UTERINE FIBROIDS Dr. SALWA NEYAZI CONSULTANT OBSTETRICIAN GYNECOLOGIST

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Presentation transcript:

UTERINE FIBROIDS Dr. SALWA NEYAZI CONSULTANT OBSTETRICIAN GYNECOLOGIST PEDIATRIC & ADOLESCENT GYNECOLOGIST

What is the incidence of leiomyomas? What is a leiomyoma? It is a benign neoplasm of the muscular wall of the uterus composed primarily of smooth muscle What is the incidence of leiomyomas? They are the most common pelvic tumors It is found in 25% of white women & 50% of black women

ETIOLOGY Unknown Each individual myoma is unicellular in origin Estogens no evidence that it is a causative factor , it has been implicated in growth of myomas Myomas contain estrogen receptors in higher concentration than surrounding myometrium Myomas may increase in size with estrogen therapy & in pregnancy & decrease after menopause They are not detectable before puberty Progestrone increase mitotic activity & reduce apoptosis  in size There may be genetic predisposition

PATHOLOGY Frequently multiple May reach 15 cm in size or larger Firm Spherical or irregularly lobulated Have a false capsule Can be easily enucleated from surrounding myometrium

CLASSIFICATION Submucous leiomyoma Pedunculated submucous Intramural or interstitial Subserous or subperitoneal Pedunculated abdominal Parasitic Intraligmentary Cervical

MICROSCOPIC STRUCTURE Whorled appearance nonstriated muscle fibers arranged in bundles running in different directions Individual cells are spindle shaped uniform Varying amount of connective tissue are interlaced between muscle fibers Pseudocapsule of areolar tissue & compressed myometrium Arteries are less dense than myometrium & do not have a regular pattern of distribution 1-2 major vesseles are found at the base or pedicle

SECONDARY CHANGES

1-BENIGN DEGENERATION Atrophic Hyaline  yellow, soft gelatinous areas Cystic liquefaction follows extreme hyalinization Calcific circulatory deprivation precipitation of ca carbonate & phosphate Septic circulatory deprivation necrosis  infection Myxomatous (fatty) uncommon, follows hyaline or cystic degenration

1-BENIGN DEGENRATION (cont’d) Red (carneous) degeneration Commonly occurs during pregnancy Edema & hypertrophy impede blood supply aseptic degenration & infarction with venous thrombosis & hemorrhage Painful but self-limiting May result in preterm labor & rarely DIC 2-MALIGNANT TRANSFORMATION Transformation to leiomyosarcomas occurs in 0.1-0.5%

CLINICAL FINDINGS

1-SYMPTOMS 1-Abnormal uterine bleeding Symptomatic in only 35-50% of Pt Symptoms depend on location, size, changes & pregnancy status 1-Abnormal uterine bleeding The most common 30% Heavy / prolonged bleeding (menorrhagia)  iron deficiency anemia

1-Abnormal uterine bleeding (cont’d) Submucous myoma produce the most pronounced symptoms of menorrhagia, pre & post-menstrual spotting Bleeding is due to interruption of blood supply to the endometrium, distortion & congestion of surrounding vessels or ulceration of the overlying endometrium Pedunculated submucous  areas of venouse thrombosis & necrosis on the surface intermenstrtual bleeding

2-PAIN Vascular occlusion  necrosis, infection Torsion of a pedunculated fibroid acute pain Myometrial contractions to expel the myoma Red degenration acute pain Heaviness fullness in the pelvic area Feeling a mass If the tumor gets impacted in the pelvis pressure on nerves back pain radiating to the lower extremities Dysparunea if it is protruding to vagina

3-PRESSURE EFFECTS If large may distort or obstruct other organs like ureters, bladder or rectum urinary symptoms, hydroureter, constipation, pelvic venous congestion & LL edema Rarely a posterior fundal tumor extreme retroflexion of the uterus distorting the bladder base urinary retention Parasitic tumor may cause bowel obstruction Cervical tumors serosanguineous vaginal discharge, bleeding, dyspareunia or infertility

5- SPONTANEOUS ABORTIONS 4-INFERTILITY The relationship is uncertain 27-40% of women with multiple fibroids are infertile  but other causes of infertility are present Endocavitary tumors affect fertility more 5- SPONTANEOUS ABORTIONS ~2X N  incidence before myomectomy 40% after myomectomy 20% More with intracavitary tumors

EXAMINTION LABORATORY FINDINGS Most myoma are discovered on routine bimanual pelvic exam or abdominal examination Retroflexed retroverted uterus  obscure the palpation of myomas LABORATORY FINDINGS Anemia Depletion of iron reserve Rarely erythrocytosis pressure on the ureters back pressure on the kidneys  erythropoietin Acute degeneration & infection  ESR, leucocytosis, & fever

IMAGING Pelvic U/S is very helpful in confirming the Dx & excluding pregnancy / Particularly in obese Pt Saline hysterosonography can identify submucous myoma that may be missed on U/S HSG  will show intrauterine leiomyoma MRI  highly accurate in delineating the size, location & no. of myomas , but not always necessary IVP  will show ureteral dilatation or deviation & urinary anomalies HYSTROSCOPY  for identification & removal of submucous myomas

DIFFERENTIAL DIAGNOSIS Usually easily diagnosed Exclude pregnancy Exclude other pelvic masses -Ovarian Ca -Tubo-ovarian abscess -Endometriosis -Adenexa, omentum or bowel adherent to the uterus Exclude other causes of uterine enlargement: -Adenomyosis -Myometrial hypertrophy -Congenital anomalies -Endometrial Ca

DIFFERENTIAL DIAGNOSIS Exclude other causes of abnormal bleeding Endometrial hyperplasia Endometrial or tubal Ca Uterine sarcoma Ovarian Ca Polyps Adenomyosis DUB Endometriosis Exogenouse estrogens Endometrial biopsy or D&C is essential in the evaluation of abnormal bleeding to exclude endometrial Ca

COMPLICATIONS

1-COMPLICATIONS IN PREGNANCY ≥ 2/3 of women with fibroids & unexplained infertility conceive after myomectomy Red degeneration In the 2nd or 3rd trimester of pregnancy rapid  in size  vascular deprivation  degeneration Causes pain & tenderness May initiate preterm labor Managed conservatively with bedrest & narcotics + tocolytics if indicated After the acute phase pregnancy will continue to term

COMPLICATIONS IN PREGNANCY DURING LABOR Uterine inertia Malpresentation Obstruction of the birth canal Cervical or isthmeic myoma  necessitate CS PPH

COMPLICATIONS IN NONPREGNANT WOMEN Heavy bleeding with anemia is the most common Urinary or bowel obstruction from large parasitic myoma is much less common Malignant transformation is rare Ureteral injury or ligation is a recognized complication of surgery for Cx myoma No evidence that COCP  the size of myomas Postmenopausal women on HRT must be followed up with pelvic exam or U/S every 6 M

TREATMENT

TREATMENT DEPENDS ON: Age Parity Pregnancy status Desire for future pregnancy General health Symptoms Size Location

A-EMERGENCY MEASURES Blood transfusion/ PRBC to correct anemia Emergrncy surgery indicatd for: - infected myoma -acute torsion -intestinal obstruction Myomectomy is contraindicated during pregnancy

B-SPECIFIC MEASURES Most cases asymptomatic  no treatment Postmenopausal  no treatment Other causes of pelvic mass must be excluded The Dx must be certain Initial follow up every 6 M  to determine the rate of growth of the myoma Surgery is contraindicated in pregnancy The only indication for myomectomy in pregnancy is torsion of a pedunculated fibroid Myomectomy is not recommended during CS Pregnant women with previous multiple myomectomy / especially if the cavity was entered  should be delivered by CS to  risk of scar rupture in labor

GNRH AGONISTS RX results in: 1- size of the myomas 50% maximum 2- This shrinkage is achieved in 3M of RX 3-Amenorrhea & hypoestrogenic side-effects occur 4-Osteopososis may occur if Rx last > 6M It is indicated for 1- bleeding from myoma except for the polypoid submucous type 2-Preoperative to  size  allow for vaginal hysterectomy myomectomy laparoscopic myomectomy

C-SUPPORTIVE MEASURES PAP smear & endometrial sampling for all Pt with irregular bleeding Before surgery -Correct Hb -Prophylactic antibiotics -Mechanical & antibiotic bowel preparation  if difficult surgery is anticipated Prophylactic heparin postoperative

D-SURGICAL MEASURES 1-Evaluation for other neoplasia 2-Myomectomy For symptomatic Pt who wish to preserve fertility Open myomectomy Laparoscopic myomectomy Hysteroscopic myomectomy 3-Hysterectomy Vaginal hysterectomy Abdominal hysterectomy 4-Uterine artery embolisation