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      Complications and outcomes of pregnant women with adenomyosis in Japan


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          To investigate the impact of adenomyosis on the complications and outcomes of pregnancy in Japan.


          We carried out a multicenter retrospective questionnaire survey. A questionnaire regarding pregnancy complications and the outcomes of pregnancy was sent to 725 facilities.


          Data were obtained on the cases of 272 pregnant women with adenomyosis from 65 facilities. The complications of pregnancy included miscarriage before 12 weeks of pregnancy (14.8%), miscarriage after 12 weeks of pregnancy (9.9%), preterm delivery (24.4%), fetal growth restriction (11.8%), pregnancy‐induced hypertension (9.9%), intrauterine infection (7.3%), and cervical incompetency (5.3%). The rates of pregnancy complications in the three groups classified according to pretreatment for adenomyosis (no pretreatment, medication, surgery) did not differ to a statistically significant extent. The rates of miscarriage (>12 weeks) and cervical incompetency increased according to the size of the adenomyosis. The rates of pregnancy‐induced hypertension and uterine infection in patients with diffuse‐type adenomyosis were higher than that in patients with focal‐type adenomyosis.


          Our results show that the increased size and diffuse type of adenomyosis are associated with adverse pregnancy outcome. We should be aware of the higher incidence of pregnancy‐induced hypertension and uterine infection in patients with diffuse‐type adenomyosis.

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          Most cited references 25

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          Adenomyosis in endometriosis--prevalence and impact on fertility. Evidence from magnetic resonance imaging.

           P. Huppert,  D Beil,  M Noe (2005)
          The hypothesis is tested that there is a strong association between endometriosis and adenomyosis and that adenomyosis plays a role in causing infertility in women with endometriosis. METHODS. Magnetic resonance imaging of the uteri was performed in 160 women with and 67 women without endometriosis. The findings were correlated with the stage of the disease, the age of the women and the sperm count parameters of the respective partners. The posterior junctional zone (PJZ) was significantly thicker in women with endometriosis than in those without the disease (P<0.001). There was a positive correlation of the diameter of the PJZ with the stage of the disease and the age of the patients. The PJZ was thicker in patients with endometriosis with fertile than in patients with subfertile partners. The prevalence of adenomyotic lesions in all 160 women with endometriosis was 79%. In women with endometriosis below an age of 36 years and fertile partners, the prevalence of adenomyosis was 90% (P<0.01) With a prevalence of up to 90%, uterine adenomyosis is significantly associated with pelvic endometriosis and constitutes an important factor of sterility in endometriosis presumably by impairing uterine sperm transport.
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            Distribution of cyclooxygenase-2 in eutopic and ectopic endometrium in endometriosis and adenomyosis.

            The objective of this study was to determine the distribution of cyclooxygenase-2 (COX-2) in eutopic and ectopic endometria in endometriosis and adenomyosis. The subjects were 35 patients with endometriosis diagnosed by laparoscopy, 33 patients with histologically confirmed adenomyosis and 50 female controls with normal fecundity. Expression of COX-2 was immunohistochemically investigated in tissues from eutopic endometrium and myometrium and ectopic endometrium of the wall of ovarian chocolate cysts using polyclonal antibody. Surface epithelial cells, endometrial glandular epithelial cells or stromal cells were assessed. Cells were semi-quantitatively assessed on a scale of 1 to 5 using a nomogram created from positive cell count and the degree of staining. COX-2 expression in surface and glandular epithelia of the control group varied markedly during the menstrual cycle. It was lowest in the early proliferative phase and gradually increased thereafter. It remained high throughout the secretory phase. However, in patients with endometriosis, expression of COX-2 in glandular epithelium was higher than that in the control group, though it varied throughout the menstrual cycle. On the other hand, there was no variation in expression of COX-2 in the adenomyosis group during the menstrual cycle, and it was lower than that in the endometriosis group in all phases. Pronounced COX-2 expression was observed in glandular cells from ectopic endometrial tissue of ovarian chocolate cyst walls in all cases regardless of the menstrual phase. In summary, increased COX-2 expression in eutopic and ectopic endometria was believed to be strongly correlated with pathological abnormalities in these disorders.
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              Pathophysiology of adenomyosis.

               A. Ferenczy (2015)
              Adenomyosis refers to endometrial glands and stroma located haphazardly deep within the myometrium. Similar histological alterations may be found in extrauterine locations such as the rectovaginal septum. The aetiology and pathogenic mechanism(s) responsible for adenomyosis are poorly understood. Both human and experimental studies favour the theory of endomyometrial invagination of the endometrium, although the de-novo development of adenomyosis from Mullerian rests in an extrauterine location is a possibility. The prerequisite for adenomyosis may be triggered or facilitated by either a 'weakness' of the smooth muscle tissue or an increased intrauterine pressure or both. Relatively high oestrogen concentrations and impaired immune-related growth control in ectopic endometrium may be necessary for the maintenance of adenomyosis. Smooth muscle cell hyperplasia and hypertrophy are a reflection of reactive change secondary to ectopic endometrial proliferation. Further studies are needed for insight into the precise aetiology and pathogenesis of adenomyosis. Adenomyosis is a relatively frequent endomyometrial pathology discovered in multiparous women between 40 and 50 years of age. About 2/3 of women are symptomatic with menorrhagia and dysmenorrhoea; 80% of adenomyotic cases are associated with leiomyomata uteri; and in women with endometrial adenocarcinoma, adenomyosis is relatively often seen. Definite diagnosis is made on hysterectomy specimens, although attempts are made at securing preoperative diagnosis by magnetic resonance imaging and myometrial biopsies. Definite treatment of symptomatic women is hysterectomy.

                Author and article information

                Reprod Med Biol
                Reprod. Med. Biol
                Reproductive Medicine and Biology
                John Wiley and Sons Inc. (Hoboken )
                21 August 2017
                October 2017
                : 16
                : 4 ( doiID: 10.1111/rmb2.2017.16.issue-4 )
                : 330-336
                [ 1 ] Department of Obstetrics and Gynecology Yamaguchi University Graduate School of Medicine Ube Japan
                [ 2 ] Department of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan
                [ 3 ] Department of Obstetrics and Gynecology Juntendo University School of Medicine Tokyo Japan
                [ 4 ] Department of Obstetrics and Gynecology Yokohama City University Hospital Yokohama Japan
                [ 5 ] Saint Mother Obstetrics and Gynecology Clinic Institute for ART Fukuoka Japan
                [ 6 ] Department of Obstetrics and Gynecology Shiga University of Medical Science Otsu Japan
                Author notes
                [* ] Correspondence

                Hiroshi Tamura, Department of Obstetrics and Gynecology, Yamaguchi University Graduate School of Medicine, Ube, Japan.

                Email: hitamura@ 123456yamaguchi-u.ac.jp

                © 2017 The Authors. Reproductive Medicine and Biology published by John Wiley & Sons Australia, Ltd on behalf of Japan Society for Reproductive Medicine.

                This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

                Page count
                Figures: 1, Tables: 3, Pages: 7, Words: 5040
                Original Article
                Original Articles
                Custom metadata
                October 2017
                Converter:WILEY_ML3GV2_TO_NLMPMC version:5.2.7 mode:remove_FC converted:04.12.2017


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