Gynae Flashcards
Physiology of FSH?
Causes maturation of the ovum, and hence the increase in production of oestrogen.
Physiology of LH?
Causes the corpus luteum to form (release of egg- ovulation!), and hence the production of progesterone.
How does the cervix change during the menstrual cycle? (follicular phase + luteal phase)
Follicular phase –> ^ mucus production by cervix. Around ovulation, becomes more stringy + runny to facilitate sperm access.
Luteal phase –> becomes thicker + more elastic to protect the foetus from any microbes coming up vagina (mucus plug).
Purpose of the corpus luteum? (which marks the Luteal Phase- 14days)
Corpus Luteum continuously produces progesterone –> stabilises endometrium, makes more viable for embryo to implant, ^endometrium’s secretions, lipids, glycogen + blood supply.
What is the current classification of Abnormal Uterine Bleeding?
FIGO classification (PALM-COEIN) for causes of AUB in non-gravid women of reproductive age.
What is adenomyosis and what are the key characteristics?
Ectopic endometrial tissue WITHIN the uterus (embedded in the myometrium).
Therefore- uterus will be bigger (symmetrical lumps on bimanual), painful ‘vague pain’ and heavy bleeding!
What are the 3 types of leiomyoma (fibroid) and most common type?
Intramural (inside uterus muscle).
Subserous (fibroid out of uterus cavity- most common!)
Submucous (fibroid coming out of uterus cavity)
If a woman of CBA presents with heavy bleeding, what investigations would you do?
FBC
Coagulation screen
TFTs
Offer OPH/ US as 1st line (outpatient hysteroscopy- esp if Hx suggestive of endometrial pathology)
If no cause of heavy menstrual bleeding identified… Dysfunctional Uterine Bleeding! Management of this?
1st line= Mirena IUS
If doesn’t want hormones/severe pain too= Mefenamic/Tranexamic Acid.
IMB + PCB in WoCBA is suggestive of what?
Cervix: polyps, cervicitis, ectropion (v common!), cancer.
Endometrium: polyp, submucosal fibroid.
Post-menopausal bleeding- what are the 3 main causes and how do you manage women who present with PMB in GP?
Vaginal Atrophy (70%!) Endometrial hyperplasia/polyp (consider hysterectomy/ progesterones) Malignancy (10%)
Mx- must be sent for 2wk wait referral! Urgent USS + endometrial biopsy should be arranged.
(remember- women on combined HRT- bleeding during progesterone free period is normal)
What causes vaginal atrophy, and how can it be managed?
Reduced oestroen levels cause thinning of vaginal epithelium. Infection associated with this.
Reassure- can be normal!
Lube during sex/ estradiol creams if necessary.
In PMB, investigating the endometrial thickness with USS- what are the cut off points for biopsy?
If >3mm (or >5mm on HRT!) then biopsy required! (as ^likelihood of endometrial ca.)
This DOESNT apply to women on Tamoxifen who have a thickened endometrium and require a hysteroscopy.
Examination/Investigations of women who comes in with Abnormal Uterine Bleeding??
- Anaemia! (FBC!!!)
- Thyroid signs! (TFTs!!!)
- Check breast symptoms- as prolactin can be an important cause.
- Abdo exam for any masses (PCOS/fibroids may be felt).
- Pelvic exam for symmetry in uterus.
Reasons for Primary Amenorrhoea?
Normal sexual characteristics:
- Physiological (constitutional delay)
- Mullerian agenesis
- Imperforate hymen
- Androgen insensitivity syndrome
No sexual characteristics:
- Hypothyroidism (stress, exercise, low BMI)
- Primary ovarian insufficiency
- Chemo-radio
- Turner’s
Reasons for Secondary Amenorrhoea?
- Contraception
- Lactation
- Hypothyroidism
- Premature ovarian failure
- Hyperprolactinaemia
- Menopause
- Asherman’s
- Features of androgen excess: PCOS, Cushing’s, androgen secreting tumour.
Management of Primary Dysmenorrhoea? (onset usually within 2yrs of menarche)
(^ levels of prostaglandins - ^contractility of myometrium)
- NSAIDS: Mefenamic Acid + Ibuprofen (reduce production of uterine PGs)
- COCP/DEPOT progesterones (suppress ovulation)
- IUS
How do you diagnose PCOS?
Rotterdam Diagnostic Criteria! 2 out of 3:
- Irregular menstruation
- Signs/sx of ^ systemic androgens
- USS criteria of PCOS which is >12mm cycts, <9mm
Pathophysiology of PCOS?
Increased GnRH causes a basal increase in LH.
Compensatory insulin increase results in insulin resistance + hyperinsulinaemia.
Increased LH + hyperinsulinaemia causes ^output of ovarian androgens
Results in acne + hirsutism!
What do raised/normal/low levels of FSH show?
Raised- ovarian failure
Normal- PCOS
Low- hypothalamic disease
Markers of PCOS: FSH LH Prolactin Testosterone TSH
FSH- normal LH- often raised (but not diagnostic) Prolactin- exclude prolactinoma (pituitary tumour) Testosterone- raised TSH- to exclude thyroid dysfunction
Management of PCOS?
COCP- to regulate menstruation (need 3-4 bleeds/year to protect endometrium)
Metformin- for hyperinsulinaemia/ CVD risk
Clomiphene- used to induce ovulation when subfertility
Ovarian drilling
Lifestyle advice (BMI<30)
Physiology of the Menopause?
(usually- developing follicles in ovaries produce estradiol)
As menopause approaches - ^anovulation, so progesterone levels drop.
Therefore, ^FSH +LH levels (as less estradiol, so less -ve feedback to anterior pituitary)
What are measured to identify menopause?
Serum FSH >30IU/L (not reliable)
Anti-Mullerian hormone (better indicator of follicular reserve)
What is the basis of HRT?
Oestrogen replacement!! Oral oestrogens are usually given for 2-3 years.
When would you use Continuous Combined HRT?
Postmenopausal!
>1yr without a period.
(No bleed HRT)
Difference between Combined Cyclical, and Long Combined Cyclical HRT?
Combined- women with menopausal sx but still have regular periods. (withdrawal bleed every month)
Long combined- women with menopausal sx but have irregular periods. (withdrawal bleed every 3months)
What can be used for hot flushes/ vasomotor sx of the menopause?
Clinidine (acts directly on hypothalamus) and Gabapentin
What are the big risks of HRT?
- Breast carcinoma (risk ^ every year, but effect not sustained once HRT stopped)
- Endometrial carcinoma (^risk with unopposed oestrogen)
- VTE (also a contraindication of HRT)
Acute causes of Pelvic Pain?
a) Gynaecological
b) Non-gynaecological
a) Gynae:
- Ectopic pregnancy
- Ovarian cyst accident (grad onset, exclusively unilateral dysparaenia/palpation pain)
- Primary dysmenorrhoea
- Mittelschmerz
b) Non-gynae:
- Appendicitis
- IBS/IBD
- Strangulated hernia
- UTI
Chronic causes of Pelvic Pain?
a) Gynae
b) Non-gynae
a) Gynae:
- Pelvic adhesions
- Fibroids
- Cervical stenosis
- Asherman’s syndrome
b) Non-gynae:
- GI (constipation, hernia, IBS/IBD)
- Urological (interstitial cystitis, calculi)
Core symptoms of Endometriosis?
- Severe cyclical non-collicky pelvic pain (around time of menstruation)
- Pain on passing stool during menses (dyschezia)
- Deep dyspareunia (indicates endometriosis in Pouch of Douglas)
- Subfertility
- Chocolate cyst
What is Asherman’s syndrome?
Acquired condition, refers to the existence of scar tissue in uterus.
Sx include having light/no periods + subfertility.
What is a chocolate cyst?
An endometrial cyst on ovary that when ruptures, secretes blood resembling melted chocolate.
Rupture causes acute pain.
What is the GOLD STANDARD investigation for endometriosis?
Exploratory Laparoscopy:
- Active lesions (red vesicles/ punctuate marks on peritoneum)
- Less active (white scars/brown spots)
- Severe disease (ovarian endometriomas (cysts) )
Endometriosis management?
a) Medical?
b) Surgical?
a) Medical- mx mimics pregnancy (COCP/progesterone) OR menopause (GnRH). GnHR use limited to 6months.
b) Surgical:
- Laporascopic: ablation + excision of endometrial areas, combined with medical mx. This has become standard!
- Definitive surgery: hysterectomy + salpingo-oopherectomy.
What are the common infections associated with PID?
-Chlamydia trachomatis (20-30%) –Neisseria gonorrhoea (10-15%) –Mycoplasma genitalium (15%) –BV associated organism –Mycobacterium tuberculosis
What is a late complication of PID?
A tubo-ovarian abscess! Presents with a swinging fever.
Examination findings of PID?
- Lower abdo tenderness (usually bilateral)
- Adnexal tenderness on bimanual
- Cervical motion tenderness
- Fever >38 in moderate-severe