MRI and Adenomyosis: What Can Radiologists Evaluate?

Imaging and molecular features of adenomyosis after menopause

OBJECTIVES

To explore the imaging features and the molecular characterization of adenomyosis after menopause.

STUDY DESIGN

An observational cross-sectional study was performed in a group of postmenopausal patients undergoing a transvaginal ultrasound (TVUS) (n = 468). Among those presenting the US criteria for adenomyosis, also confirmed by magnetic resonance imaging (MRI), previous menstrual symptoms, gynecological and obstetric history were reviewed. In a subgroup undergoing hysterectomy, uterine specimens were analyzed by histology and expression of genes implicated in the epithelial-mesenchymal transition, inflammation and fibrosis, including the sphingosine-1-phosphate (S1P) pathway, was evaluated and compared to matched non-menopausal adenomyosis specimens.

MAIN OUTCOME MEASURES

Direct and indirect US features of adenomyosis according to Morphological Uterus Sonographic Assessment at TVUS. Molecular characterization of postmenopausal versus pre-menopausal adenomyosis samples.

RESULTS

According to TVUS and MRI, adenomyosis was identified in 49 patients (10.4 %). On US, diffuse adenomyosis was the most common phenotype, whereas internal adenomyosis with diffuse pattern and asymmetric type was the most prevalent on MRI. Molecular analysis showed that adenomyosis lesions express markers of epithelial-mesenchymal transition, inflammation and fibrosis also in postmenopausal women. By comparing the results with those from pre-menopausal samples, the expression of α smooth muscle actin (αSMA), a marker of fibrosis, was significantly greater after menopause, and altered S1P catabolism and signaling were observed.

CONCLUSIONS

Adenomyosis may be identified in postmenopausal women by imaging, either TVUS or MRI, and fibrosis is one of the key features on molecular analysis.

Establishment and validation of a nomogram model for predicting adverse pregnancy outcomes of pregnant women with adenomyosis

PURPOSE

To establish a reliable nomogram model to predict the risk of major adverse pregnancy outcomes in pregnant women with adenomyosis, and to provide a reference tool for the hierarchical management and the prenatal examination of pregnant women.

METHODS

We collected the clinical data of pregnant women with adenomyosis who were treated in the First Affiliated Hospital of Chongqing Medical University, the Women and Children's Hospital of Chongqing Medical University, and Yubei District People's Hospital of Chongqing from January 2014 to June 2020. They were divided into the training cohort and the validation cohort, respectively. In the training cohort, we screened out risk factors associated with major adverse pregnancy outcomes and established a model, which was subsequently validated.

RESULTS

In the training cohort, we found that previous parity, natural conception or not, type of adenomyosis, with or without endometriosis, history of infertility or adverse pregnancy outcomes, and history of uterine body surgery were associated with major adverse pregnancy outcomes of pregnant women with adenomyosis, and based on these factors, a nomogram model was constructed. The calibration curves of the model were well fitted in both the training and validation cohorts. The receiver-operating characteristic curve (ROC curve) showed that the area under the curve (AUC) was 0.873 and 0.851 in the training and validation cohorts, respectively. The optimal risk threshold of the model was 0.22, and this threshold can be applied to risk stratification of pregnant women.

CONCLUSION

The nomogram model established in this study can reliably predict the risk of major APO in pregnant women with AD.

Percutaneous cryoablation of symptomatic uterine adenomyomas: Initial experience

OBJECTIVE

To assess the efficacy and safety of percutaneous image-guided cryoablation of adenomyomas MATERIAL AND METHODS: Five symptomatic women who wanted to preserve their uterus and fertility underwent a single session of percutaneous image-guided cryoablation of adenomyoma. Three to six 17-gauge cryoprobes were introduced percutaneously into the adenomyoma under ultrasound and laparoscopy guidance. Clinical efficacy was defined as the diminution of the Visual Analogue Scale of pain (VAS), the decrease in uterine bleeding and the improvement of quality of life assessed by the endometriosis health profile 5 (EHP-5) 12 months after treatment. Technical efficacy was defined by the reduction in volume of each treated adenomyoma on MRI. Complications were classified using the Clavien-Dindo classification system. Hysterosonography was performed at least 3 months after the procedure.

RESULTS

Compared to the baseline, all symptom scores had decreased after 12 months: median VAS 8/10 (range, 5-10) to 4/10 (range, 0-7); median dyspareunia score 7/10 (range, 0-10) to 2/10 (range, 0-8); median bleeding score 335 (range, 102-920) to 76 (range, 0-88); median EHP-5 score 60/100 (range, 50-75) to 50/100 (range, 32-55). The median volume of adenomyosis decreased from 57 cm3 (range, 8-87) to 9 cm3 (range, 2-45) at 12 months. No postoperative complications occurred. Two patients had incomplete intrauterine adhesions that were easily removed hysteroscopically.

CONCLUSION

Cryoablation may be a promising alternative treatment for symptomatic adenomyoma in women who want to preserve their uterus.

A method for isolating and culturing ectopic epithelial and stromal cells to study human adenomyosis

PURPOSE

Although adenomyosis is a common and benign gynecological disease, the specific pathogenesis of this condition is yet to be fully elucidated. It is difficult to culture primary cells of the ectopic endometrial epithelia and stroma from human adenomyosis lesions. Most of the previous of studies on adenomyosis were based on primary eutopic endometrium cells. However, as yet, no efficient protocols have been developed for the isolation, culture or purification of primary ectopic epithelial and stromal cells from human adenomyosis lesions. Therefore, the present study aimed to develop an efficient protocol for the isolation and culture of primary ectopic epithelial and stromal cells from human adenomyosis lesions.

METHODS

In the present study, we aimed to obtain ectopic endometrium tissue from human adenomyosis foci and use a simple and operable type I collagenase digestion method for primary culture. Cells were isolated by sterile cell strainer filtration and flow cytometry was performed to identify, purify, and evaluate the viability of isolated ectopic endometrial cells.

RESULTS

Using our method, we successfully isolated and cultured highly purified and active ectopic endometrial epithelial and stromal cells from human adenomyosis foci. Ep-CAM was expressed in ectopic epithelial cells of human adenomyosis with a purity of 93.74% and a viability of 80.58%. In addition, CD10 were robustly expressed by ectopic stromal cells in human adenomyosis. Cellular purity and viability were determined to be 96.37 and 93.49%, respectively.

CONCLUSION

Our method provides a new experimental model for studying the molecular pathogenesis of human adenomyosis.

Understanding Ultrasound Features that Predict Symptom Severity in Patients with Adenomyosis: a Systematic Review

Adenomyosis is associated with pelvic pain, abnormal uterine bleeding, and infertility. Several ultrasound-based classifications have been reported, but it is not clear which criteria reflect the severity of symptoms. The aim of this review is to summarize the ultrasound features that correlate with clinical manifestations of adenomyosis and to discuss diagnostic methods for predicting disease severity. A literature search of PubMed and Google Scholar published up to March 2022 was performed. A consensus-based classification was determined primarily by defining the mapping or topography of the lesion. Ultrasound features can be classified into direct (i.e., the presence of ectopic endometrial tissue within the myometrium) and indirect findings (i.e., changes in the myometrial structure and translesional vascularity secondary to myometrial invasion). There are some reports that symptoms are positively correlated with the location and spread of the disease. Indeed, the lesion thickness, diffuse or internal adenomyosis, and focal adenomyosis may be associated with increased risks of dysmenorrhea, abnormal uterine bleeding, and infertility, respectively. Two ultrasound markers (i.e., the presence of heterogeneous myometrium and myometrial cysts) appear to be the criteria most clinicians focus on. However, decision-making on treatment necessity is determined by symptom severity rather than the topography of the lesions. There is currently no consensus that symptom severity can be predicted based on ultrasound features, but the ultrasound-based criteria may be helpful in diagnosing adenomyosis.

Histopathological characteristics of adenomyosis: structure and microstructure

Adenomyosis is a benign uterine disease that pathologically shows endometrial glands and stroma in the myometrium. There are multiple lines of evidence that adenomyosis is associated with abnormal bleeding, painful menstruation, chronic pelvic pain, infertility, and spontaneous pregnancy loss. Pathologists have researched adenomyosis by studying tissue specimens from its first report more than 150 years ago, and differing viewpoints on its pathological alterations have been advanced. However, the gold standard histopathological definition of adenomyosis remains controversial to date. The diagnostic accuracy of adenomyosis has steadily increased due to the continual identification of unique molecular markers. This article provides a brief description of the pathological aspects of adenomyosis and discusses adenomyosis categorization based on histology. The clinical findings of uncommon adenomyosis are also presented to offer a thorough and detailed pathological profile. Furthermore, we describe the histological alterations in adenomyosis after medicinal therapy.

Adenomyosis: An Updated Review on Diagnosis and Classification

Adenomyosis is a commonly diagnosed benign condition characterized by the presence of ectopic endometrial glands within the underlying myometrium. The most common presenting signs and symptoms are abnormal uterine bleeding, chronic pelvic pain, and infertility. The clinical relevance of this condition is evident in both medical and surgical care. Histopathology and imaging studies are used for the diagnosis and classification of adenomyosis, which are hallmarks of the advancement of our ability to diagnose adenomyosis. Importantly, the diagnosis and classification of adenomyosis lacks standardization due to the nature of imaging techniques, features of adenomyosis, and the clinical spectrum of adenomyosis. We reviewed the literature to summarize the available classification systems for adenomyosis and highlight the different imaging approaches and histologic criteria used in diagnosis. Despite the high prevalence of the disease, there is no clear consensus on one classification system. We provide a review of some of the classification systems available and discuss their strengths and limitations.

MRI of endometriosis in correlation with the #Enzian classification: applicability and structured report

Endometriosis represents one of the most common causes of life-impacting chronic pelvic pain and female infertility. Magnetic resonance imaging (MRI) plays an increasing role in the diagnosis and mapping of endometriosis, while diagnostic laparoscopy currently tends to be reserved for the patients with negative imaging results. The #Enzian, published in 2021, proposes a new comprehensive classification system of endometriosis, combining a complete staging of deep infiltrative endometriosis with the evaluation of peritoneal/ovarian/tubal localizations and the presence of adenomyosis. This article addresses in detail the applicability of the #Enzian classification, primarily based on surgical findings, to the MRI evaluation of the endometriosis. Overall, there is a significant matching between MRI features and the #Enzian classification criteria, two different perspectives of endometriosis mapping, with different goals and levels of detail. The main discrepancy lies in the evaluation of tubo-ovarian condition, which is not fully assessable by MRI. Furthermore, as endometriosis is a complex disease, usually multifocal, that can present with a myriad of imaging findings, MRI reporting should be clear and well organized. The authors group, both radiologists and gynecologists, propose a structured MRI report of endometriosis in correlation with the #Enzian classification, merging the detailed anatomical and pre-operative information provided by the MRI with the benefits of a comprehensive classification system of endometriosis in the clinical practice and research field.Critical relevance statement This article addresses in detail the applicability of the #Enzian classification, primarily based on surgical findings, to the MRI evaluation of the endometriosis and proposes a #Enzian-based structured MRI report.

Sonographic features of adenomyosis correlated with clinical symptoms and intraoperative findings: a case-control study

PURPOSE

Adenomyosis is a common disease of females during their reproductive age. As of today, histologic examination of the uterus after hysterectomy constitutes the gold standard for diagnosis. The aim of this study was to determine the validity of sonographic, hysteroscopic, and laparoscopic criteria for the diagnosis of the disease.

METHODS

This study included data collected from 50 women in the reproductive age of 18-45 years, who underwent a laparoscopic hysterectomy in the gynecology department of the Saarland University Hospital in Homburg between 2017 and 2018. The patients with adenomyosis were compared with a healthy control group.

RESULTS

We collected data of anamnesis, sonographic criteria, hysteroscopic criteria and laparoscopic criteria and compared it with the postoperative histological results. A total 25 patients were diagnosed with adenomyosis postoperatively. For each of these; at least three sonographic diagnostical criteria for adenomyosis were found compared with a maximum of two for the control group.

CONCLUSION

This study demonstrated an association between pre- and intraoperative signs of adenomyosis. In this way, it shows a high diagnostic accuracy of the sonographic examination as a pre-operative diagnostic method of the adenomyosis.