OBGYN Flashcards
indication for endometrial biopsy
> 4mm endometrial stripe on TV-US
indications for D+C
- molar pregnancies
- termination 4-12 wks gestation
- may be used post-miscarriage to ensure empty
medical abortion meds / timeline
MIFEPRISTONE + MISOPROSTOL - safe up to 9 wks
- mifepristone given first (progestin antagonist)
- misoprostol 24-72 after (prostaglandin analog –> contract)
METHOTREXATE + MISOPROSTOL - safe up to 7 wks
- methotrexate, misoprostol 3-7 days after
- methotrexate is folic acid antagonist
follicular phase
Days 1-14 Follicular (Proliferative) Phase
ESTROGEN PREDOMINATES
-pulsatile GnRH from hypothalamus –> inc FSH and LH from pituitary to stimulate ovaries
Ovaries
- inc FSH causes FOLLICLE AND EGG MATURATION
- inc LH STIMULATES maturing follicle to MAKE ESTROGEN
Endometrium
-ESTROGEN CAUSES THICKENING (PROLIFERATIVE)
- ESTROGEN CAUSES NEGATIVE FEEDBACK IN HPO system (hypothalamus-pituitary-ovarian)
- inc levels of estrogen inhibit hypothalamic GnRH release as well as pituitary release of LH and FSH so no new follicles mature
menstruation
First days of Follicular phase
- if egg not fertilized, the corpus luteum soon deteriorates
- FALL OF PROGESTERONE AND ESTROGEN
- endometrium no longer supported –> sloughs
- negative feedback on GnRH subsides causing inc pulsatile GnRH secretion –> inc FSH and LH wich starts follicle maturation process over
ovulation
Days 12-14 (part of follicular phase)
- inc estrogen being released from mature follicle switches from NEGATIVE –> POSITIVE FEEDBACK on GnRH causing mutual INC ESTROGEN, FSH, LH
- sudden LH SURGE CAUSES OVULATION
luteal phase
Days 14-28 (aka Secretory Phase)
PROGESTERONE PREDOMINATES
-LH surge also causes ruptured follicle to become the CORPUS LUTEUM –> SECRETES PROGESTERONE and estrogen to maintain endometrial lining
If pregnancy occurs:
- blastocyst keeps the corpus luteum functional (secreting estrogen and progesterone, which keeps endometrium from sloughing)
- if no implantation, corpus luteum degenerates, leading to steep decreases in estrogen and progesterone –> leads to menstruation
GnRH pulses
> 1 per hour favors LH secretion
less frequent pulses favor FSH secretion
abnormal (dysfunctional) uterine bleeding
ABNORMAL FREQ/INTENSITY OF MENSES DUE TO NONORGANIC CAUSES (dx of exclusion)
Etiologies: CHRONIC ANOVULATION (90%) -due to disruption of HPA -esp w/ EXTREMES OF AGE -UNOPPOSED ESTROGEN - w/out ovulation there is no progesterone = unopposed estrogen --> endometrial overgrowth w/ IRREGULAR, UNPREDICTABLE SHEDDING
OVULATORY (10%)
-REGULAR CYCLICAL SHEDDING
+ovulation with prolonged progesterone secretion (due to low estrogen levels) –> inc blood loss from endometrial vessel dilation and prostaglandins
- dx-
- DIAGNOSIS OF EXCLUSION - r/o reproductive, systemic, iatrogenic causes (no evid of organic cause and negative pelvic exam)
- W/U: hormone levels, TV US, endometrial bx if stripe >4mm or women >35y to rule out hyperplasia or CA
- tx-
- ACUTE SEVERE BLEEDING –> HIGH DOSE IV ESTROGENS OR HIGH DOSE OCP (reduce as bleeding improves)
- ANNOVULATORY –> OCP 1ST LINE
- regulates cycle, thins endometrial lining and reduces flow)
- progesterone if estrogen c/i; GnRH agonists cause tempory amenorrhea
- OVULATORY –> OCP, progesterone (orally or IUD), GnRH agonists
- SURGERY - if no response (hysterectomy definitive), ablation
dysmenorrhea
PAINFUL MENSTRUATION, affects normal activities
PRIMARY - NOT DUE TO PELVIC PATHOLOGY
-INC PROSTAGLANDINS –> painful uterine muscle wall activity
SECONDARY - DUE TO PELVIC PATHOLOGY
-endometriosis, adenomyosis, leiomyomas, adhesions, PID
- tx-
- NSAIDS 1ST LINE (inhibits prostaglandin-mediated uterine activity) - best to start before onset of sx
- local heat, vit E started 2 days prior
- OVULATION SUPPRESSION: OCP
- Laparoscopy (r/o secondary causes)
PMS
- cluster of physical, behavioral and mood changes w/ cyclical occurance in LUTEAL PHASE
- sx in 75-85% patients, significant disruption in 5-10%
- sx-
- physical, emotional, behavioral
- dx-
- SX INITIATE DURING LUTEAL PHASE (1-2 WKS BEFORE MENSES), RELIEVED W/IN 2-3 DAYS OF THE ONSET, PLUS AT LEAST 7 SX FREE DAYS DURING FOLLICULAR PHASE
- tx-
- lifestyle: stress reduce, caffiene reduce, NSAIDs, vit B6, E
- SSRIs
- OCPs (DROSPERINONE-CONTAINING OCPs for PMDD)
amenorrhea
W/U: pregnancy test, serum prolactin, FSH, LH, TSH
PRIMARY - FAILURE OF MENARCHE ONSET by 15yo (w/ 2ry char) or 13yo (w/ absence of 2ry char)
- Breast + Uterus: OUTFLOW OBSTX –> transverse vaginal septum, imperforate hymen
- Breasts no Uterus: MULLERIAN AGENESIS, ANDROGEN INSENSITIVITY
- Uterus no Breasts: ELEVATED FSH/LH = OVARIAN CAUSES; NORMAL/LOW FSH/LH = HPA AXIS FAILURE
SECONDARY - ABSENCE OF MENSES FOR >3 MO IN PT W/ PREVIOUSLY NORMAL MENSTRUATION
-PREGNANCY MC
- HYPOTHALAMUS DYSFX
- disruption of normal pulsatile hypothalamic secretions of GnRH that lead to dec FSH/LH (anorexia, exercise, stress, nutritional, systemic disease)
- dx- NORMAL/LOW FSH + LH, low estrodial, norm prolactin
- tx- CLOMIPHENE (stim gonadotropin secretion)
- PITUITARY DYSFX
- ex. prolactin-secreting pituitary adenoma
- dx- DEC FSH + LH, INC PROLACTIN (inhibits GnRH)
- tx- surgery
- OVARIAN DISORDERS
- PCOS, PREMATURE OVARIAN FAILURE, follicular failure or resistance to LH or FSH, TURNER’S SYNDROME
- dx- INC FSH + LH, DEC ESTRADIOL –> OVARIAN ABNORMALITIES
- PROGESTERONE CHALLENGE TEST (pos w/drawl bleeding –> ovarian)
- UTERINE DISORDER
- SCARRING OF UTERINE CAVITY (ASHERMAN’S SYNDROME = ACQUIRED ENDO SCAR)
- dx- pelvic US, absence of normal endo stripe
- tx- estrogen tx to stimulate endometrial regeneration
menopause
CESSSATION >1 YEAR DUE TO LOSS OF OVARIAN FX
-premature before 40yo (mc in DM, smokers, vegetarians, malnourished)
-sx- ESTROGEN DEFICIENCY CHANGES
-dx- FSH ASSAY MOST SENSITIVE INITIAL TEST
(INC SERUM FSH >30)…x3
-INC SERUM FSH, LH, DEC ESTROGEN (due to depletion of ovarian follicles)
-Estrone is primary estrogen after menopause
-loss of estrogen’s protection –> inc osteoporosis, inc cardiovascular risks, inc lipids
- tx-
- ESTROGEN ONLY - most effective, inc risk endometrial cancer (unopposed) so GOOD FOR PT W/OUT UTERUS
- risk of THROMBOEMBOLISM
- ESTROGEN + PROGESTERONE - pt w/ uterus
leiomyoma (uterine fibroids) fibromyoma
LEIOMYOMA: BENIGN UTERUS SMOOTH MUSCLE TUMOR
- GROWTH RELATED TO ESTROGEN PRODUCTION
- 5X MC AFRICAN AMER, ESP >35
- sx-
- BLEEDING MC PRESENTATION
- pressure/pain related to size, bladder sx
- LARGE, IRREGULAR, HARD MASS DURING BI-MANUAL
- dx-
- PELVIC US
- tx-
- OBSERVATION, tx determined by sx, desire for fertility
- LEUPROLIDE (GnRH inhibition –> dec estrogen = dec endometrial growth) shrinks uterus 50% but will return
- SX - MYOMECTOMY (PRESERVE FERTILITY) OR HYSTERECTOMY DEFINITIVE; ablation
adenomyosis
ISLANDS OF ENDOMETRIAL TISSUE W/IN MYOMETRIUM
-mc later in repro years
- sx-
- MENORRHAGIA, DYSMENORRHEA, +/- infertility
- TENDER, SYMMETRICALLY, BOGGY UTERUS
- dx-
- exclusion of 2ry amenorrhea, MRI
- definitive: post-total abdominal hysterectomy examination
- tx-
- TOTAL ABDOMINAL HYSTERECTOMY - ONLY EFFECTIVE
- conservative/fertility: analgesics, low dose OCPs
endometritis
INFECTION OF UTERINE ENDOMETRIUM
- chorioamnionitis (fetal membrane infx)
- RF: POSTPARTUM OR POSTABORTAL INFX (C-SECTION BIGGEST RF), prolonged rupture of membranes >24h, vag delivery, D+C
- dx-
- FEVER, TACHY, ABD PAIN AND UTERINE TENDERNESS AFTER C-SECTION, 2-3 days post-abortal
- tx-
- POST-C-SECTION or VAG DELIVERY –> CLINDA + GENT (may add amp for group B strep coverage)
- PROPHYLAXIS W/ 1ST GEN CEPHALOSPORIN X 1 DOSE DURING C-SECTION
endometriosis
ECTOPIC ENDOMETRIAL TISSUE
- OVARIES MC SITE, posterior cul de sac
- RF: NULLIPARITY, ONSET <35y
- sx-
- TRIAD: CYCLIC PREMENSTRUAL PELVIC PAIN, DYSMENORRHEA, DYSPAREUNIA, DYSCHEZIA
- Infertility >25% cause of female
- dx-
- LAPROSCOPY W/ BIOPSY DEFINITIVE
- ENDOMETRIOMA “CHOCOLATE CYST”
- tx-
- OVULATION SUPPRESSION VIA OCPs
- progesterone, leuprolide, danazol
- sx-
- CONSERVATIVE LAPAROSCOPY W/ ABLATION
- TAH-BSO
endometrial hyperplasia
ENDOMETRIAL GLAND PROLIFERATION –> precursor to endometrial cancer, MC POST-MENOPAUSE
-HYPERPLASIA DUE TO CONTINUOUS INC UNOPPOSED ESTROGEN –> chronic anovulation, PCOS, perimenopause, obesity (androgen converts to estrogen in fat)
- sx-
- POST-MENOPAUSAL BLEEDING
- dx-
- TV-US, ENDO STRIPE >4MM
- ENDO BX DEFINITIVE
- tx-
- w/out atypica –> PROGESTIN, repeat bx in 3-6 mo
- w/ atypica –> TAH +/-BSO
endometrial cancer
MC GYNECOLOGIC MALIGNANCY IN US!
- MC POSTMENOPAUSAL, 50-60Y PEAK
- ESTROGEN-DEPENDENT –> RF: INC ESTRO EXPOSURE (nulliparity, chonic anovulation, PCOS, obesity, ERT, late menopause, tamoxifen)
-COMBO OCP PROTECTIVE AGAINST BOTH OVARIAN AND ENDOMETRIAL CA
- sx-
- POSTMENOPAUSAL / ABNORMAL BLEEDING
- dx-
- ENDO BX –> ADENOCARCINOMA MC
- US –> STRIPE >4MM
- tx-
- Stage I: HYSTERECTOMY (TAH-BSO) +/- radiation
- Stage II, III: TAH-BSO + lymph node excision +/- radiation
- Stage IV: systemic chemo
postmenopausal bleeding
etiologies:
- MC BENIGN: vaginal/endometrial atrophy, cervical polyps, submucosal fibroids, 10% ENDO CA
- dx-
- any post-meno bleeding not on HRT should raise suspicion for endo ca, hyperplasia or leiomyosarcoma
- TV-US –> <4mm, repeat in 4 mo, if continues –> bx
pelvic organ prolapse
RF: weakness of pelvic support structures, MC after childbirth, inc pelvic floor pressure (multiple vag births, obesity, heavy lifting)
CYSTOCELE: POSTERIOR BLADDER HERNIATING INTO ANTERIOR VAGINA
ENTEROCELE: POUCH OF DOUGLAS (SMALL BOWEL) INTO UPPER VAGINA
RECTOCELE: DISTAL SIGMOID COLON/RECTUM INTO POSTERIOR DISTAL VAGINA
- sx-
- PELVIC OR VAG FULLNESS, HEAVINESS “FALLING OUT” SENSATION
- low back pain, vag bleed, purulent discharge, urinary sx
- BULGING MASS ESP W/ INC ABD PRESSURE / VALSALVA
- tx-
- PROPHYLACTIC –> KEGALS, wt control
- pessaries, estrogen tx (improves atrophy)
- surgical: hysterectomy; uterosacral or sacrospinous ligament fixation
functional ovarian cysts
FOLLICULAR CYSTS - when follicles fail to rupture and continue to grow
CORPUS LUTEAL CYSTS - fail to degenerate after ovulation
- sx-
- most asymptomatic until rupture, undergo torsion or become hemorrhagit –> UNILATERAL RLQ OR LLQ PAIN
- dx-
- PELVIC US
- tx-
- SUPPORTIVE: most <8cm are functional and usually spontaneously resolve –> rest, NSAIDs, repeat US in 6 wks
- OCPs prevent but don’t treat existing ones
- if >8cm or postmenopause –> +/-laparoscopy/laparotomy
ovarian cancer
2ND MC GYNECOLOGIC CANCER
- HIGHEST MORTALITY OF ALL GYNECOLOGIC CA
- RF: FAM HX, INC NUMBER OVULATORY CYCLES, BRCA1/2, peutz-jehgers, turner’s syndrome
- sx-
- rarely sx until late in disease (extensive mets)
- presents usually 40-60s
- abd fullness/distention, back/abd pain, urinary freq
- irregular menses, menorrhagia, postmeno bleed, constipation
- palpable abdominal or ovarian mass (solid, fixed) ASCITES
- SISTER MARY JOSEPH’S NODE = METS UMBILICAL
- dx-
- BIOPSY –> 90% EPITHELIAL, germ cell in pt <30y
- TV-US useful screen in high-risk patients, mammography to look at 1ry in breast
- tx-
- Early: TAH-BSO + selective lymphadenectomy
- Sx: tumor debulking; SERUM CA-125 USED TO MONITOR TX PROGRESS
- Chemo
dermoid cystic teratomas
mc benign ovarian neoplasms
-remove due to potential risk of torsion or malig transform
PCOS
Triad: AMENORRHEA, OBESITY, HIRSUTISM (androgen excess)
- PCOS due to insulin resistance; 10% of pop
- assoc w/ abnormal fx of HPO-axis –> inc insulin and inc LH-driven in ovarian androgen production
- sx-
- MENSTRUAL IRREGULARITY
- INC ANDROGEN –> HIRSUTISM, acne, male pattern bald
- INSULIN RESISTANCE –> DM2, OBESITY
- BILAT ENLARGED, SMOOTH, MOBILE OVARIES, ACANTHOSIS NIGRICANS
- dx-
- exclude: thyroid, pituitary adenoma (prolactin), ovarian tumors, cushing’s (dexa suppress test)
- labs: INC TT, LH:FSH RATIO >3:1 (normal 1.5:1)
- GnRH agonist stimulation test –> rise in serum hydroxyprogesterone
- lipid panel, GTT
- PELVIC US –> STRING OF PEARLS, ENLARGED OVARIES W/ PERIPH CYSTS
- tx-
- COMBO OCP –> NORMALIZE BLEEDING AND SUPPRESS ANDROGEN
- SPIRONOLACTONE (BLOCKS TT RECEPTORS)
- Infertility –> Clomiphene, metformin
- complications:
- chronic anovulation –> inc risk infertility and endometrial hyperplasia or cancer
pap smear cervical cytology
ASC-US - atypical squamous of undetermined significance
- if >25yo can do HPV test (negative, repeat PAP/HPV in 3 years; if positive –> colposcopy w/ bx)
- or no HPV test and repeat PAP in 1y (also for <21yo)
ASC-H - atypical squamous cells, can’t exclude HSIL
- higher chance of ca than ASCUS
- COLPOSCOPY
LSIL - low grade squamous intraepithelial lesion
- mc seen w/ TRANSIENT HPV INFECTION
- 50% regress in 2y, may progress to ca in 7y
- 25-29yo –> COLPOSCOPY W/ BX
- > 30y –> TEST HPV (neg, repeat in 1y)
HSIL - high grade squamous intraepithelial lesion
- include CIN II, CIN III, + CARCINOMA IN SITU
- COLPO W/ BX FOR ALL AGES
cervical biopsy histology results
- MC ASSOC W/ HPV (CIN = cervical intraepithelial neoplasia) is precursor to cervical ca
- TRANSFORMATION ZONE (SQUAMOCOLUMNAR JX) OF CERVIX IS HIGHEST RISK FOR MALIG
LSIL
- changes seen w/ HPV
- CIN I = MILD DYSPLASIA
- OBSERVE (75% resolve 1 y) or EXCISION VIA LEEP OR COLD KNIFE CONE
HSIL
- usualy from persistent HPV infx, often P-16 pos
- CIN II + CIN III (MOD - SEV), FULL THICKNESS –> IN SITU
- EXCISION (LEEP OR COLD KNIFE CONE) or ABLATION (CRYOCAUTERY, LASER CAUTERY OR ELECTROCAUTERY)
cervical cancer
- HPV ASSOC W/ 99.7% ESP 16, 18 (70%), 31, 33, 45
- 3rd mc gyn cancer
- 45y ave age diagnosis, local mets
- RF: smoking, CIN, DES exposure (diethylstilbestrol was synthetic estrogen used in OCP), immunosuppressed
- takes 2-10 yrs for ca to penetrate basement membrane
- sx-
- POST COITAL BLEEDING/SPOTTING MC, metrorrhagia, pelvic pain +/- watery discharge
- dx-
- COLPO W/ BX
Gardasil
-Rec: given at 11 up to 26y
- Gardasil Quad: 6, 11, 16, 18
- Gardasil 9: same + 31, 33, 45, 52, 58
-Schedule:
-<15y, receive 2 doses at least 6 mo apart
->15y, receive 3 doses over minimum of 6 mo (0, 2, 6mo)
minimal is 0, 1, 4mo
-c/i if immunosuppressed, pregnant or lactating
ACOG screen guidelines
- initiate: 21
- discontinue: 65
- age 21-29 –> pap every 3y
- can consider primary HPV testing q3y for >25y
- age >30 –> pap + HPV (co-testing) q5y preferred
- pap every 3y
- can consider primary HPV testing q3y for >25y
cervical insufficiency (incomplete cervix)
- inability to maintain pregnancy 2ry to PREMATURE CERVICAL DILATION (ESP IN 2ND TRI)
- RF: prev cervical trauma or procedure, uterus defects, DES exposure in utero, multiple gestations
- sx-
- bleeding, vag discharge, esp in 2nd tri
- PAINLESS DILATION + EFFACEMENT OF CERVIX
-tx-
-CERCLAGE AND BED REST
+/- weekly injection of 17 a-hydroxyprogesterone in some women w/ preterm birth hx
Bartholin cyst/abscess
- bartholin duct obstx –> retained secretions –> gland enlargement
- may be infectious
- sx-
- INFECTED: TENDER, unilateral vulvar mass, edema/inflam
- NON-INFECTED: NONTENDER, unilateral at duct location
- dx-
- CBC, cultures
- tx-
- infected –> I+D w/ antibiotics
- non-infected –> no intervention needed if asymptomatic