Female Pathology: Cervix Flashcards

1
Q

what is the cervix

A

neck of uterus

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2
Q

what is the cervix divided into

A

exocervix and endocervix

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3
Q

epithelium of exocervix

A

nonkeratinizing squamous epithelium

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4
Q

epithelium of endocervix

A

single layer of columnar cells

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5
Q

what is the junction between exocervix and endocervix called

A

transformation zone

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6
Q

What is HPV, what’s its most popular target

A

sexually transmitted DNA virus

- cervix in the transformation zone

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7
Q

how is HPV eradicated

A

acute inflammation

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8
Q

persistent infection of HPV leads to increase risk of what

A

cervical dysplasia ( cervical intraepithelial neoplasia ) CIN

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9
Q

What are high risk HPV types

A

16, 18, 31, 33

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10
Q

What are low risk HPV types

A

6, 11

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11
Q

high risk HPV produces what proteins which destroy what

A

E6 - destroys p 53

E7 - destroys Rb

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12
Q

histo for cervical intraepithelial neoplasia

A

koilocytic change
disordered cellular maturation
nuclear atypia
increased mitotic activity within endothelial

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13
Q

What are the different grades of cervical intraepithelial neoplasia, CIN

A

CIN I: less than 1/3 thickness of epithelium
CIN II: less than 2/3 thickness of epithelium
CIN III: slightly less than entire thickness
Carcinoma in situ: entire thickness

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14
Q

how does CIN progress

A

stepwise function to eventually become invasive squamous cell carcinoma

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15
Q

what is cervical carcinoma

A

invasive carcinoma arises from cervical epithelium

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16
Q

who usually gets cervical carcinoma

A

middle-aged women

17
Q

clinical presentation for cervical carcinoma

A

vaginal bleeding: especially postcoital bleeding

cervical discharge

18
Q

what is a key risk factor for cervical carcinoma

A

high-risk HPV infection

19
Q

what are secondary risk factors

A

smoking

immunodeficiency

20
Q

what are the most common subtypes of cervical carcinoma

A

squamous cell carcinoma

adenocarcinoma

21
Q

how can cervical carcinoma impact other organs

A
  • invade through anterior uterine wall into bladder
  • block ureters
  • hydronephrosis with postrenal failure
22
Q

what is a common cause of death for cervical carcinoma

A

postrenal failure

23
Q

what is gold standard for screening

A

pap smear

24
Q

what is the goal of screening

A

catch dysplasia (CIN) before it develops into carcinoma

25
Q

when does pap smear screening begin

A

21 years

performed every 3 years

26
Q

process of pap smear

A
  • cells are scraped from transformation zone using brush and analyzed under microscope
27
Q

under microscope what is high-grade dysplasia characterized as

A

cells with hyperchromatic (dark) nuclei

high nuclear to cytoplasmic ratios

28
Q

What happens when a patient comes back with an abnormal pap smear, what do you do next

A

confirmatory colposcopy and biopsy

29
Q

what are limitations of pap smear

A
  • inadequate sampling of transformation zone ( false negative)
  • limited efficacy in screening for adenocarcinoma
30
Q

HPV vaccines cover what strains

A

6,11,16,18

31
Q

antibodies generated by HPV vaccine protect against what depending on the strain

A

6,11: condylomas

16,18: CIN and carcinoma