Cited by 560Endometriosis Research and TreatmentGynecological conditions and treatmentsEctopic Pregnancy Diagnosis and Management

The DOI matches its Crossref record; 202 of the 217 references it cites were found in a registry or an index; none of the 199 sources its claims cite is checked for support yet.

Endometriosis: Epidemiology, Classification, Pathogenesis, Treatment and Genetics (Review of Literature)

Open access
Smolarz, Beata, Szyłło, Krzysztof, Romanowicz, Hanna·2021·International Journal of Molecular Sciences

Abstract

Endometriosis is a “mysterious” disease and its exact cause has not yet been established. Among the etiological factors, congenital, environmental, epigenetic, autoimmune and allergic factors are listed. It is believed that the primary mechanism of the formation of endometriosis foci is retrograde menstruation, i.e., the passage of menstrual blood through the fallopian tubes into the peritoneal cavity and implantation of exfoliated endometrial cells. However, since this mechanism is also observed in healthy women, other factors must also be involved in the formation of endometriosis foci. Endometriosis is in many women the cause of infertility, chronic pain and the deterioration of the quality of life. It also represents a significant financial burden on health systems. The article presents a review of the literature on endometriosis—a disease affecting women throughout the world.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

Endometriosis is a chronic, estrogen-dependent gynecological disease whose exact cause remains unexplained, with retrograde menstruation, immune dysfunction, and genetic/epigenetic factors implicated. This narrative review covers its history, epidemiology, classification, pathogenesis, diagnosis, treatment, biomarkers, and genetics, emphasizing the lack of a specific biomarker and fully effective therapy.

Key findings

  • Endometriosis affects 10–15% of women of reproductive age and 35–50% of women with pelvic pain and/or infertility; up to 30–50% of affected women may experience infertility, and annual treatment costs in Europe range from €0.8 billion to €12.5 billion.
  • In a prospective cohort of 81,908 women followed from 1991 to 2013, those eating >2 servings/day of red meat had a 56% higher risk of laparoscopically confirmed endometriosis compared with those eating ≤1 serving/week; no association was found for poultry, fish, shellfish, or eggs.
  • Genetic factors are estimated to account for about 50% of predisposition to endometriosis; monozygotic twin co-occurrence exceeds 80%, and GWAS studies implicate loci/genes including WNT4, CDKN2BAS, GREB1, FN1, and ESR2/CYP19A1.
  • No specific biomarker is validated for diagnosis; IL-6 showed 63% sensitivity and 69% specificity, Ca-125 and Ca-19-9 have partial clinical use, and elagolix (150 mg once daily or 200 mg twice daily) reduced moderate-to-severe endometriosis pain, with the 200 mg dose limited to 6 months because of decreased bone mineral density.

Methods

  • Design: narrative literature review (“Review of Literature”) covering endometriosis epidemiology, classification, pathogenesis, treatment, and genetics.
  • Data/sample: no primary study sample; the paper synthesizes published literature, including cohort studies, GWAS, systematic reviews, and clinical trials.
  • Main analysis: narrative synthesis of cited evidence; no systematic search strategy, inclusion criteria, quality assessment, or meta-analysis of the reviewed literature is described.

Limitations

  • Stated in the paper: no specific endometriosis marker has been identified; treatment remains ineffective; miRNA/lncRNA studies are investigatory and require large, independent, clinically characterized cohorts; and no controlled randomized trials have determined whether exercise benefits women with endometriosis.
  • Evident from the text: as a narrative review, it does not report a reproducible literature search, study selection process, or formal quality appraisal, so conclusions depend on the cited sources and may be subject to selection bias.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.3390/ijms221910554

Cites

202 of 202 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

0 of 199 cited sources checked · 0 supported · 0 flagged

Show all 115 claims

  • It may state two separate claims as one. 58
  • Probably not a substantial claim. 25
  • The quote only partly states this claim. 2
73 of 73
  • The paper relies on this without support.

    The ectopic endometrium is functionally similar to the eutopic endometrium.

    “The ectopic endometrium is functionally similar to the eutopic endometrium.”
  • The paper relies on this without support.

    Endometriosis is a benign, estrogen-dependent gynecological disease.

    “Endometriosis is a benign, estrogen-dependent, gynecological disease; however, due to the accompanying ailments and chronic nature, it is a very important medical, social and economic problem.”
  • The paper relies on this without support.

    Endometriosis is chronic and difficult to treat.

    “Treatment of endometriosis is a big medical problem due to the fact that this disease is difficult to treat and is chronic in nature.”
  • The paper relies on this without support.

    Symptoms associated with foci of endometriosis are the main factor determining the need to start treatment.

    “Symptoms associated with the presence of foci of endometriosis are the main factor determining the need to start treatment.”
  • The paper relies on this without support.

    The best therapeutic effects are achieved by combining surgical treatment with pharmacological treatment.

    “The best therapeutic effects are achieved as a result of the combination of surgical treatment with pharmacological treatment.”
  • The paper relies on this without support.

    In women suffering from endometriosis, pelvic floor structures are very often dysfunctional.

    “In women suffering from endometriosis, pelvic floor structures are very often dysfunctional.”
  • The paper relies on this without support.

    Inflammation accompanying recurrent endometriosis can cause tissue damage and formation of adhesions.

    “Inflammation accompanying recurrent endometriosis can cause tissue damage, and thus the formation of scar tissue to heal the affected areas. Unfortunately, a side effect of this process is the formation of adhesions, which, depending on the location, can cause different symptoms.”
  • The paper relies on this without support.

    With peritoneal endometriosis, serum and plasma are not good diagnostic material; attention is paid to the eutopic endometrium.

    “With peritoneal endometriosis, serum and plasma are not good diagnostic material; attention is paid to the eutopic endometrium.”
  • The paper relies on this without support.

    Foci of endometriosis behave in the same way as eutopic endometrium.

    “Foci of endometriosis behave in the same way as eutopic endometrium.”
  • The paper relies on this without support.

    The marker of endometriosis was sought among growth factors and cytokines because the development of ectopic implants is accompanied by invasion, proliferation and angiogenesis.

    “The marker of endometriosis was sought among growth factors and cytokines, because the development of ectopic implants is accompanied by the processes of invasion, proliferation and angiogenesis.”
  • The paper relies on this without support.

    The most promising results for endometriosis markers were obtained for hepatocyte growth factor (HGF), fibroblast growth factor (FGF), epithelial growth factor (EGF), vascular endothelial growth factor (VEGF) and interleukin IL-1, IL-6 and IL-8.

    “The most promising results were obtained for hepatocyte growth factor (HGF), fibroblasts growth factor (FGF), epithelial growth factor (EGF), vascular endothelial growth factor (VEGF) and interleukin IL-1, IL-6 and IL-8.”
  • The paper relies on this without support.

    The most reproducible results for endometriosis markers were obtained for IL-6.

    “The most reproducible results were obtained for IL-6.”
  • The paper relies on this without support.

    YKL-40 is secreted by activated macrophages and neutrophils in various inflamed tissues.

    “YKL-40, a new biomarker of inflammation, is secreted by activated macrophages and neutrophils in various inflamed tissues.”
  • The paper relies on this without support.

    Serum concentrations of YKL-40 are elevated in patients with diseases characterized by inflammation.

    “Serum concentrations of YKL-40 are elevated in patients with diseases characterized by inflammation.”
  • The paper relies on this without support.

    Endometriosis can cause ectopic pregnancy and increases the risk of ectopic pregnancy in women with endometriosis.

    “Endometriosis can be the cause of ectopic pregnancy. The risk of such a pregnancy is therefore increased in women with endometriosis.”
  • The authors state this as an assumption.

    At least some pathogenetic changes in endometriosis arise as somatic mutations absent in the germline and occur during the development of an individual organism.

    “The concept of this research is based on the hypothesis that at least some of the changes arise as a result of somatic mutations absent in the germline and occur during the development of an individual organism.”
  • The paper relies on this without support.

    Endometriosis is associated with cancer as a result of genetic mutations.

    “The association of endometriosis with cancer, which appears as a result of genetic mutations, contributed to the search for pathogenetic mutations occurring in cells during the development of the disease.”
  • The authors state this as an assumption.

    DIE patients with new mutations will be burdened with a higher risk of cancer in the future.

    “However, it can be assumed that these patients will be burdened with a higher risk of cancer in the future [203].”
  • The paper relies on this without support.

    A different expression of aromatase in endometriosis foci compared to eutopic endometrium has been demonstrated.

    “A different expression of aromatase in endometriosis foci has been demonstrated compared to eutopic endometrium.”
19 of 19

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Liu study is cited as Sahin et al.

    Minor

    The text attributes the miR-449b-3p finding to Liu et al. but cites reference 159, which is by Sahin et al. The Liu et al. paper on miR-449b-3p is reference 160.

  • Sahin study is attributed to a different reference

    Minor

    The text attributes the Let-7b findings to Sahin et al. and cites reference 146, but reference 146 is a paper by Sourial et al. The Sahin et al. paper appears as reference 159.

  • Zhou findings are cited to a Liu paper

    Minor

    The text attributes the lncRNA expression counts to Zhou et al. but cites reference 172, which is a Liu et al. paper about H19. The Zhou et al. paper is listed as reference 171.

3 of 3

Citations

Cites

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Show all 217 references

15 of the 217 references couldn’t be matched to a known paper.

Research works printed but not linked: 7

  1. Rokitansky, 1860, Uber uterusdrusen neubildung, Ztchr Gesselsch Arzte Wein, 16, 577
  2. Kanikowska, 2010, Historia badań nad endometriozą, Polski Przegląd Nauk Zdrowiu, 1, 42
  3. Dmowski, 1999, Endometriosis at the end of the millenium; the controversy remains, Pol. J. Gyn. Investig., 1, 175
  4. Gadomska, 1997, Endometrioza, Medipress Ginekol., 3, 2
  5. Jakiel, 2006, Endometriosis, Przeglad Menopauzalny, 2, 126
  6. Witz, 1997, Semin Reprod Endocrinol, Pathogenesis, 15, 199
  7. Basta, 2012, Stanowisko Zespołu Ekspertów Polskiego Towarzystwa Ginekologicznego dotyczące diagnostyki i metod leczenia endometriozy, Ginekol. Pol., 83, 871

Cited by

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Metadata

Authors
Smolarz, B., Szyłło, K., & Romanowicz, H.
Affiliations
Polish Mother’s Memorial Hospital Research Institute (PL)
Corresponding author
Smolarz, Beata
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2021-09-29
Volume
22
Issue
19
Pages
10554
ISSN
1422-0067 (ISSN-L)
OpenAlex
W3202177173
Cited by
560
References
217
Citations by year
2026: 107 · 2025: 144 · 2024: 147 · 2023: 100 · 2022: 60 · 2021: 2
FWCI
12.68
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Endometriosis Research and Treatment
  • Health Sciences › Medicine › Obstetrics and Gynecology › Gynecological conditions and treatments
  • Health Sciences › Medicine › Obstetrics and Gynecology › Ectopic Pregnancy Diagnosis and Management
Keywords
endometriosis, epidemiology, classification, pathogenesis, retrograde menstruation, etiological factors, epigenetics, autoimmune factors, infertility, chronic pelvic pain, quality of life, health care costs, genetics
MeSH terms
Adult, Endometriosis, Endometrium, Female, Gene Expression Regulation, Humans, Infertility, Female, Cytokines, Vascular Endothelial Growth Factor A, Cyclooxygenase 2

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