Chronic ectopic pregnancy--two cases of acute rupture despite negative beta hCG

Updates in emergency medicine: Ectopic pregnancy

INTRODUCTION

Ectopic pregnancy is a serious condition that can have significant morbidity and mortality.

OBJECTIVE

This review highlights the pearls and pitfalls of ectopic pregnancy, including presentation, diagnosis, and management in the emergency department (ED) based on current evidence.

DISCUSSION

Ectopic pregnancy is a pregnancy that implants outside the normal uterine cavity. It most commonly presents with vaginal bleeding, abdominal or pelvic pain, and amenorrhea. Risk factors for ectopic pregnancy include abnormalities of the fallopian tube, prior ectopic pregnancy, and age over 35 years, but a significant number of patients with confirmed ectopic pregnancy will not have an identifiable risk factor. In patients with suspected ectopic pregnancy, evaluation includes quantitative serum hCG, blood type, and ultrasound. Ultrasound is necessary regardless of the hCG level. If the patient is hemodynamically unstable, resuscitation with blood products and early consultation of obstetrics/gynecology is necessary. Patients with confirmed ectopic pregnancy but who are otherwise stable may be managed medically or surgically. If a yolk sac or fetal pole is not seen in the uterus on ultrasound, this is considered a pregnancy of unknown location (PUL), which may represent an early, failed, or ectopic pregnancy. Stable patients with a PUL who can reliably follow up are managed with close specialist follow up and repeat 48 h HCG level. These patients need to have an hCG level repeated every 48 h until diagnosed with a viable pregnancy, failed pregnancy, or ectopic pregnancy.

CONCLUSIONS

Knowledge of the latest advances in managing ectopic pregnancy will help clinicians more quickly and accurately diagnose patients presenting with this potentially fatal condition.

Intramyometrial pregnancy presenting as abnormal uterine bleeding in perimenopausal female

Abnormal uterine bleeding (AUB) is frequently encountered in the gynecological complaint of perimenopausal female visiting the outpatient department. Beginning in mid-40s, perimenopause is often marked with menstrual irregularities. Intramyometrial pregnancy (IMP) is a rare type of ectopic pregnancy with an incidence of <1% of all ectopic gestation may present as AUB in perimenopausal female. It remains a diagnostic challenge, especially in background of negative pregnancy test with the lesion ultrasonographically mimicking a fibroid with or without degeneration or an adenomyoma. We report the case of a 41-year-old perimenopausal female presenting with AUB not responding to medical management and ultrasound suggestive of degenerative fibroid. Hence, total laparoscopic hysterectomy was done and histopathology revealed the lesion to be IMP. The aim of this case report is to consider this rare entity as a possible cause of AUB in perimenopausal female even in the pretext of negative pregnancy test.

Unexpected rupture of an expectantly managed tubal ectopic pregnancy: a reminder for enhanced diligence

Expectant management of tubal ectopic pregnancies is a feasible and possibly preferable method of management in asymptomatic women with low serum β-human chorionic gonadotropin (hCG). This involves serial monitoring of β-hCG until negative, after which it is deemed as spontaneously resolved ectopic pregnancy. We describe a case of tubal ectopic pregnancy which was expectantly managed with an initial β-hCG of 585 mIU/mL until undetectable. This patient presented with ruptured ectopic pregnancy 8 weeks after the original diagnosis, at the level of 5 mIU/mL. This highlights the importance of close monitoring in the expectant management of tubal ectopic pregnancies, with the incorporation of imaging, even when serial β-hCG shows a persistently reducing trend.

The diagnostic conundrum of chronic ectopic pregnancy: A case report

Chronic ectopic pregnancy (CEP) is a rare condition caused by implantation of trophoblastic tissue in the fallopian tube, which causes protracted tissue destruction at the site of attachment. The process of minor rupture and bleeding results in chronic inflammation, giving rise to a haematocele which often resembles a pelvic mass. Unlike ectopic pregnancy, the level of serum human chorionic gonadotropin (hCG) in patients with CEP is usually low or undetectable as chorionic villi are generally sparse. Therefore, CEP often poses a specific diagnostic challenge for clinicians, as both biochemical markers and imaging modalities are unreliable in its diagnosis. Nevertheless, in cases where serum bhCG is significantly elevated in the presence of a large pelvic mass, the possibility of a malignant ovarian germ cell tumour (MOGCT) must be considered and investigated appropriately. Here, we present a rare case of a young woman who was referred to a gynaecological cancer centre with an acute abdomen for the treatment of MOGCT but was subsequently diagnosed with CEP following laparotomy. In our case report, we highlight the diagnostic conundrum of CEP and MOGCT and discuss the surgical challenges both these conditions pose, especially as many of these women are young and desire fertility preservation.

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Chronic ectopic pregnancy is a differential diagnosis in women with a complex adnexal mass.

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It may present with low or raised hCG.

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Differentiation between it and germ cell tumour can be challenging.

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Management involves surgical excision following radiological imaging.

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Follow up is required until normalisation of hCG.

Emergency Medicine Myths: Ectopic Pregnancy Evaluation, Risk Factors, and Presentation

BACKGROUND

Ectopic pregnancy (EP) is an important cause of morbidity and mortality in females of reproductive age. Proper diagnosis and treatment are critical, as complications such as rupture, hemorrhagic shock, and even death can occur.

OBJECTIVE

EP is a condition emergency physicians are trained to detect, yet there are multiple myths concerning its evaluation and diagnosis. This article reviews several of these myths in order to improve emergency department (ED) evaluation and diagnosis.

DISCUSSION

EP is a difficult diagnosis and may be missed on initial ED visit. While the diagnosis is often delayed simply due to very early presentations, it can also be missed because patients may not have all the same risk factors or demonstrate the same symptoms. They may also not demonstrate the same serum B-human chorionic gonadotropin levels and trends or have the same ultrasound findings at equivalent gestational ages. Some patients with early EP may have positive ultrasound findings with serum β-hCG levels under a defined discriminatory zone (DZ). On the other hand, some patients with an early viable intrauterine pregnancy may have no visible findings on initial ultrasound, but have serum β-hCG (quantitative) levels well above the DZ. Although rare, EP has even been demonstrated in women with negative urine β-hCG tests or low serum β-hCG levels.

CONCLUSIONS

While EP may be a challenging diagnosis, understanding the myths surrounding EP may help emergency physicians consider it, even when patient risk factors, symptoms, or ED laboratory or imaging studies do not initially or easily define the diagnosis.

A Ruptured Ectopic Pregnancy Presenting with a Negative Urine Pregnancy Test

A negative urine pregnancy test in the emergency department traditionally excludes the diagnosis of pregnancy. We report a rare case of ruptured ectopic pregnancy in a patient with a negative urine pregnancy test but with a serum beta-human chorionic gonadotropin (β-hCG) of 10 mIU/mL. The patient developed hemoperitoneum and required laparoscopy by Obstetrics and Gynecology (OB/Gyn). This case highlights the fallibility of the urine pregnancy test in diagnosing early pregnancy.

Chronic tubal ectopic pregnancy: a rare but challenging diagnosis

A 34-year-old woman without any medical history presented to our hospital emergency unit with a history of 4 days of progressively increasing pain in the left iliac fossa, fever and vaginal bleeding for the past 3 weeks. Urine pregnancy test and serum bhCG were negative. CT scan showed a left pelvic mass compatible with a tubo-ovarian abscess. After transfer to our gynaecology unit, transvaginal ultrasound revealed an empty uterus with a heterogeneous mass in the left adnexal area. We performed a laparoscopy, which revealed an enlarged left haematosalpinx with firm adhesions to the surrounding organs, but no abscess. A total left salpingectomy was undertaken and the histopathological examination revealed the presence of chorionic villi, suggesting the diagnosis of chronic ectopic tubal pregnancy. The postoperative course was uneventful.

Rupture of Ovarian Pregnancy in a Woman with Low Beta-hCG Levels

Background. Ovarian pregnancy is a rare form of ectopic pregnancy. It is often difficult to distinguish from tubal pregnancy, and diagnosis and management are frequently a challenge. Case. A 33-year-old nulligravida woman presented with light vaginal bleeding and bilateral lower quadrants abdominal pain. Beta-human chorionic gonadotropin (beta-hCG) level (592 mUI/mL) and clinical and ultrasound (US) findings were suspicious for tubal pregnancy. On the third day, despite beta-hCG decrease (364 mUI/mL), she complained of severe pain in the lower abdomen, and physical examination revealed abdominal rebound tenderness. US showed a large amount of fluid in the abdominal cavity. Because of the unstable clinical condition, emergency laparoscopy and resection of left ovarian ectopic pregnancy were performed. Histology confirmed ovarian gestation. Conclusion. This case shows that ectopic pregnancy rupture may occur despite low levels of beta-hCG. Hemoperitoneum is not contraindication to laparoscopy.

Case of chronic ectopic pregnancy diagnosed in which the complete shape of the fetus was visible by ultrasonography

Preoperative diagnosis of chronic ectopic pregnancy is often difficult because of the high incidence of negative results on pregnancy tests as a consequence of the very small amount of live villi, subtle symptoms, and the poor specificity of ultrasonographic patterns. A 45-year-old woman was referred to our department for evaluation of a mass 8 cm in diameter with solid parts in the right adnexal area. Transvaginal ultrasonography showed a mass consisting of a cystic part with an irregular thick capsule distinct from the right ovary. In the center of the cystic part, a fetus-like image, 20 mm in length was seen. Preoperative diagnosis was confirmed by the laparoscopy, which revealed a swollen right tube containing a fetus with highly necrotic changes. This case was unique because chronic ectopic pregnancy was detected at an early stage before absorption of the conceptus occurred, which coincidentally is an appropriate time for morphological diagnosis.

Chronic Ectopic Pregnancy

Acute ectopic pregnancy is a common clinical problem, usually diagnosed by a combination of clinical, sonographic, and laboratory findings. Chronic ectopic pregnancy is a more unusual situation, resulting from minor ruptures that develop into a hematocele. The typical patient will have subacute or chronic pain and a low β-HCG. The sonographic findings in these cases can vary between an amorphous, avascular mass and a highly vascular complex. In the appropriate clinical setting, sonography can play an important role in the preoperative diagnosis of this entity.

Role of sonography in the diagnosis of ectopic pregnancy

This review addresses the use of sonography in the evaluation of patients suspected of having ectopic pregnancy. The use of transvaginal and transabdominal sonography and the role of Doppler imaging in the early diagnosis of ectopic pregnancy are discussed. Various sonographic findings and pitfalls of ectopic pregnancy are analyzed, with emphasis on their diagnostic efficacies.

Hemorrhagic shock from a ruptured ectopic pregnancy in a patient with a negative urine pregnancy test result

Ectopic pregnancy has been increasing in frequency over the past 2 decades. The sudden rupture of a fallopian tube caused by ectopic pregnancy can lead to hemorrhagic shock and death if not diagnosed and treated in a timely fashion. The emergency physician is often the health professional that is called on to make the diagnosis and coordinate timely and effective intervention. The first step in the diagnosis of ectopic pregnancy is demonstration of pregnancy by means of a rapidly performed and sensitive qualitative urine test for the beta-subunit of human chorionic gonadotropin (beta-hCG). A negative urine pregnancy test result will generally be used to exclude ectopic pregnancy from further consideration. The following is a report of a patient presenting to an emergency department with hypovolemic shock in conjunction with 2 negative urine beta-hCG analysis results and a quantitative serum beta-hCG level of 7 mIU/mL, a value less than the lower limit of detection for the highly sensitive qualitative urine and serum tests. This case report demonstrates the importance of further consideration of the diagnosis of ectopic pregnancy in the setting of a negative urine pregnancy test result.

Anticardiolipin antibodies in ectopic pregnancies

BACKGROUND

Anticardiolipin auto-antibodies are known to be inflicted in recurrent pregnancy losses and other adverse outcomes of pregnancy. However, their role in extrauterine pregnancies is unknown.

OBJECTIVE

To clarify the association between anticardiolipin antibodies and extrauterine pregnancies.

PATIENTS AND METHODS

About 30 patients with ectopic pregnancies confirmed histologically and 40 control subjects with intrauterine pregnancies were studied. Mean duration of pregnancy was 38 and 39 days, respectively. Serum levels of IgG, IgA, and IgM antibodies against cardiolipin were measured. In addition, measurements of human chorionic gonadotropin (beta hCG) and progesterone were made.

RESULTS

Mean levels of IgA and IgM but not IgG antibodies were significantly higher in patients with ectopic pregnancies than in normal pregnant women. Distribution frequency histograms revealed that a subgroup of ectopic pregnancies exhibit antibody titers corresponding to that of intrauterine pregnancies, and others showing elevated levels. Markedly elevated antibody levels were observed in patients having low levels of beta hCG and/or progesterone.

CONCLUSION

In view of the inflammatory events associated with some cases of ectopic pregnancies, elevated levels of anticardiolipin auto-antibodies may give clues to pathogenesis. Determination of IgM antibodies may help discriminate ectopic pregnancies with auto-immune pathogenesis from those caused by other factors.