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ENDOMETRIOSIS:FROM BASIC SCIENCE TO
CLINICAL APPLICATION
T.Z. Jacoeb
Division of Reproductive Immunoendocrinology
Department of Obstetrics and GynecologyFaculty of Medicine University of Indonesia
Jakarta
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WHAT IS
ENDOMETRIOSIS?
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What is endometriosis?
• Endometriosis is the implantation of endometrium-likeglandular and stromal cells outside their normal location in theuterus.
• Varma R, Rollason T, Gupta JK and Maher ER. Endometriosis and the neoplastic process. Reproduction2004;127: 293 –304
• The presence of endometrium-like tissue outside the uterus,
which induces a chronic, inflammatory reaction • Kennedy et al, 2005; Falconer, 2008
• Endometriosis is a chronic benign gynecological diseasecharacterized by the presence of abnormally located tissue(outside the uterine cavity) resembling the endometrium withglands and stroma (endometrial epithelial and stromal cells).
• Zasheva D, Dimitrov R, Stamenova M. Endometriosis and the role of the integrins in the pathogenesis of theendometriosis. Akush Ginekol (Sofiia). 2007;46(5):37-48 .
• Endometriosis is a benign, estrogen-dependent disease withan obscure etiology.
• Contemporary genetic technologies and female reproduction. The Evian Annual Reproduction (EVAR)Workshop Group 2010. Hum. Reprod. Update (November-December 2011) 17 (6): 829-847. doi:10.1093/humupd/dmr033
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What is endometriosis?
• Endometriosis has been considered an enigmatic
„disease‟ because it is often identified when investigating
women with infertility, chronic pelvic pain, dyspareunia
and dysmenorrhea.
• Women with endometriosis have an increased risk of
different types of malignancies, especially ovarian cancer
and non-Hodgkin's lymphoma.
• Contemporary genetic technologies and female reproduction. The Evian Annual Reproduction (EVAR) Workshop
Group 2010. Hum. Reprod. Update (November-December 2011) 17 (6): 829-847. doi: 10.1093/humupd/dmr033
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Basic Sciences Involved in Endometriosis
• Anatomy and Embryology
• Physiology
• Medical Physics
• Biology and MolecularBiology
• Genetics
• Rheology
• Histology, Pathology, andCytology
• Angiology and Angiogenesis
• Biochemistry
• Pharmacology
• Immunology• Reproductive
Immunoendocrinology
• Endocrinology and
Metabolic Diseases• Oncology
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Applied Sciences Involved in
Endometriosis
• Ultrasonography
• Radio-Imaging
• Endoscopy
• Surgery
• Pharmacy
• Informational
Technology
• Bioengineering
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ANATOMY
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Female Genital System
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Typical Locations of Endometriosis Sites
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Blood Supply to the Female Internal Genitalia
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Blood Supply to the Female Internal Genitalia
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Pathogenesis of Endometriosis
• It is likely to be polygenic and multifactorial, but the exact pathogenicmechanisms are still not entirely clear.
• The most widely accepted theory is that of retrograde menstruation inthe context of:• an abnormal immune response, and
• a genetic predisposition to developing endometriotic lesions;• this possibly occur after exposure to an unidentified environmental factor.
• Sasson and Taylor, 2008.
• Zasheva D, Dimitrov R, Stamenova M. Endometriosis and the role of the integrins in the pathogenesis of the endometriosis. Akush Ginekol (Sofiia). 2007;46(5):37-48.
• A better understanding of the pathogenesis of endometriosis mayhelp to identify new pharmacological targets and facilitate thedevelopment of new treatments.
• Contemporary genetic technologies and female reproduction. The Evian AnnualReproduction (EVAR) Workshop Group 2010. Hum. Reprod. Update (November-December2011) 17 (6): 829-847. doi: 10.1093/humupd/dmr033
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Pathogenesis of Endometriosis
Genetic SusceptibilityEnvironmental Factors
Dioxin
Immunological & Cellular Alterations
ENDOMETRIUM FRAGMENTSAngiogenesis
VEGF
Retrograde
Menstruation
IL-8MCP1
Aromatase
E2
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A theoretical model of the development of endometriosis.
Fauser B et al. Hum. Reprod. Update 2011;17:829-847
© The Author 2011. Published by Oxford University Press on behalf of the European Society of
Human Reproduction and Embryology. For Permissions, please email: [email protected].
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1 S b 2012 E d i i B i S i d Cli i l A li i 18
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Critical factors in the pathogenesis of
endometriosis
• Attachment of endometrial cells to the mesothelial cells
• Invasion of endometrial cells into the mesothelium
• Angiogenesis near nascent endometriosis implants
• Proliferation of ectopic endometrial cells
• Recruitment of inflammatory cells that support persistenceof the implants
• Mahutte et.al. In: Olive DL. Endometriosis in Practice (2005:82)
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Obstacles in the Study of Endometriosis
• The study of endometriosis is complicated by a number of factors:
• the presence of different cell types within endometriotic lesions, and
• the involvement of different pathogenic mechanisms in the formation of distinct
types of endometriotic lesion (such as peritoneal, ovarian and rectovaginal)• (Nisolle and Donnez, 1997).
• It may be difficult to distinguish between cause and effect:
• differences in eutopic endometrium between patients with and without
endometriosis, or in eutopic versus ectopic endometrium. • Contemporary genetic technologies and female reproduction. The Evian Annual Reproduction (EVAR)
Workshop Group 2010. Hum. Reprod. Update (November-December 2011) 17 (6): 829-847. doi:
10.1093/humupd/dmr033
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EMBRYOLOGY• Development of Peritoneum• Development of Edometrium
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Three Main Layers in Embryogenesis
• Endoderm
• Mesoderm
• Ectoderm
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The initial stages of human embyogenesis.http://www.digplanet.com/wiki/Human_embryogenesis
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Blastocyst with an inner cell mass and trophoblast.http://www.digplanet.com/wiki/Human_embryogenesis
Nidation and Implantation of Embryo
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Development of female genital organs and tract
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Embryological Development Overview of
Female Genital OrgansDevelopmental Age Feature
Day 28 first primordial germ cells observed
Week 4-7 germ cell proliferation and migration
Week 4-5 (day 28-30) mesonephric tubules form
Week 4-5 (day 28-30) mesonephric ducts (Wolffian) forms
Week 5 (day 31-35)genital ridge forms from coelomic
epithelium thickening
Week 6 (day 35-42) germ cells migrate to dorsal mesentry
Week 6 (day 38-42) budding indifferent gonad
Week 6 (day 40-42)paramesonephric duct (Mullerian)
forms
Week 7 (day 42-48)germ cells migrate into indifferent
gonad
(Table modified from: Kavlock R, Cummings A., 2004. Data originally from Parrott JA, Skinner MK., 1999)
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Development of genital ducts: Indifferent stage
7th week 9th week
p pp 31
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Embryology of the Female Genital Tract
Paramesonephric ducts
(Müllerian ducts)
http://embryology.med.unsw.edu.au/notes/genitalxxuterus.htm#Movies
Müllerian refers to Johannes Peter Müller (1801-1858) a German scientist who specialized in comparative anatomy.
He was the first in 1830 to described the duct named after him, the "Müllerian duct" also called the paramesonephric duct.
Two paramesonephric ducts form from coelomic
epithelium extending beside the mesonephric ducts.
These ducts initially form and then degenerate in the
male.
In the absence of Müllerian Inhibitory Factor theseducts proliferate and grow extending from the vaginal
plate on the wall of the urogenital sinus to lie beside
the developing ovary.
The paired ducts begin to fuse from the vaginal plate
end, forming the primordial body of the uterus and theunfused lateral arms form the uterine tubes.
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Embryology of the Female Genital Tract
Early Fetal Structure
http://embryology.med.unsw.edu.au/notes/genitalxxuterus.htm#Movies
The Müllerian duct (=
paramesonephric duct, preferred
terminology) paired ducts that form
the epithelial lining of female
reproductive organs: uterine tube,uterus, upper vaginal canal.
The term "paramesonephric" duct
means beside the mesonephric
(Wolffian) duct, which is itsanatomical location in early
development.Urogenital sinus of female human embryo of 8.5 to 9 weeks old(From model by Keibel) (Image: Gray's Anatomy)
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Embryology of the Female Genital Tract
Drews U, Sulak O, Schenck PA. Androgens and the development of the vagina. Biol Reprod. 2002 Oct;67(4):1353-9.
PMID: 12297555)
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Genital duct development in female
• Paramesonephric ducts develop into the main genitalducts
• Initially 3 parts can berecognized in each duct:
Cranial vertical portion thatopens into the abdominalcavity....develop into uterinetube
Horizontal part that crossesthe mesonephricduct...develop into uterine
tubeCaudal vertical part that
fuses with its partner fromthe opposite side...fuse toform uterine canal
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Embryology of the Female Genital Tract
• A recent study using both chicken and mouseembryos has shown that these initially paired tubular
structures derive from the coelomic epithelium.
• Müllerian ducts have three elements:
1) a canalized epithelial tube2) mesenchymal cells surrounding the tube
3) coelomic epithelial cells.
http://embryology.med.unsw.edu.au/notes/genitalxxuterus.htm#Movies
Guioli S, Sekido R, Lovell-Badge R. The origin of the Müllerian duct in chick and mouse. Dev Biol. 2006 Oct 3
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Vagina Development
• The vagina arising by downward growth of Wolffian and
Müllerian ducts.
• The sinovaginal bulbs are the caudal ends of the
Wolffian ducts.• Vaginal development is also under negative control of
androgens.
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Development of the peritoneum
• The peritoneum develops ultimately from the mesoderm
of the trilaminar embryo.
• As an embryo develops, the various abdominal organs
grow into the abdominal cavity from structures in the
abdominal wall.
• In this process they become enveloped in a layer of
peritoneum.
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Peritoneum
• Parietal peritoneum:
• lines the inner surfaces of the walls of the abdominopelvic cavity
peritoneum.
• has same a/v/n/lymphatics, as the region of wall that it covers
• is sensitive to pressure, pain, heat+ cold+ laceration.
• Visceral peritoneum:
• lies on the surfaces of the abdominal and pelvic organs.
• covers visceral organs like the stomach and intestines.
• has same a/v/n/lymphatics, as the organ it covers.• stimulated primarily by stretching and chemical irritation.
• http://anatomy.uams.edu/anatomyhtml/peritoneum.html
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ENDOMETRIUM
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Graph illustrating the Noyes method of endometrial dating, which highlights the uncertainty
in timing introduced during the post-ovulatory period, the mid-luteal phase and by measuring
the LH surge.
Diedrich K et al. Hum. Reprod. Update 2007;13:365-377
© The Author 2007. Published by Oxford University Press on behalf of the European Society of
Human Reproduction and Embryology. All rights reserved. For Permissions, please email:
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The roles of progesterone and estrogen (E2; E3, estriol) and estrogen receptors (ER) during
endometrial development.
Diedrich K et al. Hum. Reprod. Update 2007;13:365-377
© The Author 2007. Published by Oxford University Press on behalf of the European Society of
Human Reproduction and Embryology. All rights reserved. For Permissions, please email:
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Factors regulated during the early stages of implantation.
Diedrich K et al. Hum. Reprod. Update 2007;13:365-377
© The Author 2007. Published by Oxford University Press on behalf of the European Society of
Human Reproduction and Embryology. All rights reserved. For Permissions, please email: [email protected]
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GENETICS, HORMONAL, AND
IMMUNOLOGICAL ASPECTS
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Genetics of endometriosis
• First degree relatives of patients with endometriosis have a 6.9%
incidence of endometriosis in comparison with a 1% risk in controls.
• Susceptibility to endometriosis has focused mainly on genes involved
in inflammation, steroid hormone regulation, metabolism,
biosynthesis, detoxification, vascular function and tissue remodelling.
• Specific miRNAs have a function in the pathophysiology of
endometriosis.• Contemporary genetic technologies and female reproduction. The Evian Annual
Reproduction (EVAR) Workshop Group 2010. Hum. Reprod. Update (November-
December 2011) 17 (6): 829-847. doi: 10.1093/humupd/dmr033
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Attar E and S.E. Bulun, Hum Reprod Update.2005; 0: 341
Aromatase Inhibitors: complete inhibition in estrogen synthesis
15S
e pt e
mb
e r
2 0 1 2
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Endometriosis: immunologic abnormality
Systemic
• Increased immunoglobulin production
• Increased in T-helper (CD4 ) cells
• Lymphocyte-mediated cytotoxicity deficiency to the
endometrium
• Embryotoxic serum
• Suppressing serum to the NK cell activity
• Cellular immunity deficiency
• Defect in NK cell activity
• Abnormal autoimmune function
• Decrease in suppressor cell activity
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FETAL ENDOMERIOSIS
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Müllerianosis and Fetal Endometriosis
• Sampson's classification of heterotopic or misplaced
endometrial tissue is based on pathogenesis:
1. direct invasion or primary endometriosis [adenomyosis];
2. a similar condition occurs in the wall of the tube from its invasion
by the tubal mucosa [endosalpingiosis];3. peritoneal or implantation endometriosis;
4. transplantation endometriosis;
5. metastatic endometriosis;
6. developmentally misplaced endometrial tissue [Müllerianosis]
(Sampson, 1925).
• Batt RE, Smith RA, Buck Louis GM, Martin DC, Chapron C, Koninckx
PR, Yeh J. Müllerianosis. Histol Histopathol. 2007 Oct;22(10):1161-6.
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Müllerianosis and Fetal Endometriosis
• Müllerianosis may be defined as an organoid structure of
embryonic origin.
• A choristoma composed of Müllerian rests – (normal
endometrium, normal endosalpinx, and normal
endocervix) - singly or in combination, incorporated withinother normal organs during organogenesis.
• A choristoma is a mass of histologically normal tissue that
is "not normally found in the organ or structure in which it
is located” (Choristoma, 2006).
• Batt RE, Smith RA, Buck Louis GM, Martin DC, Chapron C, Koninckx PR, Yeh J.
Müllerianosis. Histol Histopathol. 2007 Oct;22(10):1161-6.
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Müllerianosis and Fetal Endometriosis
• Müllerian choristomas are a subset of non-Müllerian
choristomas found throughout the body.
• Histologically, endometrial-Müllerianosis and
endometriosis are both composed of endometrial glands
and stroma, but there the similarity ends. Their
pathogenesis is different.
• Batt RE, Smith RA, Buck Louis GM, Martin DC, Chapron C,Koninckx PR, Yeh J. Mülleriano sis . Histol Histopathol. 2007
Oct;22(10):1161-6.
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Müllerianosis and Fetal Endometriosis
• Researchers remain unsure as to the definitive cause of
endometriosis.
• Theory of Müllerianosis for endometriosis, that is the
misplacing of primitive endometrial tissue along the
migratory pathway of fetal organogenesis.• Signorile PG, Baldi F, Bussani R, D'Armiento M, De Falco M, Baldi A.
Ectopic endometrium in human fetuses is a common event and sustains
the theory of müllerianosis in the pathogenesis of endometriosis, a
disease that predisposes to cancer. J Exp Clin Cancer Res. 2009 Apr
9;28:49
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Müllerianosis and Fetal Endometriosis
• Autopsy 36 human female fetuses at different gestational age.• Morphological and immunohistochemical study (expression of estrogen
receptor and CA125) on the pelvic organs of the 36 fetuses included en-blockand totally analyzed.
• In 4 out of 36 fetuses we found presence of misplaced endometrium in fivedifferent ectopic sites, in the:
• recto-vaginal septum,• proximity of the Douglas pouch,
• mesenchimal tissue close to the posterior wall of the uterus,
• rectal tube at the level of muscularis propria, and
• wall of the uterus. All these sites are common location of endometriosis in women.
• A cause of endometriosis is proposed as the dislocation of primitive
endometrial tissue outside the uterine cavity during organogenesis.• Signorile PG, Baldi F, Bussani R, D'Armiento M, De Falco M, Baldi A. Ectopic
endometrium in human fetuses is a common event and sustains the theory ofmüllerianosis in the pathogenesis of endometriosis, a disease that predisposesto cancer. J Exp Clin Cancer Res. 2009 Apr 9;28:49
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COELOMIC METAPLASIA AND
ADHESION MOLECULES
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Rokitansky Endometriosis = Coelomic
Metaplasia• Retrograde menstruation required the existence of a uterine
structure and endometrial tissue.
• A 20-year-old with Mayer-Rokitansky-Küster-Hauser syndromepresented with increasing pelvic pain and underwentlaparoscopy.
• Uterine, cervical, vaginal, and tubal agenesis was confirmed.• Stage I endometriosis was visualized in the posterior cul-de-sac anddestroyed.
• She received medical therapy for 5 years until she represented withpain and underwent another laparoscopy, at which endometriosis wasagain identified and destroyed.
• This case of endometriosis in a patient with complete uterineagenesis supports the theory of coelomic metaplasia.• Mok-Lin EY, Wolfberg A, Hollinquist H, Laufer MR. Endometriosis in a
Patient with Mayer-Rokitansky-Küster-Hauser Syndrome and CompleteUterine Agenesis: Evidence to Support the Theory of Coelomic Metaplasia.J Ped Adolescent Gynecol. 2010;23 (1 ): e35-e37
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Adhesion Molecules in Endometriosis
• A dynamic relationship between the endometrium and
peritoneum because both tissues may participate in the
spontaneous development of endometriosis.
• Various adhesion molecules, pro-inflammatory cytokines
and chemoattractants cytokines have emerged as centralcoordinators of endometrial-peritoneal interactions.
• Kyama CM, Mihalyi A, Simsa P, Falconer H, Fulop V, Mwenda JM,
Peeraer K, Tomassetti C, Meuleman C, D'Hooghe TM. Role of cytokinesin the endometrial-peritoneal cross-talk and development of
endometriosis. Front Biosci (Elite Ed). 2009 Jun 1;1:444-54.
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Adhesion Molecules in Endometriosis
• Menstrual endometrium has the ability to bond and invadethe peritoneal tissue.
• In baboons intrapelvic injection of menstrual endometrium
permits the study of early endometrial-peritoneal
interaction in an in vivo culture microenvironment and canlead to important insight in the early development of
endometriotic lesions.
• Kyama CM, Mihalyi A, Simsa P, Falconer H, Fulop V, Mwenda JM,
Peeraer K, Tomassetti C, Meuleman C, D'Hooghe TM. Role ofcytokines in the endometrial-peritoneal cross-talk and development
of endometriosis. Front Biosci (Elite Ed). 2009 Jun 1;1:444-54.
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Integrins in the Pathogenesis of
Endometriosis• Cell surface receptors with glycoprotein structure.
• Have part in process of adhesion of the endometrial cells
to the proteins from extra-cellular matrix (ECM) outside
the uterus.
• Have part like signal molecules in the processes ofproliferation and invasion of endometrial implants.
• Very essential molecules influencing the viability of
endometrial implants as well as the angiogenesis in the
new forming endometrial implants.
• Zasheva D, Dimitrov R, Stamenova M. Endometriosis and the role of the
integrins in the pathogenesis of the endometriosis. Akush Ginekol (Sofiia).
2007;46(5):37-48.
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Matrix Metalloproteinase in Endometriosis
• Participate in the histologic changes of the endometriumduring the menstrual cycle
• Higher expression during the menstrual and proliferative
phase of the endometrium
• Decreased expression during the secretory phase.
• Degradation of extracellular matrix is essential for the
endometrial cells to invade the peritoneum and to develop
an endometriotic lesion as well.
• Pitsos M, Kanakas N. The role of matrix metalloproteinases in the
pathogenesis of endometriosis. Reprod Sci. 2009 Aug;16(8):717-26.
Epub 2009 Apr 7.
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MALIGNANT POTENCY OFENDOMETRIOSIS
Cli i th l i l i il iti f
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Clinicopathological similarities of
endometriosis and cancer• (i) endometriotic implants may directly undergo malignant
transformation, perhaps through an atypical
endometriosis transition phase;
• (ii) both endometriosis and cancer share common
antecedent mechanisms and/or predisposing factors (e.g.genetic susceptibility, immune/ angiogenic dysregulation,
environmental toxin exposure), with obvious divergence in
molecular pathways downstream.
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Malignant Potencies of Endometriosis:
Histopathology
• Endometriosis displays features of:• Atypia,
• Adherence,
• Invasion and
• Metastases.
• Atypical endometriosis:
• endometrial glands with cytological or architectural atypia
• (LaGrenade & Silverberg 1988),
• observed in 12 –35% of ovarian endometriosis
• (Seidman 1996, Nishida et al. 2000, Bayramoglu & Duzcan 2001).
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Malignant Potencies of Endometriosis:
Histopathology
• 60 –80% of cases of endometriosis-associated ovariancancer (EAOC) occur in the presence of atypical ovarian
endometriosis.• (Fukunaga et al. 1997, Ogawa et al. 2000, Oral et al. 2003).
• 25% show direct continuity of the atypical ovarianendometriosis with ovarian cancer.
• (Fukunaga et al. 1997)
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Malignant Potencies of Endometriosis: Ovarian malignancy may
arise directly from ovarian endometriosis
• Around 60% of EAOCs (endometriosis-associated ovariancancer) occur with the cancer adjacent to endometriosis
or arising directly from ovarian endometriosis, with the
remaining 40% occurring with distant endometriotic
disease• (Erzen & Kovacic 1998, Modesitt et al. 2002).
• Clear-cell and endometrioid carcinomas are the
commonest EAOCs with ovarian endometriosis, whileclear-cell adenocarcinoma and adenosarcoma are the
commonest EAOCs in extra-ovarian endometriosis• (Erzen & Kovacic 1998, Stern et al. 2001, Zaino et al. 2001).
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CLINICAL PRESENTATIOSOF ENDOMETRIOSIS
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3 Clinical Forms of Pelvic Endometriosis
• 1) peritoneal endometriosis,• 2) ovarian endometriosis,
• 3) rectovaginal septum endometriosis.
• These three entities are distinct and have a differenthistopathogenesis (Nisolle, 1996).
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Endometriosis manifestation [1]
Vesicle
Spider nevi
Ecchymosis
Light brown
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Yellowish brown
Red vesicle
Dark red
Laser-cystectomy
Endometriosis manifestation [1]
Th t f d t i l d t i i
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Three types of deep rectovaginal endometriosis
(Adamyan classification, 1993)
1) Retrocervical endometriosis (in which the rectum isusually free of disease)
2) Rectovaginal septum
3) Bowel endometriosis (with infiltrative characteristics
over the bowel thickness)• This type of classification may be more compatible with the
surgical approach of this disease
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Types of deep retrocervical endometriosis
(Adamyan and Martin classification, 2001)
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Types of deep retrocervical endometriosis
(Adamyan and Martin classification, 2001)
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Types of deep rectovaginal endometriosis
(Adamyan classification, 1993)
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Types of deep rectovaginal endometriosis
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Types of deep rectovaginal endometriosis
(Adamyan and Martin classification, 2001)
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Basics of treatment for Pelvic
Endometriosis: Basic Science and Clinical Application 86
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Basics of treatment for Pelvic
endometriosis:
• All foci have to be eliminated: destruction of
tissue, cytoreduction (‘benign cancer’), elimination
of antigen.
• There is no single method of treatment for all type
of endometriosis: medical (hormonal) and surgical
intervention are always necessary.
• Operative laparoscopy is the current choice:clean, less traumatic, prompt recovery.
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Classic Medical Treatments of Endometriosis
Intracrine and Rational Treatment of
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Intracrine and Rational Treatment of
Endometriosis
A = Androgen Arom = aromataseE1 = Estron E2 = EstradiolGnRHa= GnRH agonist
Th ti l di l t t t
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The optimal medical treatment No menopausal symptoms
No proliferation
Menopausal
SymptomsProliferation of implants
Estradiol level
pg/ml
TherapeuticWindow
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Lunenfeld on Endometriosis
• “........back in 1958, I wasn‟t working on implantation onlyto prevent pregnancies; I also wanted to study
implantation because I wanted to prevent metastasis
implanting anywhere in the body”
• Six years later in Chicago when he met Professor Melvyn Cohen, whowas doing the first laparoscopies and showed him endometriotic tissue
in the pelvis, Lunenfeld commented:
• “Listen! This is a very interesting thing, maybe we should
work on implantation and then we could probably prevent
implantation of endometriosis wherever it comes from?”
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Lunenfeld on Endometriosis
• I am sure that working on factors which can controlangiogenesis and factors which can prevent implantation
have a future.
• We are learning to control pain through certain
progestogen agents and GnRH analogues, … but for thetime being the only thing that we really have, and which
really works, is surgical removal of the disease.
• Through laparoscopy you can diagnose and treat at the
same time, removing lesions as good as you can.• But it is still surgery and I only hope in the very near future
endometriosis can be treated medically”.
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FUTURE TREATMENT OFENDOMETRIOSIS
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Stem Cells in Endometriosis
• Adult stem cells have been identified in several tissues,including the endometrium.
• These cells are probably involved in the regenerative
ability of the endometrial cycle, and also in the
pathogenesis of proliferative gynecological diseases, suchas endometriosis.
• Flávia R. Oliveira, Cynthia Dela Cruz, Helen L. Del Puerto, Quésia
T.M.F. Vilamil, Fernando M. Reis and Aroldo F. Camargos. Stem cells:
Are they the answer to the puzzling etiology of endometriosis? Histol
Histopathol 27, 23-29 (2012)
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Stem cells in Endometriosis: a new perspective
• Human endometrium can be reconstructed inimmunodeficient mice upon injection with human
endometrial SP cells• (Cervelló et al., 2010).
• The retrograde menstruation of SP cells and subsequent
implantation onto the surface of ectopic sites are
responsible for the establishment of endometriotic lesions• (Sasson and Taylor, 2008; Masuda et al., 2010).
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Stem cells in Endometriosis: a new perspective
• An initial genetic mutation may cause aberrant behavior ofa subpopulation of endometrial stem cells;
• Clonal expansion of such cells may then occur and result
in development of endometriosis.
• Peritoneal cells could undergo de-differentiation back toendometrial cells, which take on an altered activity.
• (Gargett et al ., 2009).
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Summary
• Endometriosis is an enigmatic disease.• It can emerge at the earliest time in the fetal life.
• The knowledge of human implantation and
embryogenesis is a coined and basic science to
understand the pathogenesis of endometriosis.
• Stem cell is expected to be the future therapy of
endometriosis.
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T . Z .
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THANK YOU
©T.Z. Jacoeb15 September 2012