Effectiveness of medical treatment with methotrexate for interstitial pregnancy

Case report: Ectopic pregnancy in the interstitial part of the fallopian tube

Ectopic pregnancy remains one of the most common causes of pregnancy-related death in the first trimester. 2.4% of ectopic pregnancies occur in the interstitial part of the fallopian tube. As the symptoms of this condition are non-specific and the localization is associated with a higher risk of bleeding, early diagnosis of interstitial pregnancies is important, based not only on clinical symptoms, but also on additional diagnostic methods. Early diagnosis leads to better treatment-related outcomes. We report a 32-year-old female patient who came to the emergency department because of pain in the lower abdomen and right iliac region and bloody vaginal discharge. During palpation of the abdomen, the pain was localized in the lower part of the abdomen. Human chorionic gonadotropin (hCG) was significantly increased in biochemical tests. Transvaginal ultrasound examination of internal genital organs, abdominal and pelvic computer tomography (CT) were per-formed. An ectopic pregnancy was suspected. Thus, the patient was hospitalized in the gynecology department for surgical treatment. A laparoscopy was performed and an ectopic pregnancy was diagnosed in the interstitial part of the right fallopian tube and in the right uterine corner, which led to right salpingectomy and right uterine angle resection. Thus, interstitial pregnancy is a rare and life-threatening gynecological condition due to the higher risk of bleeding compared to other ectopic pregnancies. However, appropriate diagnosis based on clinical signs, transvaginal ultrasound findings and hCG levels in the blood ensures early diagnosis of interstitial pregnancy, which leads to the choice of medical treatment with methotrexate or minimally invasive surgical techniques.

Interstitial ectopic pregnancy successfully treated with methotrexate

An ectopic pregnancy (EP) occurs when the fertilised ovum implants outside the endometrial cavity. An EP has an incidence of 1%, with the majority occurring in the fallopian tube. It has a maternal mortality of 0.2 per 1000, with about two-thirds of these deaths associated with substandard care. An interstitial pregnancy occurs when the EP implants in the interstitial part of the fallopian tube. An interstitial ectopic pregnancy (IEP) shows few early clinical symptoms, hence it is associated with serious or fatal bleeding and a mortality rate up to 2.5%. With the advent of transvaginal ultrasound scan (TV USS), correlated with serum beta human chorionic gonadotropin (BHCG) assay, earlier diagnosis of an EP can be established. An EP is often diagnosed in women who are trying to conceive; therefore, the prognosis of future fertility is one of the main concerns associated with this diagnosis. Management can be surgical, expectant or medical with methotrexate (MTX). However, the best approach is tailored to the woman's individual case. The authors present the case of a primigravida woman presenting with abdominal pain and vaginal bleeding at 6 weeks gestation following assisted reproduction. Her BHCG showed a suboptimal rise. Her TV USS showed no evidence of an intrauterine pregnancy. There was no evidence of an adnexal mass or free fluid. As her BHCG remained static, she underwent a diagnostic laparoscopy. A right sided IEP was identified. Due to the high risk of bleeding requiring transfusion or hysterectomy and her desire to preserve her fertility, she received medical management with MTX. Indeed, research has shown that women successfully managed expectantly achieve better reproductive outcomes, with the shortest time to achieve a subsequent intrauterine pregnancy. This case acts as a cautionary reminder of the challenges associated with identifying an IEP on TV USS. A high index of clinical suspicion is required to prevent maternal morbidity and mortality.

Successful Ultrasound-Guided Methotrexate Intervention in the Treatment of Heterotopic Interstitial Pregnancy: A Case Report and Literature Review

PURPOSE

This study aims to share the experience of minimally invasive ultrasound-guided methotrexate intervention in the treatment of heterotopic interstitial pregnancy (HIP) with good pregnancy outcomes, and to review the treatment, pregnancy outcomes, and impact on the future fertility of HIP patients.

METHODS

The paper describes the medical history, clinical manifestations, treatment history, and clinical prognosis of a 31-year-old woman with HIP, and reviews cases of HIP from 1992 to 2021 published in the PubMed database.

RESULTS

The patient was diagnosed with HIP by transvaginal ultrasound (TVUS) at 8 weeks after assisted reproductive technology. The interstitial gestational sac was inactivated by ultrasound-guided methotrexate injection. The intrauterine pregnancy was successfully delivered at 38 weeks of gestation. Twenty-five HIP cases in 24 studies published on PubMed from 1992 to 2021 were reviewed. Combined with our case, there were 26 cases in total. According to these studies, 84.6% (22/26) of these cases were conceived by in vitro fertilization embryo transfer, 57.7% (15/26) had tubal disorders, and 23.1% (6/26) had a history of ectopic pregnancy; 53.8% (14/26) of the patients presented with abdominal pain and 19.2% (5/26) had vaginal bleeding. All cases were confirmed by TVUS. In total, 76.9% (20/26) of intrauterine pregnancies had a good prognosis (surgery vs. ultrasound interventional therapy 1:1). All fetuses were born without abnormalities.

CONCLUSIONS

The diagnosis and treatment of HIP remain challenging. Diagnosis mainly relies on TVUS. Interventional ultrasound therapy and surgery are equally safe and effective. Early treatment of concomitant heterotopic pregnancy is associated with high survival of the intrauterine pregnancy.

Surgical Treatment Following Failed Medical Treatment of an Interstitial Pregnancy

Interstitial pregnancy (IP) is a type of ectopic pregnancy in which the embryo implants in the interstitial part of the Fallopian tube. It accounts for 2% of all ectopic pregnancies. Signs and symptoms appear later than the other forms of ectopic pregnancies because of its peculiar location. The gold standard for its diagnosis is transvaginal ultrasound. The treatment can be medical or surgical. Medical treatment is based on the systemic or local injection of methotrexate (MTX); a dose of mifepristone can be added with a reported 85–90% success rate. The surgical option is laparoscopic unilateral cornuostomy or unilateral salpingectomy. The therapeutic choice is based on symptoms, serum β-human chorionic gonadotropin (β-hCG) values, and sonographic features. Furthermore, the patient’s fertility perspectives should be considered. We report a case of IP in a Caucasian woman of 29 years old, with a previous salpingectomy for ectopic pregnancy medically treated by a double dose of intramuscular MTX 50 mg/m² combined with a single dose of leucovorin 15 mg and a single dose of mifepristone 600 mg orally. Medical therapy failed as suggested by the sudden onset of intense pelvic pain after 10 days. Because of the clinical symptoms and the sonographic suspicious of pregnancy rupture due to the modest amount of fluid in the pouch of Douglas, clinicians decided on an urgent unilateral laparoscopic salpingectomy. The hemoperitoneum was drained. The patient was discharged two days later and β-hCG serum levels became negative after 45 days. The advantages of fertility sparing should be weighted according to the patient’s reproductive perspectives. Appropriate counseling is therefore key in managing the treatment of interstitial pregnancy.

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.

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.

Arteriovenous uterine malformation developed from an interstitial pregnancy on residual tubal stump: A critical managment in a fertile woman

Uterine arteriovenous malformations are rare conditions with diverse clinical presentation that range from asymptomatic patients to different degrees of menorrhagia, commonly associated with previous pregnancy or uterine trauma. This case report describes a 36-year-old woman who presented with ultrasound diagnosis of interstitial pregnancy on residual right tube stump 4 months after a laparoscopic salpingectomy for extrauterine pregnancy. She started treatment with methotrexate; afterwards serum human chorionic gonadotropin levels and ultrasound follow-ups were scheduled. While serum human chorionic gonadotropin levels were progressively reducing, transvaginal ultrasound follow-ups showed a persistent anechoic mass on right rube stump, with increased peripheral high flow vascularity: highly suspicious for a uterine arteriovenous malformation. A laparoscopy was performed with a tumorectomy of the mass. The histopathological exam of the specimen confirmed uterine arteriovenous malformation. Patient successfully became pregnant 2 years later, with an eventless pregnancy and a vaginal delivery without complications.

Laparoscopic reversible occlusion of uterine arteries and cornuostomy for advanced interstitial pregnancy

During laparoscopic enucleation of an interstitial pregnancy, adequate hemostatic control is of paramount importance due to the high vascularization of the uterine cornus. However, no consensus or guidance exists regarding the optimal hemostatic technique. We report laparoscopic reversible uterine arteries occlusion as hemostatic technique during laparoscopic enucleation by cornuostomy of an interstitial pregnancy at advanced gestational age (46 × 40 mm gestational sac). Preliminary identification of the uterine arteries and bilateral reversible occlusion by Hem-o-Lok clips allowed bleeding control during surgery. The laparoscopic procedure was performed without complications and with limited blood loss. The reported case reinforces the feasibility of this minimally invasive technique in interstitial pregnancy.

Multidosing Intramuscular Administration of Methotrexate in Interstitial Pregnancy With Very High Levels of β-hCG: A Case Report and Review of the Literature

Ectopic pregnancy (EP) is the implantation of an embryo outside the endometrial cavity of the uterus. Signs and symptoms of EP may arise between the 6th and the 8th week of gestation and include vaginal bleeding, lower abdominal and pelvic pain. Frequently EPs implant in the fallopian tubes. A rare EP is the interstitial pregnancy, a life-threatening condition being responsible for nearly 20% of all deaths caused by EPs. Because of its unique location, the diagnosis is difficult and based on signs and specific criteria together with measuring of serum β-hCG. Usually, EP is treated by surgical approach, which is associated with increased morbidity, decreased fertility and increased likelihood of hysterectomy and uterine rupture in a subsequent pregnancy. Early diagnosis is crucial to life saving and allowing alternative therapeutic interventions such as pharmacological treatments. Methotrexate (MTX) represents the mainstay therapy. There is no standard care for the interstitial pregnancy for what concerns either surgical or pharmacological approaches. We reported a case of a 36-year-old woman admitted to the Hospital of Salerno-Italy with a value of serum β-hCG of 35,993 IU/L. Transvaginal ultrasonography revealed an empty uterine cavity and a mass of 35.7 mm in diameter characterized by a hypoechoic central area. The patient was in stable haemodynamic condition and no haematologic, renal and hepatic impairments were recorded. Despite the high serum β-hCG levels, a pharmacological approach was preferred to a surgical one. The patient was treated with intramuscular administration of MTX in daily dose of 1 mg/Kg alternated with 0.1 mg/kg folinic acid for 5 days. The patient remained hospitalized for 20 days and no side effects were reported. The decrease of the serum β-hCG was monitored and more than 15% reduction was detected between the 4th and the 7th day after the beginning of the treatment. The serum β-hCG became undetectable 35 days after. A multidosing intramuscular administration of MTX was effective and safe even in the presence of very high serum β-hCG levels. Together with similar cases reported in literature, the present results can contribute to improve the decision making in the treatment of the interstitial pregnancy.

Therapeutic outcomes of methotrexate injection in unruptured interstitial pregnancy

Objective

To examine the therapeutic outcomes of methotrexate (MTX) in the treatment of unruptured interstitial pregnancy.

Methods

We reviewed the medical records of patients who were diagnosed with interstitial pregnancy and received MTX as first-line treatment between January 2003 and July 2014 at CHA Gangnam Medical Center. The treatment success rates and subsequent pregnancy outcomes were examined.

Results

Ninety-seven patients were diagnosed with interstitial pregnancy between January 2003 and July 2014. Of them, 38 initially received MTX treatment. The diagnosis was made at a median of 6⁺³ weeks (5⁺⁰ to 11⁺³ weeks). Thirty patients received a systemic MTX injection, while the other 8 received a local MTX injection. Systemic treatment composed of an 8-day alternating MTX regimen, single-dose regimen, or high-dose regimen (100 mg/m² + 200 mg/m² intravenously over 12 hours). The local injection consisted of a direct MTX injection into the gestational sac with or without systemic MTX injection. Twenty-one patients (55.3%) were successfully treated with MTX. However, MTX therapy failed in 17 patients (44.7%), who required surgery. Mode of MTX treatment was the only predictive variable of MTX treatment success (P=0.039). Treatment success was seen in 7 of 8 patients (87.5%) in the local MTX group vs. 14 of 30 patients (46.7%) in the systemic MTX group. After treatment, 13 patients attempted a successive pregnancy; of them, 10 patients had a confirmed clinical pregnancy and healthy live birth.

Conclusion

Combined MTX treatment including a local injection might be an initial approach to the treatment of interstitial pregnancy.

Considerations for management of interstitial ectopic pregnancies: two case reports

Background

Conventional treatment of interstitial pregnancies includes systemic methotrexate, direct methotrexate injection, wedge resection, or hysterectomy. We present two cases of interstitial pregnancies that were successfully managed by different minimally invasive surgical techniques. We also report the novel use of hysteroscopic urologic stone retrieval forceps in the transvaginal removal of persistent products of conception after systemic methotrexate for an interstitial pregnancy.

Case presentation

Case 1 was a 28-year-old gravida 1 white woman at 8 weeks gestation; she was diagnosed with a left interstitial pregnancy. After laparoscopic confirmation of the interstitial pregnancy, successful ultrasound-guided suction dilation and curettage was performed. Case 2 was a 33-year-old gravida 3 para 1021 (one term pregnancy, no preterm pregnancies, one ectopic pregnancy and one spontaneous miscarriage, and one living child) Hispanic woman with persistent products of conception after systemic methotrexate for a left interstitial pregnancy. She underwent hysteroscopic-guided removal of the persistent products of conception, which was possible due to novel use of urologic stone retrieval forceps.

Conclusions

Successful minimally invasive treatment of interstitial pregnancies may be possible in certain cases. Collaboration between different specialties continues to be important for improving minimally invasive options.

[Cornual pregnancy: Management and subsequent fertility]

OBJECTIVE

Cornual pregnancy is a rare entity, representing 2% of ectopic pregnancies. Its management is poorly codified and often guided by the clinical situation. The aim of our study was to describe the management of cornual pregnancies, subsequent fertility, and obstetric outcomes according to the management.

METHODS

Observational retrospective unicentric study. Nineteen patients hospitalized for cornual pregnancy between 2006 and 2015 were included. The data was collected with medical records and a phone standardized questionnaire. Patients were managed according to hemodynamic status by either systemic or local methotrexate injection or surgical corneal resection.

RESULTS

Among the 19 patients, 32% (6) were treated by systemic injection (one failure treated by surgical treatment) and 68% (13) underwent surgical treatment by cornual resection. The median HCG rate decrease was 33 days (16-62). Among the twelve patients with a desire for a new pregnancy, 7 (58%) became pregnant without assisted reproductive technology (2 following medical treatment and 5 following surgical resection). Histological analysis of uterine horn showed proximal fallopian tube lesions in 76.9% of case (chronic salpingitis, endosalpingiosis and adenomyosis).

CONCLUSION

Cornual pregnancies are at high risk of hemorrhagic rupture. Ectopic recidive may occur. Fertility and obstetrical outcomes following cornual pregnancy are not affected whatever the initial treatment. Other studies are needed to aid clinical management according to HCG level and ultrasound features.

Preferences and Outcomes for Chemotherapy Teaching in a Postgraduate Obstetrics and Gynecology Training Program

PURPOSE

To determine whether chemotherapy teaching is a desired component of postgraduate training programs in obstetrics and gynecology and assess its effect on practicing clinicians.

METHOD

After obtaining institutional review board approval, 99 individuals who completed postgraduate training at a single academic medical center between 2005 and 2013 were invited to complete an online survey. Descriptive statistics were used to summarize responses.

RESULTS

Of the 99 individuals, 68 (68%) completed the survey. Respondents included physicians currently practicing in both academic medicine (n = 36, 52.9%) and private practice (n = 24, 35.2%). Most respondents (n = 60, 88.2%) indicated that chemotherapy teaching was a desired feature of their training and expressed a preference for both formal didactics and direct clinical involvement (n = 55, 80.2%). Benefits identified by respondents included improved insight into the management of symptoms commonly associated with chemotherapy (n = 55, 82.1%) and an enhanced ability to counsel patients referred for oncology care (n = 48, 70.5%). All respondents who pursued training in gynecologic oncology following residency (n = 6) indicated that chemotherapy teaching favorably affected their fellowship experience. Of the 6 gynecologic oncologists, 3 (50%) who responded also indicated that chemotherapy teaching during residency improved their performance in fellowship interviews.

CONCLUSION

Chemotherapy teaching was a desired feature of postgraduate training in general obstetrics and gynecology at the institution studied. Consideration should be given to creating curricula that incorporate the principles and practice of chemotherapy and address the needs of obstetrics and gynecology trainees who intend to pursue both general and subspecialty practice.