Pathology Of Abnormal Uterine Bleeding Flashcards
Profuse or prolonged bleeding at the time of the period
Menorrhagia
Irregular bleeding between periods
Metrorrhagia
Menstrual cycle at intervals of less than 21 days
Polymenorrhea
Menstrual cycle length that is greater than 37 days
Oligomenorrhea
Absence of menses by 16 years of age (primary) or no menses for > 6 months (secondary)
Amenorrhea
Bleeding that happens more than 12 months after menopause
Post menopausal bleeding
What are the organic causes of abnormal uterine bleeding?
They are reproductive tract disease: (4)
- Non-neoplasticism disorders of endometrium
- Premalignant: endometrial hyperplasia
- Malignant neoplasms
- Pregnancy -related:
- Miscarriage
- Ectopic
- Trophoblast disease
What are the non-organic or dysfunctional or hormonal causes of abnormal uterine bleeding?
- Anovulatory or dysfunction ovulation
- Iatrogenic —> IUD/ Drugs
- Systemic diseases —>
A. Coagulopathy —> e.g Von willberand disease
B. Ovarian —> PCOS, functional tumors
C. Endocrine: thyroid, adrenal, pituitary
D. Metabolic: obesity
What are the causes of adolescents AUB?
- Anovulatory cycle
2. Coagulation disorders
What are the causes of postmenopausal AUB?
- Endometrial atrophy
2. Anatomical lesions (carcinoma, hyperplasia,polyps)
What are the causes of AUB according to FIGO?
They are collected with mnemonic palm Coein
P—> polyp
A—> adenomyosis
L—> leiomyosis
M—> malignancy
C—> coagulopathy
O—> ovulatory dysfunction
E—> endometrial
I—> iatrogenic (for example, an intrauterian system)
N —> not otherwise specified (for example caesarean scar defects)
What is the main cause of prepubertal AUB?
Precocious puberty (hypothalamic, pituitary , or ovarian origin)
What is the cause of AUB in perimenapausal ?
- Dysfunctional uterine bleeding
- Anovulatory cycle
- Anatomical lesions (carcinoma, hyperplasia, polyps)
What is the cause of AUB in reproductive age?
- Complications of pregnancy (abortion, trophoblastic disease, ectopic pregnancy)
- Anatomical lesions (leiomyoma, adenomyosis, polyps, endometrial hyperplasia, carcinoma)
- Dysfunctional uterine bleeding
- Anovulatory cycle
- Ovulatory dysfunctional bleeding —> e.g inadequate luteal phase)
Mention the steps that lead to bleeding in anovulatory cycles?
- Hormonal imbalances, alterations in hypothalamus-pituitary-ovarian axis
- no positive estrogen feedback —> no LH midcycle surge
- No ovulation —> no corpus luteum —> no progesterone —> no secretory changes in endometrium
- Unopposed estrogen production continues —> overgrowth of endometrium —> thickened endometrium is fragile and bleeds easily
- In absence of progesterone —> defective vasoconstriction, hypoxia response, Hemostasis, and repair
What do u see in anovulatory endometrium on biopsy?
- Stomal condensation
- Irregular proliferation
- Lack secretory changes
- Disordered proliferation endometrium
- Glands dilation
- Breakdown and hemorrhage
Is a complex endocrine disorder characterized by?
- Hyperandrogenism
- Menstrual abnormalities
- Polycystic ovaries
- Chronic anovulation
- Decreased fertility
Polycystic ovarian syndrome
What are the characteristics of polycystic ovarian syndrome?
- Hyperandrogenism
- Menstrual abnormalities
- Polycystic ovaries
- Chronic anovulation
- Decreased fertility
With what is PCOS associated?
- Obesity
- Type 2 DM
- Premature atherosclerosis
What is the cause of PCOS?
Etiology remains incompletely understood: a dysrrgulation of enzymes involved in androgen biosynthesis and excessive androgen production