Endometriosis Flashcards

1
Q

what is endometriosis?

A

a chronic condition characterized by the growth of hormone responsive endometrial tissue outside the uterine cavity

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2
Q

where are ectopic endometriosis implants typically found?

A

typically found on the peritoneal surface, within the ovary or invading the recto vaginal septum. however, many examples of more widely distributed lesions have been described.

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3
Q

how prevalent is endometriosis and its symptoms?

A

among reproductive age people, around 10% (190 million)
disease is accompanied by pelvic pain or infertility in up to 90 million people
symptoms are associated with work absenteeism, social isolation and high therapy costs

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4
Q

what is the objective of the “ask me about my uterus” book?

A

it insists doctors take women’s pain seriously

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5
Q

how does endometriosis affect the experience of menstrual pain?

A

many people experience cramps, but those with endometriosis describe much worse menstrual pain.
they report the pain increases over time, but severity of pain isn’t necessarily a reliable indicator of the extent of the condition. some people report no pain, some report a lot.

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6
Q

what are some common signs and symptoms of endometriosis

A

-painful periods (dysmenorrhea): pelvic pain and cramping can begin before a period and extend several days. there can be lower back and abdominal pain.
-pain with intercourse: during or after sex is common
-pain with bowel movements or urination: most likely to experience during a period
-excessive bleeding: occasional heavy periods (menorrhagia) or bleeding between periods (mentometrorrhagia)
-infertility: endometriosis is first diagnosed in some people who are seeking treatment for infertility
-other symptoms: the experience of fatigue, diarrhea, constipation, bloating or nausea, especially during menstrual periods

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7
Q

where is endometriosis located?

A

ovaries
fallopian tubes
ligaments that support uterus (uterosacral ligaments)
posterior cul-de-sac, ie the space between the uterus and rectum
outer surface of uterus
lining of the pelvic cavity
and more

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8
Q

where else can endometrial tissue be found?

A

intestines
rectum
bladder
vagina
cervix
vulva

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9
Q

how is endometriosis diagnosed?

A

direct visualization of the endometriosis implants is standard for diagnosis.
- superficial lesions on peritoneal or ovarian surfaces
- pigmented lesions appear dark blue or brown due to haemosiderin content, and non pigmented lesions are usually white in colour and may show vesicular or fibrotic appearances

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10
Q

what is haemosidren

A

when red blood cells break down and start to release iron

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11
Q

what is a vesicle

A

small fluid filled sac in the body

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12
Q

what does fibrotic mean

A

the formation of an abnormal amount of fibrous tissue

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13
Q

what is laparoscopy?

A

a small telescope (laparoscope) is inserted into the abdomen to look directly at the internal tissue
laparoscopies are always carried out under general anesthetic
during a laparoscopy, various procedures can be performed in order to destroy or remove the endometriosis, endometriotic cysts and release scar tissue (adhesions)

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14
Q

how are lesions clinically classified?

A

classically, it is taught that endometriosis implants are blue-black “powder burns” or “mulberry lesions”
in recent years, several stages of implant development have been appreciated, each with a corresponding appearance.
early, active lesions can appear as popular excrescences (solid mass) or vesicles, and can range in colour from clear to bright red
1/3 of lesions are in phase with eutopic endometrium, and have a tendency to spontaneously grow and regress
this characteristic suggests a fluctuating proliferation in association with hormone production during the menstrual cycle

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15
Q

what are endometriomas?

A

cysts that form in the ovaries, with the same kind of tissue that grows in the uterus (endometrium)
these cysts fill with blood as they grow, which turns into dark brown fluid.
endometriomas sometimes called “chocolate cysts”
cause pain, discomfort, and scarring + damage to ovaries.

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16
Q

what are the 4 stages of endometriosis? what are they based on?

A

based on the location, amount, depth and size of the endometrial implants.
Stage I- minimal
Stage II- mild
Stage III- moderate
Stage IV- severe
Criteria:
- extent of spread of implants
- involvement of pelvic structures in disease
- extent of pelvic adhesions
- blockage of fallopian tubes

17
Q

retrograde or reflux menstruation origins

A

1920s: while performing laparotomy during patient’s menses, surgeon observed free flow of blood and shed endometrial tissue from fallopian tubes into peritoneal cavity
animal model: occurs in baboons when cervical occlusion is performed to prevent antegrade flow

18
Q

retrograde or reflux menstruation and endometriosis

A

most accepted theory
endometriosis derives from reflux of endometrial fragments regurgitated through the fallopian tubes during menstruation with subsequent implantation on peritoneum and ovary

endometrial cells in menstrual fluid reach peritoneal cavity, and due to inflammatory immune cells, begin to adhere to tissues. then they begin to grow. this leads to angiogenesis and antiapoptosis (formation of scar tissue). these release prostaglandins and estradiol, leading to fibrosis scarring pain.

retrograde menstruation, attachment, proliferation, migration, neovascularization, inflammation, fibrosis

19
Q

prostaglandins and endometriosis

A

1930s: gynaecologists found that semen contains a substance that causes contraction of uterus
this substance was fat soluble, and named prostaglandin, since it was thought to be secreted by prostate gland.
seminal vesicles are major source of prostaglandins, but they are produced in every tissue in the body.
prostaglandins are made at sites of tissue damage or infection, where they cause inflammation, pain and fever as part of the healing process.

20
Q

parts of the human sperm going head to tip

A

acrosome
nucleus
midpiece
flagellum

21
Q

components of seminal plasma

A

fructose
pH buffers
fibrinogen and semenogelin (proteins)
calcium binder (citric acid)
enzymes from prostate
antioxidants (ascorbic acid)
viruses
zinc ions

22
Q

which glands contribute to semen?

A

seminal vesicle (70%, fructose and fibrinogen)
prostate gland (30%, citric acid and enzymes)
bulbourethral gland (mucus)
testis (1%, sperm)
epididymis (inositol, and chlorine substance to remove water)

23
Q

coelomic metaplasia

A

metaplasia: committed cell type (mesothelium) trans differentiate into another cell type (endometrial epithelium)
pretty much, a certain cell differentiates into endometrial tissue
contemporary view: reprogramming of mesenchymal stem cells may be involved.

24
Q

two clinical examples of metaplasia:

A

barrett’s esophagus where bile acids transform stratified squamous esophageal cells into mucin containing goblet cells
lung, columnar tracheobronchial epithelium can be induced by cigarette smoke to undergo squamous differentiation.

25
Q

lymph and vascular metastasis endometriosis theory

A

endometriosis has been identified in sites distant from the pelvis, even in the nose and lungs.
theory hypothesizes that menstrual tissue travels from endometrial cavity to lymph nodes and from there through lymphatic channels and veins to distant sites

26
Q

3 theories for endometriosis

A

retrograde menstruation theory (menstrual tissue travels outwards and adheres to tissue)
metaplasia: other tissues differentiate into endometrial tissue
lymph and vascular: menstrual tissue travels through lymph vessels to distant parts of body

27
Q

pathophysiology of pain in endometriosis, with retrograde theory?

A

transplanted endometrial tissue and cells attach to peritoneal surfaces, establish blood supply, and invade nearby structures. infiltrated by sensory, sympathetic, parasympathetic nerves and elicit an inflammatory response.

implants secrete estradiol and prostaglandin E2, which attract macrophages, neurotrophic peptides, enzymes for tissue remodelling, tissue inhibitors, and proangiogenic substances

28
Q

how does CYP19 (P450 aromatase) expression change in ovarian endometriosis forms?

A

highest in ovarian
mid in peritoneal
low in deep endometriotic nodules

29
Q

what would nonsteroidal anti inflammatory drugs be prescribed for

A

dysmenorrhea

30
Q

what would oral contraceptives be prescripted for, in endometriosis

A

dysmenorrhea

31
Q

what would aromatase inhibitors be prescribed for?

A

dysmenorrhea, chronic pelvic pain.
be cautious of hypoestrogenism

32
Q

what would GnRH agonists be prescribed for

A

dysmenorrhea, chronic pelvic pain. be cautious for hypoestrogenism