management of myoma in infertile patients 연세대학교 의과대학 영동세브란스 병원...
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Management of Myoma In Infertile Patients
연세대학교 의과대학 영동세브란스 병원
산부인과 이 병 석
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Leiomyoma, Fibroid of Uterus
• Most common benign tumor of the reproductive tract
• 20-40% of women during the reproductive years
• More than 70% of hysterectomies
• Myoma account for 2% to 3% of infertility
• Exact pathophysiologic mechanism is not known
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Biology of Myoma
• The effect of gonadal steroid hormones
• Genetic abnomalities
• Growth factor abnormalities
• Increased amount of extracellular matrix
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Myometrial smooth cell
somatic mutationEstrogen,Progesterone
IGF-I, II, EGF, bFGF HBGF, TGF-
Fibroidgrowth
Fibroid
ECMCell proliferation
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Uterine Myoma
Infertility
?• Buttram et al ( Fertil & Steril, 1981), Verkauf et al ( Fertil & Steril, 1992) :40-45% of Infertile couples conceive after myomectomy• Buttram et al ( Fertil & Steril, 1981) :Recurrent pregnancy loss rates are reduced from 40% to 20% after myomectomy
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Uterine myoma and ART
• Stovall et al (1998): Reduce the efficacy of ART
• Ashkenazi et al (1995): Implantation rate and pregnancy rate are impaired only when the deformation of the uterine cavity is present
• Ramzy et al (1998): Myoma without encroaching on the cavity and <7cm in diameter do not affect the implantation rate or miscarriage rates in IVF or ICSI
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Pregnancy Delivery
60
50
40
30
20
10
0
Rat
e p
er o
ocyt
e re
trie
val (
%)
Pregnancy and delivery rates of cases (white bars) and controls (filled bars).
(Stovall et al, 1998)
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Pregnancy outcome of Assisted Reproduction
Total pregnancies Clinical Implantation per Abortions Deliveries
Pregnancies embryo (% total cases)
Group I (39 cycles) 18 (45.0%) 15 (38.5%) 16/128 (12.5%) 3 (20.0%) 9 (23.1%)
Group II (367 cycles) 154 (42.0%) 123 (33.5%) 165/1192 (13.8%) 19 (15.5%) 95 (25.9%)
Total (406 cycles) 172 (42.4%) 138 (34.0%) 181/1320 (13.7%) 22 (15.9%) 105 (25.9%)
(Ramzy et al, 1998)Group I: not encroaching on the cavity and <7cm in DGroup II: controls
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Hypothetic Mechanism Causing Infertility
Submucosal Myoma• Disarray of the straight and radial arteries endometrial vascular support may be compromised• Inflammation and Ulceration biochemical alteration in the uterine fluid
Intramural Myoma• Distortion and elongation of endometrial cavity impede sperm transport• Impairment of the neuromuscular mechanism that control the uterotubal junction The cornua can be obstructed
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Intraligamentary Myoma
• Distort the normal course of the F-tube and alter the anatomic relationship between the distal portion of the tube and the ovary prevent the extruded ovum from entering the oviduct
Cervical Myoma
• The position of the cervix can be displaced thus potentially interfering with sperm pick-up from the seminal pool in the posterior fornix following coitus
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Patient group Patient group
35
30
25
20
15
10
5
0
Pre
gnan
cy o
r im
pla
nta
tion
rat
e (%
)
Pregnancy and implantation rates in the groups of patients without fibroids (controls) and with subserosal fibroids (SS), intramural fibroids (IM), and submucosal (SM). *P<0.05 for IM versus controls or SS. **P<0.005 for IM versus control.
controls
controls SS
SS
IM
IM
SM
SM
Pregnancy rate Implantation rate
*
**
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Surgical Treatment Abdominal, Laparoscopic, Hysteroscopic Myomectomy• Uterine Artery Embolization• Myolysis Laser, Bipolar needle, Diathermy, Cryomyolysis Myoma interstitial thermo-therapy
• Medical treatment GnRH analogue, Antiprogestins(RU486)
Current Current Therapy of Uterine Myoma
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Abdominal Myomectomy
• Traditionally is performed when infertility enhancement or uterine preservation is desired• Adequate exposure and removal of larege myomas with favorable reconstruction of the uterine wall
• general report up to 50% postop preg rate• 10-45% recurrence rate
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Pregnancy in Patients Attempting Conception After Myomectomy
Myoma alone Length offollow-up with exposure in alYear Author No. Pregnancy Live birth patients
% mo1983 Berkeley et al. 1/6 16.7 16.7 59 (17 to 127 )*
1984 Garcia and 8/13 61.5 46.2+ At least 10 Tureck
1986 Rosenfeld 15/23 65.2 56.5 At least 121987 Reyniak and 7/10 70.0 NS NS (8 to 26)s
Corenthal1988 Stark 14/24 58.3 NS 20 (12 to 36)1990 Smith and NS
Uhlir1991 Verkauf and 2/3 66.7 42 42 (4 to 112)
Bernhisel (unpublished data)
Total 47/79 59.5
+ One termination of pregnancy; one spontaneous abortion followed by subsequent conception in late second trimester doing well* Values are averages or medians with ranges in parentheses. S NS, not stated.
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Impact of Additional Factors Potentially Affecting Conception Rates
Distorted Weight/no. uterine No. of of myomata No. of cavity fibroids or size of uterine Duration ofAuthor preop removed uterus incisions Age infertility
Berkeley et al (1983) NS+ + + NS + NSGarcia and Tureck (984) - NS NS NS NS NSRosenfeld (1986) - - - NS - +Reyniak and - NS NS NS NS NS Corenthal (1987)Stark (1988) NS NS NS NS + +Smith and Uhlir (1990) NS NS - NS - NSVerkauf and Bernhisel - - - - - + (unpublished data)
+ NS, not stated
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Laparoscopic Myomectomy
• Difficult procedure that requires advanced surgical skill The quality of uterine repair is important thing during the procedure • The number, size and location of the tumors limit the use• There is no available data No definitive criteria have been established
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Contraindication
Daniel et al (J Gynecol Surg, 1991) > 4 large myomas (>4cm in diameter) > 10cm in diameter
Durai et al (Contracept Fertil Sex, 1996) > 4 myomas > 7 cm size
Careful patient selection can decrease thecomplication and conversion to laparotomy
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Myomectomy
Laparotomy Laparoscopy
Outcomes were different depending on Surgen’s skill, available equipment and charicteristics of myoma there is no adequate randomized controlled trial
66.2% (Rosenfeld et al, 1986)66.7% (Verukaf, et al, 1992)
65.35% (Ribeiro et al, 1999)33.3% (Dubisson et al, 1996)
Preg rate
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Submucosal Myoma
• The incidence has been reported as 7.8% -29% in myomas • Infertility directly related to uterine factors may be 10-15% of the etiologic factors
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Treatment of Submucosal Myoma
• Nd:YAG laser
• Resectoscopy
• Hysteroscopic Scissors
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Intramural Extension
Type 0
Type I
Type II
(Wamsteker et al, 1993)
• Endoresection may be effective for type 0, I.• Resection of type II should be considered in selected cases because of requirement of repeat procedures and high chance of failure rates
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PREGNANCY AFTER RESECTOSCOPIC MYOMECTOMY
Pregnancy
Authors No. Pts No. Pts (%) Outcome
Hallez et al. 11 7 (67) Term : 5 Pts (1987)Brooks et al. 15 5 (33) Term (1990)Loffer (1991) 12 7 (58) Term
Corson & 10 (77) Term : 8 Pts Brooks (1991) 13
YDSH (1999) 27 16 (65) Term : 14 Pts
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Uterine Artery Embolization (UAE)
Stancato-Pasik et al,(1997) 12 patients with postpartum hemorrhage 11:normal menses 3: pregnant term delivery
Postpartum embolization therapy may not beanalogous to embolization for uterine myoma(endometrial vascular supply may be compromised even before embolization)
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UAE for myoma has a direct effect on endometrial maturation, histology or perfusion ?
• Blood flow is always lower in myoma than myometrium: Uterine myoma could decrease blood supply to the developing placenta and cause implantation failure (Rock JA, 1983)• Ovarian function may be compromised after UAE : reduce fertility• It is estimated that 1-2% of women may experience ovarian failure after UAE
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Pregnancy outcome after uterine artery embolization (UAE)
Investigator, date No. of UAE No. of No. of(reference) subjects Pregnancies deliveries Comments
Forman (1999) 1,000 14 ? Survey of multiple centersRavina (2000) 184 12 7 9 women 5 first-trimester losses 7 births: 3 preterm, 4 termNicholson (1999) 24 1 1 Regrowth of fibroid during
pregnancy, term cesarean sectionPron (1999) 77 1 ? Regrowth of fibroid during pregnancyHutchins (1999) 305 2 1 1 term delivery; 1 case of IVF twins,
ongoing first trimesterBradley (1998) 8 1 ? First-trimester viability confirmedRavina (1997) 80 3 1 1 abortion at 6 months in AIDS patient 1 35-week operative delivery of twins 18-week abortionRavina (1995) 16 1 1 Premature delivery, AIDS patient Total 1,730 32 9
A no study describes the number of women attempting pregnancy or evaluates the cycle fecundity rate for those trying to conceive after UAE. Hurst. Uterine artery embolization for myomas. Fertil Steril 2000.
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Indications for ablative therapy for uterine leiomyomata :abdominal myomectomy versus uterine attire embolization.
Myo- Uterine arteryCondition mectomy embolization
Multiple symptomatic subserosal, intramural, + + and submucosal myomasRapidly enlarging myoma + 0Infertility + 0Desire to retain fertility + ?Does not desire future fertility but wishes ? + to retain uterusPoor surgical risk 0 +Hemodynamic instability because of hemorrhage 0 +Diffuse multiple uterine leiomyomas 0 +
Hurst. Uterine artery embolization for moymas. Fertil Steril 2000.
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Myolysis and Pregnancy
Chapman (1993), Phillips (1995) Favour of pregnancy after myolysis
Donnez (2000) contraindication in women desire pregnancy rupture during pregnancy adhesion due to inflammation
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Myometrial smooth cell
Myoma
Myoma Growth
Gene Therapy
Growth Factor Modulation
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Target Specific Clinical Symptoms
Basic FGF abnormalities: abnormal myoma related bleeding
TGF-beta abnormalities: excessive uterine size
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Conclusion
• Myomas represent an isolated potential contributory cause of infertility • In the absence of other factors to explain infertility in patients with myoma, myomectomy either performed endoscopically or abdominally, should be considered• In selecting the surgical approach, the operative morbidity and application of meticulous surgical technique must be considered• Treatment of myomas in infertility must be individualized carefully