Menstrual period and urogynaecology Flashcards
Primary amenorrhoea
- No menstruation by the age of 14 years accompanied by failure to develop sec. sexual characteristics.
- No menstruation by age of 16 when growth and sexual development are normal.
Secondary amenorrhoea
- Secondary absence of menses for six months (or greater than 3 times the previous cycle interval) in a women who has menstruated before.
- Pregnancy, lactation or hysterectomy must be excluded
- Prepubertal and post-menopausal conditions are also to be excluded as physiological causes
Amenorrhoea- outflow tract anomalies
- Imperforate hymen
- Transverse vaginal septum- failure of the Mullerian derived upper vagina to fuse with the urogenital sinus derived lower vagina
- Vaginal agenesis
- Testicular feminisation
- Asherman’s syndrome
Amenorrhoea- Cryptomenorrhoea
- Absence of normal vaginal opening or imperforate hymen, prevent menstrual loss from escaping
- Features: primary amenorrhoea in a teenage girl with normal sexual development present
- Complaining of lower abdo pain, possible difficulty of mict, palpable lower abdo swelling (haematometra). Bulging, bluish membrane at the lower end of the vagina (Haematocopos).
- Management: incise membrane
Amenorrhoea- Testicular feminisation (androgen insensitivity)
- Phenotype is woman. Genotype is man (xy) testes are present and mullerein inhibiting factor, testosterone levels as in male. Treatment: gonadectomy after puberty (HRT), there is a germ cell malignancy risk
- Treatment: vaginal reconstruction (dilation vs vaginoplasty)
- Inherited by an X-linked recessive gene… (familial)
- Resulting in absence of cytosol androgen receptor
Amenorrhoea- Asherman’s syndrome
- Secondary amenorrhoea following distruction of the endometrium by overzealous curettage, multiple synechae show up on Hysterography
- Management: under general anaesthetic, breakdown intrauterine adhesions through hysteroscope. Insert an IUCD to deter reformation and use hormone therapy
- When scar tissue, adhesions form within the uterus/cervix
Ovarian causes of amenorrhoea
- Chromosomal abnormalities- turner syndrome -> gonadal dysgenesis
- Gonadal agenesis: failure of gonadal development, no other congenital abnormalities
- Resistant ovary syndrome
- Premature menopause
- PCOS
PCOS
Most common cause of amenorrhoea
1. Mostly present with classical Stein-Leventhal syndrome (oligomenorrhoea, obesity, hirsuitism, and infertility).
2. Many women will have sec. amenorrhoea with no obesity or hirsuitism
3. Diagnosis is made by finding increased LH/FSH ratio +/- raised androg
4. USS + polycystic ovaries
5. Association with subfertility type 2 Diabetes and endometrial hyperplasia
Premature menopause
- Ovarian failure <40 years of age
- Auto-immune disease associated with Addisons
- Viral infection i.e. Mumps
- Cytotoxic drugs/radiotherapy
Pituitary causes of amenorrhoea
- Pituitary tumour causing hyperprolactinaemia. 40% of patients with hyperprolactinaemia will have a pituitary adenoma. Causes secondary amenorrhoea, can cause visual changes and some milk discharge from the nipple
- Craniopharyngioma- other intracranial tumour
- Sheehans syndrome- necrosis of the anterior pituitary due to severe PPH. Pan or partial hypopituitarism
- Other causes of increased prolactin- Drugs i.e. phenothiazine, methyldopa, metoclopramide, anti-histamines and morphine
Hypothalamic amenorrhoea
- Classic Kallmann syndrome (KS) and idiopathic hypogonadotropic hypogonadism (IHH)- rare genetic conditions
- Gonadotropin-releasing hormone (GnRH) deficiency
- Hypothalamic-pituitary function is otherwise normal, and hypothalamic-pituitary imaging reveals no space-occupying lesions.
- Anosmia (lack of sense of smell) or severe hyposmia is present in patients with Kallmann syndrome in contrast to idiopathic hypogonadotropic hypogonadism.
- Deficient hypothalamic GnRH secretion leads to the markedly abnormal gonadotropin secretion
- The result is hypogonadism; infertility; and absent, incomplete, or partial pubertal maturation. No periods or secondary sexual characteristics
Disorders of the Hypothalamus
- Commonest reason for hypogonadotropic secondary amenorrhoea
- Often associated with stress i.e. in migrants, young women when leaving home, university students
- Diagnosis by exclusion of pituitary lesions
- Hormone therapy or ovulation induction is not indicated unless patient wishes to become pregnant
Weight loss- amenorrhoea
- A loss of >10kg is frequently associated with amenorrhoea. Typically in young women and teenage girls
- Joggers amenorrhoea: in athletes due to redistribution between proportion of body fat mass and body muscle mass. May also be mediated by exercise related changes in beta-endorphins
- Anorexia nervosa- associated with secondary amenorrhoea
Examination of patient with amenorrhoea
- Breast development, abdominal and pelvic examination
- Presence of hirsutism, virlization
- Beta-hCG, FSH, TSH
- Prolactin, pelvic ultrasound scan
Amenorrhoea- breast absent
- Uterus absent: Gonadal agenesis in 46XY
- Gonadal failure/agenesis in 46XX
Amenorrhoea- breasts present
- Uterus absent: enzyme deficiency in testosterone synthesis, Testicular feminization, Mullerian agenesis
- Uterus present: Disruption of the hypothalamic pituitary axis. Hypothalmic, pituitary or ovarian pathogenesis. Congenital abnormalities of the genital tract
Investigations for amenorrhoea
- FSH ,LH, Prolactin level and TFT
- Karyotyping…if chromosomal. anomaly is suspected on clinical grounds
- Progesterone withdrawal test to check endogenous estrogen. if bleeding PV-reactive endometriosis. and patent outflow tract.
- USS pelvis
Amenorrhoea- karyotyping
- 46- XY: androgen insensitivity (TSF syndrome)
- 46- XX: Mullerian agenesis
Management of amenorrhoea
- Infertility-Restoration of ovulatory function
2.Estrogen deficiency -If possible HRT and prevention of osteoporosis and atherosclerosis - Endometrial hyperplasia- Progesteron for prevention of endometrial hyperplasia in patients with normal estradiol levels
- Vaginal reconstruction in vaginal agenesis
- Gonadal tumors-If there is Y chromozome gonadectomy following puberty
Most common causes of amenorrhoea
- Polycystic ovary syndrome
- Hypothalmic amenorrhoea
- Hyerprolactinaemia amenorrhoea
4.Ovarian failure