Paediatric gynaecology and pelvic pain Flashcards
Discuss ambiguous genitalia
-Incidence
-Causes - 3 groups
- Incidence: 1:4000. 50% secondary to CAH
- Causes
Virilization of female karyotype (46XX)
-CAH most common
-Exposure to maternal androgens
-Placental aromatase deficiency
Under masculinisation of male karyotype 46XY
-Partial gonad dysgenesis - Swyers
-Complete or partial androgen insensitivity syndrome
-Defect in testosterone biosynthesis
-5-alpha reductase deficiency -converts testosterone to DHT (Important for peripheral virilization)
Mosacism of XX and XY - true hermaphrodism - 20% of DSD
What investigations should be done to investigate disorders of sex development (ambiguous genitalia)
-4 groups
- FISH and Karyotype
- Bloods
-Serum 17 hydroxyprogesterone levels (CAH)
-Urea and electrolytes (CAH with salt wasting)
-Synacthen test
-Basal GnRH FSH and LH
-Androgen levels - basal and HCG stimulated (Functioning sertoli cells produce testosterone with HCG stimulation)
-AMH - low in dysgenic gonads - USS - check for uterus and ovaries
- EUA to assess morphology of urogenital sinus
How should disorders of sex development (Ambiguous genitalia) be managed?
-Who should be involved
-What are the most important first steps
-What surgery should be considered
- Do not guess genitalia at birth
- MDM approach should be taken lead by paeds endocrinologist/ urologist/psychologist
- 50% of DSD caused by CAH. Needs to assess and correct salt wasting
- Do full work up for causes and then discuss with parents
- Consider gonadectomy when
-non-virilized 46XY assigned to female. PAIS - 30% chance of malignancy - do straight away. CAIS 3% chance can wait. - Consider feminising surgery with child input
Discuss Congenital Adrenal Hyperplasia
-Incidence
-Pathophysiology
-Presentation
-Management
- Incidence
-Most common DSD 50%
-1:10,000 - Pathophysiology
-Caused by 21 hydroxylase deficiency in 90% of cases
-Caused by shunting steroid production towards testosterone resulting in reduced costisol and aldosterone - Presentation
-Diagnosis is high levels of 17-OH hydroxyprogesterone. If equivocal then synachten test can be done
-Causes varying degrees on virilisation due to androgen excess
-May only be picked up at puberty. Hard to distinguish from PCOS - Management
-Hydrocortisone
-Manage salt wasting early
Discuss androgen insensitivity
-Types
-Incidence
-Pathophysiology
-Presentation
-Management
- Incidence - 1:40-60,000 CAIS>PAIS
- Complete androgen insensitivity and partial androgen insensitivity
- Pathophysiology
-x-linked inheritance
-Normal testicular function but abnormal androgen receptors
-Testes produce AMH causing regression of Mullarian structures so absent fallopian tubes, uterus, and upper 2/3rds of vagina. - Presentation
CAIS - normal female appearance but short vagina. Picked up with primary amenorrhoea usually
PAIS - Ambiguous genitalia with varying virilisation
Dx with rise in testosterone after HCG stimulation test - Management
-Disclose 46XY karyotype and implications for reproduction and menstruation (can’t)
-CAIS - 3% chance of gonads causing malignancy - consider removing after puberty.
-Estrogen replacement, vaginal expansion or dilators
-PAIS - 30% chance of malignancy - remove immediately
Discuss 5 alpha reductase deficiency
-Incidence
-Pathophysiology
-Presentation
-Management
- Rare
- Caused by lack of enzyme which converts testosterone to DHT (dihydrotestosterone).
DHT important for peripheral virlisation - Presentation
Ambiguous or female genitalia. Virlisation seen at puberty
Dx: Normal testosterone, decreased DHT - Gondectomy at puberty if raised female to avoid virilisation
Discuss the embryology of the genital tract
- The mullerian ducts for the female genitalia
- Production of testosterone + AMH from XY fetus suppresses mullerian duct formation
- Where testosterone + AMH is absent the female genitalia develop
- The mullerian ducts form the fallopian tubes uterus and upper vagina
- The external genitalia develop from the genital tubercule -clitoris, labioscrotal swelling - labia majora and urogenital folds - lower vagina
What are the Fraser Guidelines for competency of minors
-5 guidelines
- That she understands the advice
- That the health care professional cannot persuade her to inform her parents or are not allowed to inform them
- That she is already having sex or will start and do so without contraception if not provided
- That her physical +/- mental health is likely to suffer without contraception
- That it is in the best interests of the girl to have contraception without parental consent
Discuss congenital anomalies of the genital tract
-Incidence (4)
-Pathophysiology
-Classification
- Incidence
-5% in unselected population
-8% in infertile women
-13% in women with miscarriage
-25% in women with infertility and miscarriage - Defect in Mullerian duct embryology
- Classification
-ASRM classification system
I - Hypoplasia/Agenesis
II-IV - Unification defects
V-VI - Canalisation defects
VII - DES defects
Describe the ASRM classification of uterine congenital abnormalities
-7 types
-Definitions
- Bicorunate - external fundal indentation>1cm
- Didelphys - different levels of fusion.
- Septate - septum >1.5cm and <90 degrees (T shaped)
- Arcuate - septum <1cm and angle of indentation>90 degrees, big scoop
How does congenital genital abnormalities present (7)
- Primary amenorrhoea
- +/- cyclical abdo pain
-Seen with imperforate hymen, transvaginal septum, cervical agenesis, uterine agenesis - Dysmenorrhoea
-Seen with non-communicating or obstructed horn - Dysparenunia
-Seen with transverse septum - Infertility
- Miscarriage
- Obstetric complications
- High rates of endometriosis - increased rate of retrograde menstruation
How should congenital genital tract abnormalities be investigated (5)
-Screening
-Dx
- USS or HSG for screening
- 3D TVUSS - diagnosis
- MRI - diagnosis
- Laparoscopy / hysteroscopy - traditional dx method
- Image kidneys as 50% in Type I+II have renal abnormalities
What are the reproductive implications for congenital genital anomalies and mechanisms?
-Antenatal (4)
-Intrapartum (2)
-Postpartum (1)
- Antenatal
-Infertility, miscarriage, IUGR, PET/BP
-Due to abnormal endometrium / placental insertion site / poor/disordered blood supply - Intrapartum
-Labour dystocia
-Increased risk for CS - Postpartum
-PPH - due to incordinate uterine contractions + retained placenta
Discuss reproductive implications for congenital uterine anomalies by type
-Canalisation defects (5)
-Unification defects -Bicornuate and unicornuate (4)
-Unification defects - didelphys (3)
- Canalisation defects - septate and subseptate
-Worst reproductive outcomes
-Reduced conception rate OR 0.86
-Increased first T miscarriage OR 2.9
-Preterm birth - OR 2.14
-Fetal malpresentation - OR 6.14 - Unification defects - bicornuate and unicornuate
-No effect on fertility
-Increased first T miscarriage OR 3.4
-Increased preterm birth - OR 2.55
-Fetal malpresentation - 5.89 - Unification defects - didelphys
-No effect on fertility
-Increased preterm birth - OR 3.58
-Fetal malpresentation - OR 3.7
Discuss the management of congenital genital tract anomalies
-Imperforate hymen
-Vaginal septum
-Cervical agenesis
-Non-communicating horn with functional endometrium
-Bicornuate or didelphic uterus
-Septate or subseptate uterus
- Surgical resection of hymen
- Surgical resection of septum
- Anastamosis of uterus to vagina laparoscopically
- Excision of horn (open or laparoscopically)
- Strassman procedure - abdominal metroplasy - doesn’t improve reproductive outcomes
- Hysteroscopic resection of septum
- unclear if improves reproductive outcomes
-Do in early follicular phase for visualisation
Discuss Mayer-Rokitansky-Kuster-Hauser syndrome
-What it is
-Incidence
-Pathophysiology
-Presentation (4)
-Management (5)
- Absent or rudimentary uterus or bilateral rudimentary horns on either pelvic side wall, absence of upper 2/3rd of vagina.
- Incidence: 1: 4-6,000
- Agenesis or hypoplasia or Mullerian ducts. Multifactorial
- Presentation
-Primary amenorrhoea 70%
-Short vagina
-Normal other secondary sexual characteristics
-Associated with renal, auditory, cardiac and skeletal anomalies - Management
-Pyschological - sterile
-Surrogacy for fertility
-Enlarge vagina with dilators alone or post surgery
-Enlarge vagina with surgery
-McIndoe-Reed - vagina from buttock grafts
-Bowel Vaginoplasy - made from sigmoid
-Davydov - Lined with pelvic peritoneum
-Vecchitti - synthetic olive placed on tension
-Investigation and management of associated anomalies
Discuss precocious puberty
-Definition
-Incidence
- Definition
-Onset of pubertal development before age 8
-Onset of menarche before age 9 - Incidence
-0.2-2%
-Incidence is ethnicity dependent
-Female to male ration 5:1
-80% central causes; 20% peripheral causes
Discuss the causes of precocious puberty
1. Central causes
2. Peripheral causes
- Central causes - true precocious puberty - 80%
-Gonadotrophic dependant
-80% idiopathic
-Brain tumours / cysts / trauma / congenital / hydrocephalus / radiation / Infiltrative
-Specific gene mutations - Peripheral causes
-Exposure to exogenous sex steroids
-Chronic primary hypothyroidism
-Ovarian tumour - 2-5% (Mostly Granulosa cell tumours)
-Feminising adrenal tumours
-McCune Albright syndrome
-G protein mutation leading to continual activation despite absence of hormonal stimulation.
-Associated with cafe au lait spots and fibrous dysplasia
Discuss puberty
-Definition
-Timing of onset
-Order of anatomical changes
-Pathophysiology
- Definition
-Time between childhood and adulthood when sexual and reproductive maturation occurs - Average age of onset ethnicity dependent
-12.3 Blacks, 12.8 Whites
-Normal 8-12 yrs - Boobs, pubes, spirt, squirt
-Thelarche - 8-13
-Adrenarche - 3 months after Thelarche
-Growth - 9.5-14.5 yrs
-Menarche 4th by 2-3 yrs post thelarche - Pathophysiology
-GnRH, FSH and LH low and HPO axis quiescent
-Increase in pulsitile GnRH in frequnecy and amplitude.
-Initially noctunal pulsations only
-Increase GnRH leads to increase FSH and LH
-Increase LH and FSH leads to steroidogenesis and folliculogenesis leads to increased estrogen
-Increased estrogen leads to thelarche
-GnRH pulsations during the day allow for ovulation and menarche
Discuss the management for precocious puberty
1. Who should manage
2. Central precocious puberty
3. Peripheral precocious puberty
- Treatment should be by paediatric endocrinologist
- Central precocious puberty
-GnRH analogues - zoladex / Lucrin
-Stops or reverses puberty
-Continue until 10 or 11.
-Give psychological support
-Monitor yearly, growth, bine maturation - Peripheral causes
-Surgical tumour resection
-McCune Albright syndrome
-block action or biosynthesis of estrogen (Letrozole)
-Remove exposure to exogenous sex steroids
-Monitor growth and bone age annually
-Stop treatment at normal age for puberty
Discuss delayed puberty
-Definition
-Incidence
-Causes - 2 groups
- Definition
-Absence of secondary sexual characteristics by 13yrs
-No menstruation by 16yrs or 3 yrs after breast development - Incidence - 2.5% of population
- Causes:
Hypogonadotrophic hypogonadism - No GnRH to stimulate FSH and LH
-Constitutional delay (Esp if fam Hx)
-Chronic illness
-Functional - excess exercise, anorexia, stress
-Kallmans Syndrome
-Hydrocephalus, CNS tumour, infiltrative disease, pituitary adenoma, panhypo
Hypergonadotrophic hypogonadism - Non functional gonads
-POI
-Turners syndrome
-Swyers syndrome
-Premature ovarian failure
-Chemotherapy / radiotherapy
-Autoimmune / infection / Toxins
-Gonadal agenesis
Discuss the management of delayed puberty (8)
- Administer small doses of oestrogen with increasing amount until breast development complete / break through bleeding. Small doses doesn’t imped growth
- Add in progesterone (cyclical) - can use COCP
- If Hypogonadotrophic hypogonadism can use pulsatile GnRH
- In those with gonadal failure need estrogen and progesterone for bone and heart protection
- If patient has Y chromosome consider gonadectomy given malignancy risk
- Fertility requires oocyte donation
- Psychological support
- Improve nutritional intake and mineral supplementation
Discuss Kallman’s syndrome
1. Incidence
2. Pathophysiology
3. Presentation
- 1: 7500 females 7:1 ratio F:M
- Pathophysiology
-Dysgensis of olfactory bulbs and GnRH neurons
-X - linked
-Mutation in Kal-1 gene - Presentation
-Anosmia and delayed puberty
Discuss Turners Syndrome
-Incidence
-Pathophysiology
-Presentation
-Management
- 1:2500
- Pathophysiology
-45 XO female phenotype - Presentation
-Antenatal - cystic hygroma, IUGR, non0immune hydrops
-Short stature, neck fold, low hair line, wide space nipples
-Aortic coarctation, renal abnormalities, rudimentary ovaries
-Delayed puberty (Menopausal level at puberty), insulin resistance, hypothyroid - Management
-Growth hormone for height
-Induction of puberty with estradiol (Peripheral cause)
-Long term HRT for heart and bone health
-Fertility with egg donation
-Breast implants if concerned
Discuss Swyers syndrome
-Incidence
-Pathophysiology
-Presentation
-Management
- Rare
- Pathophysiology
-46XY with genetic mutation in SRY gene = no AMH or testosterone = female genitalia but gonadal dysgenesis
-Uterus and cervix small as no estrogen from gonads - Presentation:
-Primary amenorrhoea
-Small undeveloped breasts and sparce pubic hair (some androgens from adrenals) - Management:
-Induction of puberty
-Gonadectomy as risk of malignancy 30%
-Long term HRT
-Child bearing with egg donation