Female Pathology: Cervix Flashcards
what is the cervix
neck of uterus
what is the cervix divided into
exocervix and endocervix
epithelium of exocervix
nonkeratinizing squamous epithelium
epithelium of endocervix
single layer of columnar cells
what is the junction between exocervix and endocervix called
transformation zone
What is HPV, what’s its most popular target
sexually transmitted DNA virus
- cervix in the transformation zone
how is HPV eradicated
acute inflammation
persistent infection of HPV leads to increase risk of what
cervical dysplasia ( cervical intraepithelial neoplasia ) CIN
What are high risk HPV types
16, 18, 31, 33
What are low risk HPV types
6, 11
high risk HPV produces what proteins which destroy what
E6 - destroys p 53
E7 - destroys Rb
histo for cervical intraepithelial neoplasia
koilocytic change
disordered cellular maturation
nuclear atypia
increased mitotic activity within endothelial
What are the different grades of cervical intraepithelial neoplasia, CIN
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
how does CIN progress
stepwise function to eventually become invasive squamous cell carcinoma
what is cervical carcinoma
invasive carcinoma arises from cervical epithelium