This document discusses the definition, clinical presentation, diagnosis, and management of endometriomas. Key points include: - Endometriomas are ovarian cysts caused by the growth of endometrial tissue in the ovary. - They commonly present with pelvic pain and can affect fertility. Diagnosis is usually made by ultrasound or MRI showing characteristic cyst features. - Treatment involves medical management with hormones or surgery. Conservative cyst removal by laparoscopy is preferred for fertility preservation, while drainage may be used for high-risk cases. - Both medical and surgical treatments aim to relieve symptoms, but neither has proven clearly superior for long-term outcomes. Treatment should be individualized based on patient factors and

1. Evidence Based Management of
Endometrioma
Salah Roshdy Ahmed
Professor of Obstetrics & Gynecology
Sohag University

2. Definition
• Endometrioma (“chocolate cyst”):
is best defined as blood-containing
pseudo-cyst arising from growth of
ectopic endometrial tissue, which
progressively invaginates the ovarian
cortex.

3. Definition
• Characteristically adherent to surrounding
structures, such as the peritoneum, fallopian
tubes, and bowel.
• – Definitive diagnosis based on histopathology
(endometrial tissue and hemosiderin laden
macrophages)
• – US/imaging evidence is supportive

4. 4
This is a section through an enlarged 12 cm ovary to
demonstrate a cystic cavity filled with old blood
typical for endometriosis with formation of an
endometriotic, or "chocolate", cyst.

5. Ovarian Endometriosis
(Endometrioma)
• Formed by invagination of the
ovarian cortex after accumulation
of menstrual debris from bleeding
of endometriotic implants.

6. 6

7. Pathology
• Peritoneal inflammation and fibrosis
• Adhesions
• Ovarian cysts
• Deep nodules

9. Typical Clinical Presentation of
Endometrioma
Chronic or acute pelvic pain
• Dysmenorrhea
• Dyspareunia
• Infertility
• Dyschezia / bowel symptoms / rectal bleeding
• Urinary symptoms / haematuria
• Diagnosed in patients with or without h/o diagnosed
endometriosis. N.B. Endometrioma is the most
common manifestation of endometriosis and the
longest lasting.

10. Associations
• Menorrhagia (adenomyosis)
• IBS
• PID
• Chronic pain syndromes
• Depression

11. Mechanisms of pain
• Inflammatory cytokines in the peritoneal
cavity
• Focal bleeding from implants
• Irritation and direct infiltration of nerves
• Hormonal modulation: pain threshold

12. Endometrioma & Infertility
• The pathogenesis of infertility in women with
endometriosis has not been clearly
understood except in cases of distorted pelvic
anatomy.
• Even in women undergoing IVF, pregnancy
rates were found to be lower in patients with
endometriosis compared with those with
tubal factor infertility.

13. • The effect of endometrioma per se on fertility
has not been adequately investigated as it is
rare to find isolated endometrioma without
surrounding peritoneal disease.

14. • It may be speculated that the inflammatory
reaction typically associated with the presence of
endometriosis may play a role.
• Alternatively, the expanding ovarian cyst may
cause pressure atrophy of the ovarian tissue or
affect the normal vascularization of the ovary.
• Nakahara et al. (1998) found a higher incidence
of apoptotic bodies in the ovarian membrane
granulosa of patients with endometriosis than
that of a control.

15. • Currently, there is insufficient data to clarify
whether the endometrioma-related damage
to ovarian reserve precedes or follows surgery.
• It has been shown that ovaries with
endometriotic cysts already exhibited reduced
number of follicles and vascular activity
compared with other types of benign cysts.

16. Postulation
• Impaired folliculogenesis.
• Toxic effect of cytokines on oocyte or embryo
quality .
• Disordered fertilization and embryo
implantation.
• Distorted adnexal anatomy
• Ovarian cysts.

17. Transvaginal Ultrasound:
• Low level internal echoes
• Thick walled
• Homogeneous “ground glass” appearance
• Unilocular or Multilocular
• Often solid appearing or cystic
• Can show varying degrees echogenicity (even
anechoic) in locules with fluid levels
• Can show punctate echogenic foci (wall or central
calcification) with distal shadowing
• Round Shape
Regular Margins

19. Ultrasound of Endometrioma

20. Doppler Ultrasound:
• Gives information about the blood flow and
resistance to flow present in a lesion.
• Lower resistive indices (RI) are concerning for
malignancy.
• Generally, it is reassuring when
endometriomas show no internal vascularity .

21. This Doppler shows a lack
of blood flow centrally in
the lesion. This is
reassuring

22. C T
• Not typically used b/c findings are nonspecific
• Endometriomas appear as cystic masses
• Can show high attenuation lesion with
dependent fluid
• Good for complications of endometrioma like
bowel and ureteral obstruction

24. MRI
• Cystic mass with very high signal intensity on
T1 and very low signal intensity on T2
• T2 images shows shading that can occur in a
graded shadowing pattern
• Shadowing pattern results from blood
degradation products (protein and iron)
• Again, complications seen well

25. MR of Endometrioma

26. Laparoscopy

27. “KISSING OVARIES”

28. Management
Endometriomas are managed in the same
manner as endometriosis.
• Initial management is OCPs with NSAIDS
for pain as needed.
• More refractory disease merits other
hormonal treatments such as GnRH,
Progestins,Aromatase Inhibitors, or
Danazol.

29. Surgical Treatment
• Ultrasound-guided aspiration
• Surgical treatment
Treatment by laparoscopy:
a) Conservative treatment:
• Laparoscopic aspiration
• Cystectomy:
• Drainage and destruction (laser or bipolar
coagulation) of the inner lining
• Three-stage management

30. Surgical Treatment
b) Radical treatment:
• Ovariectomy
• Adnexectomy
• Treatment by laparotomy

31. Management of endometrioma prior
to IVF
• There is insufficient evidence to support
routine surgical treatment of endometrioma
in asymptomatic subfertile women.
• ESHRE guidelines, recommend expectant
management if endometrioma is smaller than
4 cm and in cases of recurrent endometrioma.

32. Management of endometrioma prior
to IVF
• The European Society of Human Reproduction
and Embryology (ESHRE)
recommend laparoscopic ovarian cystectomy if
the endometrioma is 4 cm in diameter in order
1. to confirm the diagnosis histologically,
2. to reduce the risk of infection,
3. to improve access to follicles and possibly
4. to improve ovarian response.

33. • A potential deleterious effect of surgery is the
accidental removal or damage of normal ovarian
tissue.
• Stripping the endometriotic cyst wall is technically
more difficult than non-endometriotic ovarian cysts,
resulting in the inevitable removal of normal ovarian
tissue.
• Drainage and coagulation of the cyst wall carries a risk
of damage to the ovarian cortex.
• Both surgical techniques have been associated with
reduced ovarian reserve and premature ovarian failure

34. • Women who opt for surgical treatment of
endometrioma prior to IVF should be offered
ovarian reserve tests before surgery and those
with reduced ovarian reserve should be
discouraged from undergoing surgical
treatment.
• Women undergoing ovarian surgery should
be warned about the possible risk of surgery
on ovarian function.

35. Management of endometrioma in
women with pelvic pain
• The relationship between chronic pelvic
pain symptoms and endometrioma is not
very clear.
• In studies using multivariate analysis,
neither the presence of endometriomas
nor any of their characteristics appears to
correlate with painful symptômes .

36. Management of endometrioma in
women with pelvic pain
• In the majority of cases, it is not possible
to relate the woman’s symptoms to
endometrioma per se but to the
periovarian adhesions or deeply
infiltrating endometriosis, which should
be treated simultaneously.

37. Medical ttt
• Medical treatment is generally effective
in relieving the endometriosis related
pain.
• Hormonal (COC), danazol, gestrinone,
medroxyprogesterone acetate and GnRH
agonist – have been found to be equally
effective but the side-effect profiles vary .

38. Medical ttt
• The painful symptoms usually recur after
discontinuation of medical treatment .
• Several studies showed reduction in the
size of small endometriomas after
ovarian suppression with danazol or
GnRH agonist but large endometriomas
are not going to be completely resolved.

39. Surgical ttt
• Surgical treatment of endometrioma is widely accepted
as the first line management of symptomatic
endometriomas, particularly for women who have
completed their family.
• Surgical treatment include
1. drainage with or without sclerotherapy,
2. drainage with diathermy or laser vaporization of the
cyst wall,
3. drainage and stripping of the cyst wall (ovarian
cystectomy) and
4. radical treatment in the form of hysterectomy with or
without oophorectomy

40. Surgical ttt
• There is a significant risk of visceral injury
as endometriomas are usually associated
with severe peritoneal endometriosis
and multifocal disease .
• Nevertheless, large endometriomas may
be more susceptible to infection or
rupture and should ideally be treated
surgically.

41. Surgical ttt
• Surgical treatment of endometrioma can be
performed via laparotomy or laparoscopy,
with no significant differences in the risk of
recurrence of the cyst or pelvic pain
symptoms and fertility outcome .
• It is recognized that laparotomy might be
indicated in selected cases of severe
endometriosis associated with dense
extensive adhesions particularly in women
who have had previous surgery.

42. Surgical ttt
• Laparoscopic or transvaginal ultrasound
guided drainage of endometrioma is
associated with a high and rapid
recurrence rate and is rarely effective in
alleviating the patient’s symptoms.
• It can be associated with a higher risk of
pelvic infection and pelvic adhesions.

43. Summary
• Medical treatment should be offered to
symptomatic women with small
endometrioma who wish to avoid
surgery.
• Conservative surgical treatment is
generally preferred for premenopausal
women who wish to preserve their
ovarian function.

44. Summary
• Excision of endometrioma offers
advantage over drainage and ablation
with respect to the recurrence of
endometrioma and pelvic pain.
• Radical treatment is best reserved for
older women who have completed their
family.

45. Conclusions
• Endometriomas are commonly seen in
women of reproductive age who may
wish to preserve their ovarian function
and/or fertility.
• There is insufficient evidence to suggest
that surgical treatment of endometrioma
is better than medical treatment with
respect to the long-term relief of
symptoms and quality of life.

46. Conclusions
• Treatment of symptomatic women
should be individualized according to
• the woman’s age and her desire for
fertility,
• previous surgery,
• long-term effects of medical therapy and
• the patient’s preference.

47. Conclusions
• Drainage and sclerotherapy of
endometrioma, possibly followed by
postoperative ovarian suppression
for 3 months, may be valid for
women with a history of previous
multiple surgery or those with frozen
pelvis who wish to preserve their
ovaries.

48. Conclusions
• Laparoscopic excision of ovarian
endometrioma prior to IVF does not
offer any additional benefit over
expectant management in terms of
ovarian response to gonadotrophin
stimulation or pregnancy outcome.

49. Conclusions
• Surgical treatment can be
justified for women with
concomitant pelvic pain not
responding to medical treatment,
when the cyst is larger than 4 cm
or when malignancy cannot be
reliably excluded.