caesarean Scar Pregnancy With Hysteroscopy: A 5-Year Follow-Up Descriptive Study in a Tertiary Hospital

OBJECTIVE

The outcomes of subsequent pregnancies and fertility in women with a history of caesarean scar pregnancy have not been well described. In this study, we followed up 149 women with a history of caesarean scar pregnancy and analysed the effect on their fertility.

METHODS

149 women with a history of caesarean scar pregnancy were followed up for five years. Of them, 53 women had unprotected sexual intercourse attempting to become pregnant again. Data including clinical parameters and treatment options at the time of diagnosis of caesarean scar pregnancy, and the outcomes in subsequent pregnancy were collected. In addition, a questionnaire about the menstrual cycle after treatment was voluntarily completed by these women.

RESULTS

Of the 53 women, 46 (84%) women had a subsequent pregnancy, while seven (14%) women did not. There was no association between the clinical parameters in previous caesarean scar pregnancy or treatment and future fertility. From the questionnaire, there was no difference seen in the length of the menstrual cycle and menses between the two groups. However, a higher number of women with light menstrual bleeding were seen in women without a subsequent pregnancy (67%), compared with women who did (28%). In addition, six women (13%) who had a subsequent pregnancy experienced foetus death in the first trimester.

CONCLUSION

We reported that 14% of women with a history of cesarean scar pregnancy did not have a subsequent pregnancy, after unprotected sexual intercourse for more than two years. Light menstrual bleeding after treatment may be associated with this adverse effect. Our findings need to be further investigated with large sample size.

Risk factors of persistent cesarean scar pregnancy after dilation and curettage: a matched case-control study

OBJECTIVES

To investigate the risk factors of persistent cesarean scar pregnancy (PCSP) after dilation and curettage (D&C).

MATERIALS AND METHODS

A retrospective, age-matched case-control study including 45 cases of PCSP patients after D&C was conducted between January 2013 and April 2018. For each case, 4 women who had been diagnosed with CSP and had the same age and same hospitalization period as the case group but no residual CSP tissue after D&C were selected as the controls (Control group, n = 180). Conditional logistic regression analysis was used to assess the risk factors of PCSP after D&C.

RESULTS

After conditional logistic regression, the 3 factors associated with PCSP after D&C were maximum diameter of CSP mass (or gestational sac) ≥4.5 cm (adjusted odds ratio [aOR] 6.51, 95% CI 1.39-30.47), myometrial thickness at the implantation site <2 mm (aOR 3.58, 95% CI 1.37-9.38) and a ≤66.42% decrease rate in β-hCG levels on the first day after D&C (aOR 18.58, 95% CI 5.80-59.57). ROC analysis showed that the indicator [(hCG₀-hCG₁)/hCG₀*100%] has a good predictive value for PCSP, and the area under the curve (AUC) is 0.745; when the cut-off value is equal to 66.42%, the indicator has the best predictive value, with a sensitivity of 82.2% and a specificity of 67.7%.

CONCLUSIONS

For these high-risk patients with PCSP, choosing individualized treatment options and proper management could reduce the incidence of PCSP.

Differential Diagnosis of Cesarean Scar Pregnancies and Other Pregnancies Implanted in the Lower Uterus by Ultrasound Parameters

Purpose

Cesarean scar pregnancy is an extremely rare type of ectopic pregnancy implanted in the myometrium at the site of a previous cesarean section scar. On the other hand, pregnancies are considered low implantations if they are identified in the lower third of the uterus without the sac implanted into the scar and have a better prognosis. Early diagnosis of both types of pregnancies can help avoid serious complications. This study is aimed at investigating the significance of transvaginal ultrasound in the differential diagnosis of cesarean scar pregnancies and pregnancies implanted in the lower uterus.

Methods

Ninety-three patients with an average age of 32.7 years (range, 24-43 years) were enrolled in this study, including 66 cesarean scar pregnancies and 27 other pregnancies implanted in the lower uterus, and they were examined by transvaginal ultrasound.

Results

We observed significant differences in the relationship between the cesarean sac and the scar, the source of the trophoblastic blood flow, and the thickness of the residual muscle between the cesarean scar pregnancy group and the lower uterus pregnancy group. We established the logistic model to improve the differential diagnosis of cesarean scar pregnancies and pregnancies implanted in the lower uterus.

Conclusions

Transvaginal ultrasound is recommended in early pregnancy, especially for patients who have undergone a previous cesarean section delivery.

Clinical Efficacy of Combined Hysteroscopic and Laparoscopic Surgery and Reversible Ligation of the Uterine Artery for Excision and Repair of Uterine Scar in Patients with Type II and III Cesarean Scar Pregnancy

Background

With the changes in China’s family planning policy, the incidence of cesarean scar pregnancy (CSP) significantly increased in recent years. The present study aimed to investigate the clinical efficacy of combined hysteroscopic and laparoscopic surgery and reversible ligation of the uterine artery for cesarean scar excision and repair in patients with type II and III CSP.

Material/Methods

This was a retrospective study of 173 patients with type II and III CSP. They were assigned to the hysteroscopy and laparoscopy group (group A), hysteroscopy group (group B), and curettage group (group C) according to the surgery they underwent. The surgical indicators (intraoperative bleeding volume and hospital stay), postoperative recovery (time of serum β-hCG returning to the normal, postoperative residual lesion, the thickness of the uterine scar, and recovery time of menstruation), and the postoperative complications were compared among the 3 groups.

Results

In patients with type II and III CSP, significant differences (P<0.05) were observed between group A vs. groups B and C in terms of the time of serum β-HCG returning to normal, postoperative residual lesions, the thickness of the uterine scar, and recovery time of menstruation, while there were no significant differences in intraoperative bleeding volume and postoperative hospital stay (P>0.05).

Conclusions

For patients with type II and III CSP, hysteroscopy and laparoscopy surgery and reversible ligation of the uterine artery achieved better clinical outcomes than hysteroscopy or curettage with respect to postoperative recovery. This could be suitable for patients with CSP and desire for fertility.

Association of hemorrhage at termination in caesarean scar pregnancy using the crossover sign of ultrasound image

PURPOSE

To analyze whether crossover sign (COS) can help predict the risk of bleeding during surgical evacuation in patients with caesarean scar pregnancy (CSP).

METHODS

This study retrospectively analyzed the clinical presentations, ultrasound images and treatment outcomes of patients with CSP. The relationship among the gestational sac, caesarean scar and the anterior uterine wall, defined as the COS, was analyzed to predict the risk of severe bleeding during surgical evacuation in these patients. All patients were categorized according to the relationship between the endometrial line and the superior-inferior diameter of the gestational sac into crossover sign-1 and crossover sign-2 groups. The Mann-Whitney U test was used to compare the data with non-normal distribution, and logistic regression analysis was performed to identify the correlates of severe bleeding.

RESULTS

A total of 74 patients were included. In COS-1 group (n = 21), 16 (76.19%) patients suffered heavy bleeding(≥200 mL) during surgical evacuation, while COS-2 group (n = 53) had only 1(11.89%) patient complaint of heavy bleeding (≥200 mL) (P < 0.01). Adverse surgical outcomes were more common in women with COS-1. Logistic regression analysis showed that COS-1 (OR, 7.93; 95% CI, 1.35-46.67) was independently associated with severe bleeding.

CONCLUSION

COS can help predict who has a higher risk of severe hemorrhage in patients with CSP and guide the clinical treatment selection for optimal management of this condition.

Society for Maternal-Fetal Medicine (SMFM) Consult Series #49: Cesarean scar pregnancy

Cesarean scar pregnancy is a complication in which an early pregnancy implants in the scar from a prior cesarean delivery. This condition presents a substantial risk for severe maternal morbidity because of challenges in securing a prompt diagnosis, as well as uncertainty regarding optimal treatment once identified. Ultrasound is the primary imaging modality for cesarean scar pregnancy diagnosis, although a correct and timely determination can be difficult. Surgical, medical, and minimally invasive therapies have been described for cesarean scar pregnancy management, but the optimal treatment is not known. Women who decline treatment of a cesarean scar pregnancy should be counseled regarding the risk for severe morbidity. The following are Society for Maternal-Fetal Medicine recommendations: We recommend against expectant management of cesarean scar pregnancy (GRADE 1B); we suggest operative resection (with transvaginal or laparoscopic approaches when possible) or ultrasound-guided vacuum aspiration be considered for surgical management of cesarean scar pregnancy and that sharp curettage alone be avoided (GRADE 2C); we suggest intragestational methotrexate for medical treatment of cesarean scar pregnancy, with or without other treatment modalities (GRADE 2C); we recommend that systemic methotrexate alone not be used to treat cesarean scar pregnancy (GRADE 1C); in women who choose expectant management and continuation of a cesarean scar pregnancy, we recommend repeat cesarean delivery between 34 0/7 and 35 6/7 weeks of gestation (GRADE 1C); we recommend that women with a cesarean scar pregnancy be advised of the risks of another pregnancy and counseled regarding effective contraceptive methods, including long-acting reversible contraception and permanent contraception (GRADE 1C).

Surgical management of first-trimester bleeding in a heterotopic caesarean scar pregnancy: A case report and review of literature

Heterotopic caesarean scar pregnancy (HCSP) is very rare, with only 24 cases reported in the literature. Optimal management is yet to be determined. We describe a 38-year-old woman, G2P1, who presented with vaginal bleeding and haemodynamic instability at 9 weeks of gestation in a HCSP. She was managed with ultrasound-guided lower-segment curettage and bilateral uterine artery ligation. The patient's pregnancy was complicated by preterm rupture of membranes and shortened cervix at 27 weeks of gestation. This necessitated preterm delivery, with subsequent neonatal death attributed to extreme prematurity. The patient later had a spontaneously conceived pregnancy, which was complicated by placenta percreta requiring elective caesarean hysterectomy at 34 weeks of gestation. This is, to our knowledge, the first case report describing preservation of the intrauterine pregnancy and future fertility in a patient with a HCSP and significant first-trimester bleeding. We suggest that ultrasound-guided lower-segment curettage may be a suitable management option for carefully selected patients with HCSP in a tertiary centre. All patients with HCSP require judicious counselling regarding the risk of morbidly adherent placenta and need for tertiary-level obstetric management in future pregnancies.

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First trimester bleeding in heterotopic caesarean scar pregnancy

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Surgical management of heterotopic caesarean scar pregnancy

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Ultrasound guided curettage with preservation of concurrent intrauterine pregnancy

Caesarean scar ectopic pregnancy: Experience from an Australian tertiary centre

BACKGROUND

Despite the rising incidence of caesarean scar pregnancy (CSP), as yet there are no consensus or evidence-based guidelines for management.

AIMS

To review diagnosis, treatment and management of all women with CSP over a 5 year period at Mater Mothers' Hospital, Brisbane, Australia.

MATERIALS AND METHODS

Retrospective cohort study of CSP between 2013-2018. Data reviewed included demographics, presenting symptoms, gestational age, ultrasound findings, human chorionic gonadotrophin levels, treatment success, complications, and if available, subsequent pregnancy outcomes.

RESULTS

Twenty-eight women were treated for CSP during the study period. Initial diagnosis was delayed in ten (36%). Overall success rates of initial treatment were 22/28 (79%). Of the six cases of failed treatment, five had been treated with systemic methotrexate alone. All women requiring further intervention had fetal pole present, and 50% had fetal cardiac activity. Failure rate of systemic methotrexate alone was 5/11 (45%). Eleven women deemed appropriate for conservative management did not require further treatment or experience complications. Nine women had data available for subsequent pregnancies, of whom two developed placenta accreta.

CONCLUSION

This study provides data that may assist in guideline development and decision-making for management of CSP. Conservative management in carefully selected women appeared to be safe. Nearly half of women treated with systemic methotrexate alone required another treatment modality, suggesting a role for intralesional treatment, particularly in the presence of fetal pole ± fetal cardiac activity. More than one in five women with documented subsequent pregnancies were diagnosed with placenta accreta.

Management and reproductive counseling in cervical, caesarean scar and interstitial ectopic pregnancies over 11 years: identifying the need for a modern management algorithm

STUDY QUESTION

Do management strategies (treatment type and order), including provision of reproductive counseling, differ in patients with non-tubal pregnancies?

SUMMARY ANSWER

Medical and surgical treatment strategies varied widely for each type of non-tubal pregnancy and reproductive counseling in this patient population is lacking.

WHAT IS KNOWN ALREADY

Owing to the rarity of non-tubal pregnancies, there is no consensus regarding treatment strategies or protocol. Furthermore, there is limited data on how patients with a non-tubal pregnancy are counseled about future fertility.

STUDY DESIGN SIZE DURATION

This is a descriptive retrospective study. Data were collected from January 2006 to December 2017. A total of 50 patients were included in the study.

PARTICIPANTS/MATERIALS SETTING METHODS

Patients with an ultrasound diagnosis of a non-tubal ectopic pregnancy (e.g. cervical ectopic pregnancy [CEP], Caesarean scar pregnancy [CSP] or interstitial ectopic pregnancy [IEP]) were included. This study was performed at a university-based institution tertiary referral center. Demographic and clinical characteristics, treatment type and order, reproductive counseling and outcomes were collected. Descriptive statistics were used for analyses.

MAIN RESULTS AND THE ROLE OF CHANCE

Of the 50 patients identified, 13 were CEP (26%), 8 were CSP (16%) and 29 were IEP (58%). Patients with a CSP had a higher parity (median = 3, P = 0.02) and number of prior Caesarean deliveries (mean = 2.1, P < 0.001). A total of 66% (23/35) of patients expressed a desire for future fertility prior to treatment and only 56% (28/50) of patients received reproductive counseling according to the electronic medical records. Among all non-tubal pregnancies, there were variations in the type and the order of treatments that patients received.

LIMITATIONS REASONS FOR CAUTION

This study was performed in a tertiary referral center therefore the management strategy could have been influenced by the prior interventions and patient response. The descriptive retrospective design precluded any assumption of causation.

WIDER IMPLICATIONS OF THE FINDINGS

The management for non-tubal pregnancies has wide variations. Reproductive counseling in this patient population is lacking. The findings highlight the need for the development of a treatment algorithm and a reproductive counseling protocol for each non-tubal pregnancy to better standardize treatment strategy.

STUDY FUNDING/COMPETING INTERESTS

There was no funding for this study. The authors have no conflict of interest to report.

Successful technique of manual vacuum aspiration for treatment of type 2 cesarean scar pregnancies: evaluation of 40 cases

OBJECTIVE

To demonstrate the effectiveness and safety of the defined manual vacuum aspiration (MVA) technique for treatment of type 2 cesarean scar pregnancies (CSPs).

METHODS

We treated 40 patients with CSP by MVA at the Early Pregnancy Clinic of our hospital between 1 January 2012 and 31 December 2014. The files of patients were reviewed and evaluated retrospectively. Eligibility criteria were hemodynamic stability and at least 2 mm myometrial thickness at the anterior part of the CSP. The key-point of successful MVA procedure is to keep away from entering the cesarean scar cavity directly; instead, CSP is displaced from the implantation site by applying vacuum, only while the cannula is passing near.

RESULTS

During the study period, the ratio of CSP to total pregnancies was 1/1000. The ratio of CSP to cesarean delivery (CD) was 1/372. In that time period, CSPs were constituted 4.41% of all ectopic pregnancies. Total of 40 patients were treated with dilatation and MVA. Complications such as excessive hemorrhage, persistence of CSP, and any need of extra intervention were not observed. The beta-hCG values of 21 patients (52.5%) decreased below 10 mIU/mL after the first 15 days, and the rest decreased below 10 mIU/mL after 3 weeks following MVA.

CONCLUSIONS

This MVA technique for treatment of CSP is easily applicable and effective method with high success and low complication rates. For appropriately selected patients, we think that this method can be considered as the first- line treatment.