Predicting the results of uterine artery embolization: correlation between initial intramural fibroid volume and percentage volume decrease

A rare case of venous sinus thrombosis and pulmonary embolisms secondary to myomatous erythrocytosis syndrome

Myomatous erythrocytosis syndrome is a rare phenomenon of secondary polycythemia evolving from uterine leiomyoma. Although the underlying pathology is still unknown, patients have an increased risk of venous thrombosis. A 44-year-old GO (gravida zero) presented with an incidental finding of secondary polycythemia, and a diagnosis of myomatous erythrocytosis syndrome was made because of her large uterine fibroids. She was placed on therapeutic anticoagulation after developing pulmonary embolisms and a dural sinus venous thrombosis. Subsequently, she underwent uterine artery embolization, which resulted in a substantial decrease in her erythropoietin (8.1 mU/mL) along with hemoglobin (15.1 g/dL) and hematocrit (4 5g/dL). Myomatous erythrocytosis syndrome can cause venous thrombosis, leading to neurologic complications. In patients with increased risk for surgery, uterine artery embolization is an effective option for treatment.

Uterine artery embolization in Tanzania: a procedure with major public health implications

BACKGROUND

The burden of uterine fibroids is substantial in sub-Saharan Africa (SSA), with up to 80% of black women harboring them in their lifetime. While uterine artery embolization (UAE) has emerged as an effective alternative to surgery to manage this condition, the procedure is not available to the vast majority of women living in SSA due to limited access to interventional radiology (IR) in the region. One of the few countries in SSA now offering UAE in a public hospital setting is Tanzania. This study aims to assess the safety and effectiveness of UAE in this new environment.

METHODS

From June 2019 to July 2022, a single-center, retrospective cohort study was conducted at Tanzania's first IR service on all patients who underwent UAE for the management of symptomatic fibroids or adenomyosis. Patients were selected for the procedure based on symptom severity, imaging findings, and medical management failure. Procedural technical success and adverse events were recorded for all UAEs. Self-reported symptom severity and volumetric response on imaging were compared between baseline and six-months post-procedure using paired sample t-tests.

RESULTS

During the study period, 92.1% (n = 35/38) of patients underwent UAE for the management of symptomatic fibroids and 7.9% (n = 3/38) for adenomyosis. All (n = 38/38) were considered technically successful and one minor adverse event occurred (2.7%). Self-reported symptom-severity scores at six-months post-procedure decreased in all categories: abnormal uterine bleeding from 8.8 to 3.1 (-5.7), pain from 6.7 to 3.2 (-3.5), and bulk symptoms from 2.8 to 1 (-1.8) (p < 0.01). 100% of patients reported satisfaction with outcomes. Among the nine patients with follow-up imaging, there was a mean volumetric decrease of 35.5% (p = 0.109).

CONCLUSIONS

UAE for fibroids and adenomyosis can be performed with high technical success and low complication rates in a low-resource setting like Tanzania, resulting in significant symptom relief for patients. Building capacity for UAE has major public health implications not only for fibroids and adenomyosis, but can help address the region's leading cause of maternal mortality, postpartum hemorrhage.

Comparison of two invasive non-surgical treatment options for uterine myomas: uterine artery embolization and magnetic resonance guided high intensity focused ultrasound-systematic review

BACKGROUND

Uterine Artery Embolization (UAE) and Magnetic Resonance guided High Intensity Focused Ultrasound (MRgHIFU) are two noninvasive treatments for uterine leiomyoma.

METHODS

This systematic review, following PRISMA guidelines, analyzed the effectiveness of two treatments by comparing percent fibroid volume shrinkage immediately after the procedure and after 3, 6, 12 and 24 months of follow-up and also assessed and compared common complications following treatment. The search utilized Science Direct, PubMed, MEDLINE, Google Scholar and BioMed Central databases, selecting manuscripts published during the period 2000 and 2020. Studies with premenopausal patients with previous treatments for uterine leiomyoma and/or with other pelvic diseases were excluded.

RESULTS

Twenty-nine papers satisfied inclusion and exclusion criteria. Results were pooled and stratified by treatment and follow-up time. Weighted fibroid volume percent shrinkage after UAE was statistically significantly greater than MRgHIFU at 6, 12, and 24 months follow-up times. However, UAE had statistically significantly more complications, such as pain, nausea and vomiting. However, this study cannot conclude that UAE is more effective than MRgHIFU due to confounding factors.

Value of Dyna CT in guiding embolization during transarterial uterine artery embolization of fibroids

The present study aimed to assess the usefulness of Dyna CT during transarterial uterine artery embolization (UAE) of fibroids. A total of 65 patients with symptomatic submucosal and intramural fibroids scheduled for transarterial UAE at the First People's Hospital of Changhou between May 2016 and September 2018 were included. Dyna CT and routine digital subtraction angiography (DSA) were performed in all patients during angiographic embolization of the bilateral internal iliac arteries. The visualization qualities of uterine artery origin and fibroids, as imaged by Dyna CT, were compared with DSA anterior-posterior images. Dyna CT provided excellent 3-dimensional visualization of vascular structures of the bilateral internal iliac arteries and uterine artery origin. Dyna CT was primarily useful in patients with overlapped uterine arteries or complex vascular anatomies on DSA anterior-posterior images (Dyna CT 100% vs. DSA anterior-posterior 69.2%, P=0.03). However, stained fibroids were identified in 57/65 cases (87.7%) by Dyna CT, and in all of the cases (100%) by DSA anterior-posterior imaging (P=0.03). Dyna CT is not suitable for procedural evaluation when used alone for transarterial UAE of fibroids. However, Dyna CT is an excellent supplement to DSA anterior-posterior imaging, as it provides additional information to aid in treatment planning.

Evaluation of Uterine Artery Embolization on Myoma Shrinkage: Results from a Large Cohort Analysis

Objective:

There are still contradictory opinions on the success rates of uterine artery embolization (UAE) for the treatment of myomas. In this scenario, our study aims to assess the effect of UAE on myoma shrinkage.

Materials and Methods:

The study included 337 women in reproductive age affected by a single symptomatic intramural myoma and declined surgery, undergoing UAE. The uterus and myoma diameters and volumes were determined on ultrasonographic scans before and 3, 6, and 12 months after the procedure.

Results:

The mean uterine volume before intervention was 226.46 ± 307.67 mm³, whereas myoma volume was 51.53 ± 65.53 mm³. Further myoma progression was registered in only four patients. In remaining women, uterus volume in average decreased for 149.99 ± 156.63 mm³, whereas myomas decreased for 36.57 ± 47.96 mm³. The mean volume reduction rate of the uterus was 49.54 ± 35.62 and for myoma was 57.58 ± 30.71. A significant decrease in both uterine and myoma volume was registered in every stage of the follow-up. The highest average decrease in uterine volume was in the first 3 months and myoma volume between 3 and 6 months following UAE. After 12 months follow-up, successful outcome (volume regression >50% respect to the baseline) was registered for uterus in 97.4% and for myoma in 67.9% of investigated patients.

Conclusion:

UAE was proven to allow a good success rate and can be considered as an effective alternative procedure for myoma treatment.

The utility of apparent diffusion coefficients for predicting treatment response to uterine arterial embolization for uterine leiomyomas: a systematic review and meta-analysis

PURPOSE

Apparent diffusion coefficient (ADC) values, which are derived from diffusion-weighted imaging, have a potential role for predicting treatment response. A systematic review was conducted to examine the value of baseline ADC values for predicting leiomyoma size reduction after uterine arterial embolization (UAE).

METHODS

Study selection, quality appraisal and data extraction were conducted independently by two authors. Statistical analyses included the calculation of weighted means and summary correlation coefficients (under the random effects model).

RESULTS

Eleven studies consisting of a total of 258 patients (age, weighted mean±standard deviation [SD], 43.1±10.1 years) were included. The weighted mean±SD ADC value was 1.2±1.5 ×10-3 s/mm2 at baseline (ten studies) and 1.3±2.8 ×10-3 s/mm2 at approximately 6 months after embolization (six studies). The weighted mean percentage leiomyoma volume reduction (VR) at 6 months was 47.1%±35.6% (seven studies). Based on four studies, the weighted summary correlation coefficient for the correlation between baseline ADC and leiomyoma VR at approximately 6 months was not significant (r=0.40; 95% CI, -0.07 to 0.72; I2=69.7%). No associations were found in three of the four studies that examined changes in ADC values as a predictor.

CONCLUSION

Due to high heterogeneity, it is unclear whether ADC may be useful for predicting treatment responses to UAE.

Uterine artery embolization in the treatment of symptomatic fibroids - state of the art 2018

Uterine fibroids are considered to be the most common benign tumours in females. The vast majority of these tumours are incidental findings and do not require any treatment. Symptomatic fibroids, with ailments such as abnormal uterine bleeding, dysmenorrhoea, pelvic pain, impaired urination, bowel dysfunction, infertility, and recurrent pregnancy loss, are indicated for medical treatment. Surgery remains a first-line treatment of symptomatic uterine fibroids; however, minimally invasive techniques and pharmacological management have become more available and popular. Among minimally invasive techniques uterine artery embolization (UAE) is the most well-established uterine preserving treatment. UAE was first introduced in obstetrics and gynaecology in 1987 and since then many studies have shown the safety and efficacy of UAE in fibroid treatment with low rates of complications. In this review we present a novel approach to UAE, which reflects the current state of knowledge based on recent clinical trials and long-term post-procedural follow-up.

Comparison of the influence of three fibroid treatment options: supracervical hysterectomy, ulipristal acetate and uterine artery embolization on ovarian reserve - an observational study

BACKGROUND

To assess and compare the influence of three fibroid treatment options: supracervical hysterectomy, ulipristal acetate and uterine artery embolization on ovarian reserve.

METHODS

Prospective, observational, open-label study performed at the 3rd Chair and Department of Gynecology of the Medical University of Lublin, Poland. Premenopausal Caucasian women with symptomatic uterine fibroids were recruited into 3 groupspatients qualified for supracervical hysterectomies; patients qualified for preoperative ulipristal acetate (UPA) treatment scheduled for supracervical hysterectomies or myomectomies; patients qualified for uterine artery embolization (UAE). The following markers of ovarian reserve were investigated: antral follicle count (AFC), anti-Mullerian hormone (AMH), inhibin B (INHB), follicle stimulating hormone (FSH) and estradiol (E2). These markers were assessed before and 3 months after supracervical hysterectomies, before and 3 months after UAEs, and before and after 3 months of UPA treatment, before the scheduled surgeries. Baseline characteristics (age, parity, dominant fibroid volume, hemoglobin level, BMI, as well as AFC, AMH, INHB, FSH and E2) were compared between the study groups by Kruskall-Wallis ANOVA. Pre- and post-interventional values of AFC, AMH, INHB, FSH and E2 in the studied groups were compared with the Wilcoxon matched pairs test.

RESULTS

Twenty-six, 27 and 30 patients were included in the final analysis in the supracervical hysterectomy, UPA and UAE groups, respectively. Three months after supracervical hysterectomy INHB and E2 significantly decreased, while AFC, AMH and FSH remained unchanged. After 3 months of UPA treatment the values of all the assessed markers of ovarian reserve were not significantly different in comparison to baseline. Conversely, three months after UAE the values of AFC, AMH, INHB, and E2 were significantly decreased, while FSH was significantly increased.

CONCLUSIONS

Of the compared fibroid treatment methods UAE seems to have the greatest impact on ovarian function and should not be offered to patients concerned about their ovarian function. Supracervical hysterectomy did not affect the most accurate markers of ovarian reserve, and therefore appears to be safe in terms of ovarian function. UPA did not change any of the studied markers of ovarian reserve and seems a reasonable option when ovarian function is concerned.

3D Power Doppler vascular indices as a novel technique in assessing the outcome of minimally invasive techniques in uterine fibroids treatment

Uterine fibroids are considered to be the most frequent female benign tumours. The most common reported symptoms of fibroids are heavy menstrual bleeding and painful menstruation, pelvic pain, urinary problems, constipation, as well as infertility and recurrent pregnancy loss. The mainstay of fibroid treatment is surgery, but nowadays minimally-invasive techniques are growing in popularity. Vascularity of fibroids may play a role in the outcome of these techniques, which is why it is important to find an objective, reproducible technique to measure the vascularization before and after the procedure. The 3D Power Doppler vascular indices (3DPDVI) allow objective assessment of vascularization in the entire volume of the tumour. Initially this technique was mostly used in experimental imaging phantoms, but recently many studies focus on the clinical utility of this technique. Power Doppler allows to obtain information on vascularity in the area of interest, while 3DPDVI can be objectively calculated by the Virtual Organ Computer-aided AnaLysis (VOCAL™) software. 3DPDVI showed high reproducibility in most of the studies. This technique has an important role in monitoring the outcome of minimally invasive procedures in fibroid treatment, because they affect vascularity of the tumours. Although there are some limitations of 3DPDVI, it seems that their application may be an effective tool in objective assessment of vascularity of fibroids. However further studies are required to consolidate the usage of 3DPDVI in clinical practice.

Uterine fibroid therapy using interventional radiology mini-invasive treatments: current perspective

Uterine fibroids are common benign tumors of unclear etiopathology that affect the female reproductive tract. They are responsible for considerable morbidity and deterioration of life quality, and may have a negative impact on the reproductive system as well. Besides surgery aided by uterus-saving techniques, several minimally invasive procedures are now available within the field of interventional radiology that represent a valid solution for women who desire pregnancy and relief from disease-specific symptomatology. The main advantages offered by these techniques are low grade of invasiveness and short times of hospitalization. The most diffuse techniques are uterine artery embolization (UAE) and magnetic resonance-guided high-intensity focused ultrasound (MRgFUS). UAE is an endovascular procedure whose goal is obtained by provoking ischemia of the uterine vessels. MRgFUS is a thermoablation procedure that selectively ablates the symptomatic fibroids. In this review study, both procedures will be described, including a description of technical details, indications, contraindications, complications, and outcomes.