Neoplastic Pathology of the female Reproductive Tract and PATHOMA FEMALE GENITAL SYSTEM Flashcards
Human Papilloma Virus is what type of virus?
DNA
Low risk HPV
6, 11 (episomal DNA)
High Risk HPV
16,18,31, 33 ( genomically integrated viral DNA, Expression of viral oncogenes)
High Risk HPV associated with what two harmful genes?
E6 and E7
E6 gene product does what that is bad?
Binds to and causes degeneration of p53 tumor suppressor
E7 does what that is bad?
binds to and inactivates Rb gene which then allows upregulation of Cyclin E and p16INK4… KNOW…Cyclin E and P16INK4 are proliferation promoters
HPV nearly always affects what area of the cervix?
Transformation zone
What even is the transformation zone
It is the area where exocervix joins endocervix. Exocervix consists mostly of squamous epithelium whereas endocervix is columnar cells. The transformation zone exists between these layers and is most commonly affected by HPV
CIN
Cervical Intraepithelial Neoplasia
CIN is characterized by?
KOILOCYTIC change, disordered maturation, nuclear atypia, increased mitotic activity…pretty much all of that is pretty routine for neoplasia except maybe the koilocytic change
CIN 1
less than 1/3 of the thickness of the epithlium is involved. Koilocytes near the top
CINII
less than 2/3 the thickness of the epithelium
CIN III
Just barely less than the entire thickness
What is koilocytic change?
Raisinoid nuclei
- You see large cytoplasm (cytomegaly) the virus particles live here, large nucles (nucleomegaly), perinuclear halo, irregular nuclear membrane (raisin appearance), stippled coarse chromatin, increased mitotic activity as well
What are the most common subtypes of cervical carcinoma
Squamous cell (80%) and adenocarcinoma (15%)…both related to HPV