Evidence-based management of non-tubal ectopic pregnancies

Interstitial pregnancy management: A multicentric analysis of 98 patients from the FRANCOGENT group comparing surgery and medical treatment

OBJECTIVE

To evaluate the outcomes associated with each therapeutic option for patients diagnosed with interstitial pregnancy (IP).

METHODS

We conducted a multicentric retrospective cohort study within the departments of Gynecology and Obstetrics involved in the Francogent research group. Women treated for an interstitial pregnancy between January 2008 to December 2019 were included. Three therapeutic options were evaluated: surgical treatment (ST); in situ methotrexate combined with systemic methotrexate (IS-MTX); and systemic methotrexate (IM-MTX). Success of first-line treatment was defined by hCG negativation (<5I U/L). Secondary outcomes included the need for secondary surgical procedure, secondary medical treatment, emergency surgery, postoperative complications, duration of hospitalization, and delay before hCG negativation.

RESULTS

A total of 98 patients were managed for IP: 42 (42.9%) patients had IM-MTX; 34 (34.7%) had IS-MTX; and 22 (22.4%) had ST. First-line treatment was successful in all patients of the ST group (22/22, 100%), in 31% of patients within the IM-MTX group (13/42) and 70.6% (24/34) in the IS-MTX group. The sole parameter associated with the risk of treatment failure was the mode of methotrexate administration. The size of the gestational sac or the presence of fetal heartbeat was not associated with decreased medical treatment (IS or IM-MTX) efficiency.

CONCLUSION

Either ST or IS-MTX are good options for IP treatment associated with high success rates. A single-dose regimen of IM-MTX is less efficient than IS-MTX or ST. Symptomatic patients with severity criteria should always undergo emergency surgery. IP remains a high-risk condition that should be managed, whenever possible, in referral centers to potentialize the chances of favorable outcomes.

Laparoscopic myomectomy to facilitate laparoscopic resection of a bleeding interstitial ectopic pregnancy

Interstitial pregnancies present a diagnostic and management challenge and are associated with significant bleeding risk. We present a case of an interstitial ectopic pregnancy where there was a diagnostic delay due to the presence of uterine fibroids and where a laparoscopic myomectomy was required in order to perform laparoscopic resection of the ruptured interstitial pregnancy.This case demonstrates the possibilities at laparoscopy for ectopic pregnancy, highlights the benefit of a structured 'buddy' system between gynaecology surgeons and brings attention to the paucity of literature on the unique management challenges of ectopic pregnancy in the presence of leiomyoma.

A 10‐year retrospective cohort study of non‐tubal ectopic pregnancy management outcomes in an Australian tertiary centre

Introduction

Non-tubal ectopic pregnancy (NTEP) is a rare but significant early pregnancy complication which can result in maternal morbidity and mortality. There is however a lack of evidence-based guidelines for the management of NTEP.

Purpose

To evaluate the success rates of expectant, medical and surgical management in the treatment of NTEP at our tertiary centre.

Methods

Retrospective cohort study from 2010 to 2020. All NTEP were classified by ectopic sites. Primary management was classified by expectant, medical [systemic methotrexate (Sys-MTX) and/or local ultrasound-guided injection of MTX and/or KCl intra-sac (L-MTX, L-MTX/KCl)] or surgical. Primary management was considered successful if no change in intervention was required. Treatment complications were compared.

Results

Twenty-four NTEP were identified, which included 14 interstitial pregnancies (IP), 9 caesarean scar pregnancies (CSP) and 1 ovarian pregnancy (OP), which gave NTEP an incidence of 7.12% among all EP (4.15% for IP, 2.67% for CSP and 0.30% for OP). The success of primary surgical management was 100% (7/7), primary medical management was 76.9% (10/13) and primary expectant management was 33.3% (1/3). Primary medical management had a non-statistically significant greater mean time to serum ß-human Chorionic Gonadotrophin <5 IU/L, mean length of hospitalisation, mean number of follow-up visits and hospital re-presentation/readmissions compared to primary surgical management. There was no other difference in complication rates between the treatment management groups.

Conclusion

Surgery remains the most effective way to manage NTEP. However, medical management can be a safe and effective alternative option in carefully selected cases.

Using MRI to differentiate upper-lateral intracavitary pregnancy and interstitial pregnancy for the patients with pregnancies in the uterotubal junction during the first trimester

Objectives

To retrospectively evaluate the diagnostic value of MRI for the uterotubal junctional pregnancies during the first trimester.

Methods

This retrospective study involved 59 patients (January 2016 to July 2021) with a preoperative imaging diagnosis of uterotubal junctional pregnancy. Using operative and pathological reports as the reference standard, we identified 22 patients with upper-lateral intracavitary (angular) pregnancy and 37 patients with interstitial pregnancy. Two senior radiologists, blinded to the patients’ information, reviewed the MRI images and determined each MRI feature based on the original interpretation criteria. Any disagreement was resolved by discussion to achieve a consensus. The sensitivity and specificity of each MRI feature were calculated according to the reference standard.

Results

The endometrial thickness in the upper-lateral intracavitary pregnancy group was larger than in the interstitial group (p = 0.001). The cutoff value of the endometrial thickness was 11.5 mm with a sensitivity, specificity, and area under the curve that were 77.3%, 64.9%, and 0.743, respectively. Two key features to diagnose upper-lateral intracavitary pregnancy were “medial free edge” and “medial free edge plus above-cutoff endometrial thickness.” The sensitivity and specificity of the medial free edge were 100% and 94.9%, respectively. The sensitivity and specificity of the medial free edge plus above-cutoff endometrial thickness were 77.3% and 100%, respectively. The key feature to diagnose interstitial pregnancy was an “intact lateral junctional zone,” of which the sensitivity and specificity were 94.6% and 100%, respectively.

Conclusions

MRI can be used to differentiate the upper-lateral intracavitary pregnancy and interstitial pregnancy during the first trimester.

Key Points

• We demonstrated MRI diagnostic criteria for the interstitial pregnancy and upper-lateral intracavitary pregnancy.

• MRI might be used to identify the complex interstitial pregnancies, those with a gestational sac protruding into the uterine cavity.

Concurrent Ovarian and Tubal Ectopic Pregnancy After IVF-ET: Case Report and Literature Review

Ovarian pregnancy (OP) coupled with tubal ectopic pregnancy is rare. We present a case of coexistent ovarian and tubal ectopic pregnancies in the same adnexa resulting from in vitro fertilization and embryo transfer (IVF-ET) for tubal occlusion. The patient presented with mild vaginal bleeding without abdominal pain. OP was diagnosed via sonographic findings of an ectopic gestational sac (GS) and yolk sac that seemed to be inside her left ovary. Laparoscopic exploration confirmed this diagnosis, and ipsilateral tubal ectopic pregnancy was suspected during surgery. The patient underwent left salpingectomy and resection of the ovarian lesion. A subsequent histopathological examination verified the diagnosis of coexistent ovarian and tubal ectopic pregnancy. Though the mechanism underlying concurrent OP and tubal ectopic pregnancy is still unclear, clinicians should be cautious of potential combined ectopic pregnancy when dealing with patients who have received more than one embryo transfer.

Similar but different: A comparison of rare site ectopic pregnancies

OBJECTIVES

A comparative examination of the clinical, laboratory, ultrasound findings, and operative characteristics of rare site located ectopic pregnancies.

METHODS

Retrospective analysis of all department cases of rare site located ectopic pregnancies diagnosed and treated from December 2006 to December 2019.

RESULTS

Thirty rare ectopic pregnancies were identified. Of these, 11 were ovarian, 10 were interstitial and 9 were tubal stump. The patients treated for ovarian pregnancy had significantly lower human chorionic gonadotropin (hCG) levels than patients treated for interstitial or stump pregnancies (2025 ± 1105 mIU/ml, 18,424 ± 2579 mIU/ml and 11,204 ± 9221 mIU/ml, respectively, p = 0.003). The main presenting symptom in patients with an ovarian pregnancy was abdominal pain (90.9%, 60.0% and 44.4%, respectively, p = 0.031). Signs of abdominal peritoneal irritation (i.e., rebound tenderness and guarding) were more frequent upon physical examination in patients with an ovarian pregnancy (72.2%, 30.0% and 22.2%, respectively, p = 0.044) who also exhibited the highest rates of syncope and hypovolemic shock upon admission compared to patients with an interstitial or stump pregnancy (54.5%, 10.0% and 11.1%, respectively, p = 0.031). Ovarian pregnancies were associated with the lowest sonographic detection rates (9.1%, 80.0% and 100%, respectively, p = 0.0001) and with free fluid in the pouch of Douglas (72.7%, 20.0% and 22.2%, respectively, p = 0.02). Ovarian pregnancies experienced the highest rupture rate during surgery compared to interstitial or stump pregnancies (66.9%, 16.7% and 44.4%, respectively, p = 0.028), had a significantly higher estimated blood loss (1081 ± 647 ml, 760 ± 597 ml and 343 ± 318 ml, respectively, p = 0.003) and required blood transfusions in the perioperative period (63.6%, 20.0% and 11.1%, respectively, p = 0.025) significantly more often.

CONCLUSIONS

Ovarian pregnancy remains the most challenging diagnosis compared to interstitial and tubal stump ectopic's. Health care providers should recognize these rare site ectopic pregnancies and to handle these gynecological emergencies promptly.

Ectopic pregnancy: a resident's guide to imaging findings and diagnostic pitfalls

Ectopic pregnancy (EP) is a term used to describe any pregnancy which does not implant into the uterine cavity. There are several types of EPs: tubal, interstitial, ovarian, abdominal, heterotopic, cervical, and cesarean scar. Ectopic pregnancies can acutely rupture and are the number one cause of maternal death in the first trimester of pregnancy. Therefore, prompt recognition and accurate localization have significant clinical implications on patient outcome. Unfortunately, EPs have many mimickers, which can make the diagnosis challenging in certain cases. In this review, we aim to describe and illustrate sonographic findings of each type of EP, as well as present mimickers and various imaging pitfalls. We will clarify how to avoid potential misdiagnoses that could adversely affect patient outcomes. Lastly, we will briefly address management of each type of EP and discuss potential complications.

Efficacy of In Situ Methotrexate Injection in the Treatment of Nontubal Ectopic Pregnancies: A Retrospective Multicenter Study

STUDY OBJECTIVE

Evaluation of the efficacy of different injection sites of methotrexate in the treatment of nontubal ectopic pregnancies.

DESIGN

Retrospective multicenter study.

SETTING

Multicenter, including 3 teaching hospitals, an intercommunal hospital, and a clinic.

PATIENTS

A total of 106 patients with nontubal ectopic pregnancies, including 59 interstitial, 39 cesarean scar, and 8 cervical or isthmic.

INTERVENTIONS

Overall, 58 patients received methotrexate via intramuscular injection (IM group), 35 received methotrexate via in situ injection (IS group), and 13 received a combination of both in situ and intramuscular injections of methotrexate (IS + IM group).

MEASUREMENTS AND MAIN RESULTS

The main end point of this study was measured via the primary success rate (defined as a negative β-human chorionic gonadotropin level without recourse to any additional treatment) of treatment with methotrexate according to injection site. The primary success rate was 46.55% in the IM group, 60% in the IS group, and 61.54% in the IS + IM group, respectively. In the multivariate analysis, the primary success rate of treatment was significantly correlated to the in situ injection of methotrexate, either solely or in conjunction with an intramuscular injection of methotrexate administered the following day, (odds ratio = 2.7; 95% confidence interval, 1.03-7.14).

CONCLUSION

Solely an intramuscular injection of methotrexate is a less efficient first-line treatment strategy for the conservative management of nontubular ectopic pregnancy. The use of an in situ injection of methotrexate should therefore be preferred.

An updated guide to the diagnosis and management of cesarean scar pregnancies

PURPOSE OF REVIEW

To review the current literature on the diagnosis and management of cesarean scar pregnancies RECENT FINDINGS: The incidence of cesarean scar pregnancies (CSPs) is increasing as a result of the increasing cesarean section rate, improved diagnostic capabilities, and a growing awareness. CSPs are associated with significant morbidity and early diagnosis is key. Diagnosis is best achieved with transvaginal ultrasound. Sonographic diagnostic criteria have been developed over decades and recently endorsed by the Society for Maternal-Fetal Medicine and other professional societies. The current categorization system differentiates CSPs that are endogenic or 'on the scar' from those that are exogenic or 'in the niche'. Following diagnosis, the challenge remains in determining the optimal management as multiple modalities can be considered. Studies have demonstrated the favorable outcomes with combined local and systemic methotrexate, surgical excision through multiple routes, and adjunctive therapies, such as uterine artery embolization or uterine balloons. The current evidence is insufficient to identify a single best treatment course and a combined approach to treatment is often required.

SUMMARY

Successful outcomes while minimizing complications can be achieved with a multidisciplinary, collaborative effort. Guidelines for cesarean scar pregnancies will continue to evolve as the published reports grow.

Case Report of Spontaneous Bilateral Ovarian Pregnancy in a Nulliparous Lady

Nontubal ectopic pregnancies, especially ovarian ones, are rare. Here, we report a case of spontaneous bilateral ovarian pregnancy in a 23-year-old nulliparous lady who presented with a three-day history of abdominal pain localized to the right iliac fossa. Laboratory investigations and pelvic US and transvaginal US findings were suggestive of a right ovarian ectopic pregnancy and left ovarian cyst. Following the patient's consent, the gynaecologist laparoscopically removed the right ovarian ectopic pregnancy and performed a left ovarian cystectomy. Histopathology revealed findings of trophoblastic tissue and chorionic villi with products of conception in both ovaries leading to the diagnosis of bilateral spontaneous ectopic pregnancy. Physicians must be mindful in cases that have a similar clinical presentation because an early diagnosis leads to a reduction in the morbidity and mortality of this specific patient population and helps to improve their overall prognosis.

Successful management of cervical ectopic pregnancy with embryo reduction: report of three cases

If methotrexate (MTX) fails to resolve cervical ectopic pregnancies (CEP), the remaining surgical options result in the potential loss of the patient’s fertility. Therefore, we examined if the embryo reduction technique can resolve the CEP without any complications while conserving the patient’s fertility. We report three cases in which CEP didn’t respond to MTX but was successfully solved by embryo reduction. Each patient underwent a standard in vitro fertilization (IVF) protocol. Once CEP was confirmed, the pregnancy’s location, the fetus’s size and gestational sac and heartbeat were determined. Afterward, embryo reduction was performed under general anesthesia (operative time: ~30 min). All patients had successful procedures without any postoperative complications. Since the procedure, one woman was pregnant and delivered, the second has registered a positive β-human chorionic gonadotropin test and the last is waiting for IVF preparation. In summary, embryo reduction is a feasible approach in the management of CEP with favorable fertility outcomes.

Laparoscopic management of a primary posterior cul-de-sac abdominal ectopic pregnancy

OBJECTIVE

To report a case of laparoscopic management of a primary posterior cul-de-sac abdominal ectopic pregnancy (AEP).

DESIGN

Video article.

SETTING

Academic medical center.

PATIENT(S)

A 40-year-old G5P3013 woman at approximately 7 weeks of pregnancy was referred to our emergency department because of abnormally rising β-human chorionic gonadotropin levels. Transvaginal ultrasonography revealed a cystic structure measuring 2.8 × 1.6 ×1.9 cm in the posterior cul-de-sac distinct from the cervix. The mass was noted to have peripheral hypervascularity and a thickened wall. A moderate amount of complex free fluid was noted adjacent to the mass. The patient's baseline β-human chorionic gonadotropin level and hematocrit were 6,810.7 mIU/mL and 42.4%, respectively.

INTERVENTION(S)

Laparoscopy for suspected AEP.

MAIN OUTCOME MEASURE(S)

Laparoscopic excision of a primary AEP.

RESULT(S)

Diagnostic laparoscopy revealed a normal uterus, normal right ovary, normal left ovary with a corpus luteal cyst, and normal bilateral fallopian tubes without dilatation or hemorrhage. The AEP was noted in the right posterior cul-de-sac and was excised from the underlying peritoneum. The left lateral aspect of the AEP extended into the posterior vaginal wall. The patient was admitted for overnight observation, and her postoperative hematocrit was 35.1%.

CONCLUSION(S)

AEPs are extremely rare and account for 1% of all ectopic pregnancies. Approximately 90% of AEPs require surgical management. Historically, AEPs were treated with laparotomy because of the high risk of hemorrhage and hemodynamic instability. However, as exemplified by the current case, laparoscopy is a safe and feasible option for surgical management of AEPs.

Management of Non-Tubal Ectopic Pregnancies: A Single Center Experience

Non-tubal ectopic pregnancies (NT-EPs) are rare but potentially life-threatening conditions. The incidence ranges are between 5-8.3% of all ectopic pregnancies. For this retrospective observational study, 16 patients with NT-EP and treated from January 2014 to May 2020 were recruited. Demographic details, symptoms, Beta human chorionic gonadotrophin (β-hCG) levels, ultrasound findings, management and treatment outcomes were presented. In hemodynamically stable patients, diagnosis was made using ultrasounds and β-hCG levels. Laparoscopy was essential to identify and remove the ectopic pregnancy in clinical unstable patients. A radical laparoscopic approach was chosen in one case of cervical pregnancy diagnosed late in the first trimester. Medical treatment and minimally invasive procedure, alone or combined, resulted in effective strategies in asymptomatic women with an early diagnosis of NT-EP. We report cases of cervical pregnancies successfully treated by hysteroscopy alone or combined with medical treatment, the first case of scar pregnancy treated by mini-reseptoscope and curettage and the fifth case of interstitial pregnancy treated with Methotrexate and Mifepristone. In this manuscript we report a single center experience in the management of NT-EPs with the aim of outlining the importance of the early diagnosis for a minimally invasive treatment in order to reduce maternal morbidity and mortality and preserve future fertility.

Effectiveness of conservative medical treatment for non-tubal ectopic pregnancies: a multicenter study

OBJECTIVE

To assess the effectiveness of conservative treatment for the management of non-tubal ectopic pregnancies (NTEP) METHODS: Retrospective cohort study in three centers (two referral centers) of patients managed for NTEP diagnosed by 2D or 3D ultrasonograhy. Patients underwent one of the following: expectant management, systemic methotrexate (MTX) injection, local MTX injection, combined MTX injection (local and systemic), local injection of hyperosmolar glucose, or misoprostol administration. The primary endpoint was final success defined by resolution of hCG level without need for emergency surgical treatment. Sixty-four patients diagnosed with NTEP were included: 37 (57%) had an interstitial pregnancy, 23 (35.9%) a cesarean scar pregnancy, two (3.1%) a cervical pregnancy and two (3.1%) an ovarian pregnancy.

RESULTS

Six patients (9.4%) underwent expectant management, 24 (37.5%) a systemic MTX injection, 28 (43.8%) a local injection of MTX, three (4.7%) a combined MTX injection, one (1.6%) a local injection of hyperosmolar glucose (1.6%), and two (3.1%) were administered misoprostol. The median age was 32 years (22-45) and mean follow-up was 41 months. The final success rate overall was 92.2%: 100% for expectant management, 87.5% for systemic MTX, 96.4% for local MTX, 100% for combined injection of MTX, 100% for local injection of hyperosmolar glucose, and 50% for misoprostol. No patient required a hysterectomy. Nine (14.1%) patients required surgery, including five (7.8% (5/64)) following a rupture of the NTEP.

CONCLUSIONS

Our results suggest that conservative medical management of NTEP is effective and safe and should be the first-line treatment for pauci-symptomatic patients with an NTEP.

Combination methotrexate and gefitinib: A potential medical treatment for inoperable nontubal ectopic pregnancy

Nontubal ectopic pregnancies present as a therapeutic challenge. A 35-year-old primigravida at 7 weeks gestation had a live interstitial ectopic pregnancy and contraindications to surgery. The patient was treated with a multidose methotrexate regimen combined with oral gefitinib (250 mg daily for 7 days). The peak human chorionic gonadotropin (hCG) of the patient was recorded at 19 510 IU/L and began declining from day 4 of combination therapy (day 6 of initial treatment). Successful resolution of the ectopic was demonstrated by cessation of the fetal heart by day 15 and hCG falling to 23 IU/L by day 42. A 10-year review of all nontubal ectopic pregnancies treated with methotrexate identified 46 cases, which had a comparable time to resolution to combination therapy. However, for cases where cardiac activity was present, the median time to resolution following methotrexate treatment was 64 days (47-87 days), 22 days longer than combination therapy. Combination therapy may provide a safe medical treatment for inoperable nontubal ectopic pregnancy.

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.

Ultrasound of the First Trimester

Ultrasound is the imaging study of choice for detection and full characterization of early pregnancies based on its accuracy, low cost, safety profile, and abundant availability. This article reviews the goals and utility of first-trimester ultrasound in gestation localization, viability determination, and abnormal pregnancies, including ectopic implantation, retained products, and molar pregnancy.

Ruptured caesarean scar ectopic pregnancy: a diagnostic dilemma in a resource-limited setting

BACKGROUND

Caesarean scar pregnancy (CSP) remains a very rare form of ectopic pregnancy associated with serious life threatening obstetric complications and even death in case of late diagnosis and treatment.

CASE PRESENTATION

We report a case of a ruptured caesarean scar pregnancy in a 29 year-old gravida 5, para 3 with a past obstetric history of two consecutive caesarean sections done 9 and 5 years ago respectively. The patient presented with intermittent lower abdominal pains on a 20 weeks gestation associated with mild epigastralgia and 2 previous episodes of mild pervaginal bleeding (2 and 1 months ago respectively before consultation) managed with injectable progesterone. Her evolution 4 h later was marked by an increase in the intensity of the abdominal pain, an unmeasurable blood pressure and a feeble pulse. Immediate paracentesis revealed 10 cc of fresh non coagulating blood. The diagnosis of ruptured ectopic pregnancy with abundant hemoperitoneum was considered and an emergency laparotomy with fluid and blood resuscitation was carried out. A midline laparotomy revealed a ruptured caesarean scar ectopic pregnancy with an abundant hemoperitoneum. Careful resection of the placenta and repair of the ruptured isthmic region of the uterus was carried out. Recovery after surgery was without complications and the patient was discharged on the 6th day following surgery.

CONCLUSION

Caesarean scar pregnancy remains a very rare obstetric condition. Late diagnosis of this condition can be associated with serious life threatening obstetric complications. The rarity of the condition warrants a high index of suspicion among clinicians.

To evaluate the feasibility of magnetic resonance imaging in predicting unusual site ectopic pregnancy: a retrospective cohort study

OBJECTIVE

To evaluate the accuracy of pelvic MRI in the diagnosis of unusual ectopic pregnancy (EP), when ultrasound (US) examination is inconclusive.

METHODS

We retrospectively reviewed the medical records of 150 patients with suspected EP. Clinical, US and MRI features of 15 unusual EPs were analysed. Two radiologists independently reviewed each case resolving by consensus any diagnostic discrepancy. Interobserver agreement was assessed using the Cohen κ test.

RESULTS

MRI displayed a gestational sac-like structure surrounded by a thick wall in all cases. The thick wall displayed hyperintensity in 41 %, isointensity in 35 % and hypointensity in 24 % of cases on T1-weighted images. Diffusion- and fat saturation T1-weighted images were the most accurate sequences, as they enabled identification of 15/15 and 14/15 patients, respectively. Although US was false negative in detecting cervical and uterine infiltration underlying the caesarean scar, MRI was able to identify the invasion. Interobserver agreement was very good for all sequences (κ=0.892-1.0).

CONCLUSIONS

MRI plays an important role in the early diagnosis of unusual EP. It should be considered after negative US findings, providing accurate evaluation of the site and the possible infiltration of these lesions, which help in the management of these patients.

KEY POINTS

• MRI is being increasingly used as a problem-solving modality in ectopic pregnancy. • MRI plays an important role in early diagnosis of unusual ectopic pregnancy. • Knowledge of MRI features in EP is essential to determinate appropriate management.