HPV is necessary or sufficient to cause cervical cancer and dysplasia?
necessary
HPV subtypes accounting for cancer
16, 18
in addition to cervical cancers, high-risk HPV causes
HPV transmission
skin-skin contact
HPV risk fx
STI risk fx
immunosuppression
smoking
young age
HPV natural history
HPV persistent infection
- leads to invasive cervical cancer through a stepwise sequence of progressive neoplasia
It takes __ years form initial infection to develop invasive cancer
10-25
cervical cancer screening guidelines
<21 y: none
21-29: pap q3yr
30-65: pap+HPV q 5 yr
>65 y or s/p hyst: no screening (no h/o CIN 2 or >20 in past 20 yr)
colposcopy
-magnification and illumination to aid in cervix/vagina/anogenital area
cervical cancer classification
CIN 1/2/3
CIN 1 recommendation
co-test in 1 year
CIN 2 recommendation
ev 6 mo colpo + pap, or treat
CIN 3 recommendation
treat
tx of CIN 2/3
excisional
cold-knife cone biopsy
large area of tissue around cervix is excised for examinatino
LEEP
uses electrical current to excise the distal cervix including the transformation zone
Invasive cervical cancer
Invasive cervical cancer natural hx
Invasive cervical cancer - early stage disease
tx
radical hysterectomy
chemoradiation therapy
Invasive cervical cancer - advanced stage disease
chemoradiation therapy
5-yr survival of stage Ia cervical cancer
95%
HPV vaccine
L1 capsid HPV viral protein
reduces risk up to 97% for 7 types of high-risk HPV including HPV 16/18 and 6/11 (genital warts)
carcinoma of the cervix usually begins at the junction of the
ectocervix and endocervix