Gynaecology and Oncology screening Flashcards
What is the order of most common gynae cancers in the world?
- Endometrial cancer is most common gynae cancer in the devleoped world
- incidence risen in last 20 years by 40% - with obesity
- presents early: peak 65-75yrs
- cervical cancer is the 3rd most common cancer worldwide, and THE most common in woman <35y/o
- 50% cases are <47 y/o
- peak = 25-29yrs
- ovarian cancer is the leading cause of death from gynae malignancy in the uk. 50% of cases are over 65 (but half are under 65?)
- poor prognosis as late presenting (30% 5 year survival, all statges)
A patient with PMHx cervical glandular intraepithelial neoplasia can develop what type of cervical cancer?
- ADENOCARCINOMA e.g. as glandular intraepithelial neoplasia –> from endocervical e.g. ectropion
- high risk HPV is also important
- adeno carcinomas = 15% cervical cancers (mixed = 15%; SCC = 70%)
A patient has a suspicious cervical lesion which is biopsied and sent for histology. On histology keratin pearls are seen.
What is this indicative of?
Squamous Cell Carcinoma (70% of cervical cancer)
- progression from CIN (CERVICAL intraepithelial neoplasia) - occurs over 10-20yrs
- (not all cases of CIN progress to cancer)
A patient presents with post-coital bleeding. What is the causative agent you most want to rule out?
HPV - post coital bleeding is cervical cancer until proven otherwise. (even if STIs is probably more common).
99.7% of cancerous cells contiain HPV DNA; most infections of HPV clear within 2 years but persistent cases can cause malignant chagnes
Which HPV are low risk and cause genital warts?
HPV 6 &11
Which HPV are high risk and can cause cervical cancer (although most infections clear within 2 years, but persistent cases can cause malignant changes)?
HPV 16, 18 & 33
HPV16 –> E6 gene –> inhibits P53 tumour supressor
HPV 1–> E7 gene –> inhibits RB supressor gene
What type of cancer is endometrial and what is its precancerous state?
endometrial cancer = andenocarcinoma (e.g. ectroption is this too as its the glandular tissue coming out)
the pre-cancerous state = endometrial hyperplasia = increase in number of endometrial glands relative to stroma
the pre-cancerous state = endometrial hyperplasia = increase in number of endometrial glands relative to stroma
What hormone causes the endometrial glands to grow and so what RFs are there for endometrial cancer?
Stimulation of the endometrium by unopposed oestrogen (e.g. in the follicular phase)
TF RFs:
- early menarche, late menopause - at extremes of menstrual age cycles inc. likely to be anovulatory
-
anovulation (as P produced by CL after ovulation
- low parity (foetus >24w)
- PCOS
-
oestrogen
- HRT with oestrogen only
- tamoxifen - selective oest receptor modulator; antagonist in breast, agonist in endometrium)
What staging system is used for gynae cancers?
FIGO!
A patient has cervical cancer (SCC, 70% w/keratin pearls seen on histology, progressed from CIN) that is seen beyond the cervix but nor on the pelvic sidewall or lower 1/3 vagina. There is parametrial involvement (located near the uterus).
What FIGO stage is this?
Stage 2 B - 2A would be no parametrial involvement
the figo staging for cervical cancer starts at stage 0 = carcinoma in situ (CIS), S1 = confined to cervix A)microscopically, B) gross lesions, clinically identifiable
Stage 3 = extends to pelvic sidewall/lower 1/3 of vagina or hydronephrosis not explained by anther case; A) no extension to sidewall, B) extension to sidewall and/or hydronephrosis
S4 = extends to bladder or rectum of mets, A) Bladder/rectum B) Distant organs
A patient has cervical cancer that affect the lower 1/3rd of the vagina but no extension to the pelvic sidewall.
What FIGO stage is this cervical cancer?
FIGO stage 3 A of cervical cancer =>
Stage 3 – extends to pelvic sidewall or lower 1/3rd vagina or hydronephrosis not explained by another case, A) no extension to sidewall, B) extension to sidewall and/or hydronephrosis
(S0 = CIS, S1A = microscopic cervical cancer confined to cervix, S1B = gross lesions, clinically identifiable, S2 = beyond cervix a = no parametrial involvement, B = yes parametrial involvement (near uterus), S4 = extends to bladder or rectum or mets A)bladder/rectum B) = DISTANT)
What are the risk factors for cervical cancers?
- Risk factors –
- HPV infection
- Smoking
- Other STIs (early first intercourse, many sexual partners)
- Long-term (>8yrs) COCP
- Immunodeficiency e.g. HIV
- Age 30-5Oyrs
- High parity
- Protective factors –
- HPV vaccination programme (HPV6,11,16,18)
A patient has presented with post-coital bleeding, what are the differentials?
Post coital bleeding
- cervical cancer
- endometrial cancer (post-menopausal population)
- STI,
- cervical ectropion,
- polyp,
- fibroids,
- pregnancy-related bleeding
A patient has presented with post-coital bleeding, what other symptoms may you want to ask about?
Post-coital bleeding = cervical cancer until proven otherwise (even if STIs probably more common)
- Abnormal PV bleeding
- – PCB, IMB, PMB
- Vaginal discharge
- – blood-stained, foul smelling
- Pelvic pain, dyspareunia (late sign)
- Advanced (signs invasion)
- – weight loss, oedema, loin pain, rectal bleeding, radiculopathy (pinched nerve), haematuria
What is the difference in investigation for pre-menopausal and post-menopausal women in whom you suspect cervical cancer?
- for both you do a speculum
- (bleeding, discharge, ulceration),
- bimanual
- (mass?),
- GI
- (hydronephrosis, hepatomegaly, rectal bleeding, mass on PR)
-
Pre-menopausal –
- test for chlamydia trachomatis first, if –ve, –> colposcopy & biopsy (grade)
-
Post-menopausal –
- urgent colposcopy & biopsy
What agents are used in colposcopy to highlight abnormal tissue?
Iodine or acetic acid
highlights abnormal tissue “aceto-white”
a patient has aceto-white abnormal cervical tissue highlighted - what other ix than colposcopy needs to be done now?
- Basic bloods,
- CT Chest Abdo Pelvis (?mets)
- MRI/PET (uses glucose to see metabolically active areas) (stage)
- +/- examination under anaesthesia with further biopsies
A patient had a cervical cancer confirmed microscopically on biopsy but there were no gross lesions and it was confined to the cervix. What is the Rx?
This is a figo stage 1A lesion (if grossly identifiable then would be figo stage 1B)
TF the Rx of stage 1a cervical cancer =
- Radical trachelectomy removing cervix & upper vagina to preserve fertility (stage 1a)
*
A patient is has cervical cancer confiemed that has spread beyond the cervic but not pelvic sidewall or lower 1/3 vaginia, there is no parametrial involvement (the parametirum is the fibrous and fatty tissue surrounding the uterus).
What is the managment of this cancer?
this is stage 2a (stage 1a would be gross lesions on the cervix)
Rx: radical hysterectomy as its curative removing uterus, vagina and parametrial trissues to pelvic sidewall + lymphadenopathy (stage 1b/2a)
A patient has cervical cancer that extends to the bladder or rectum (found on CT CAP)
What is the Rx for this?
this is stage 4 - extends to bladder/rectum (A) and 4B if it has metastasised to distant organs
Rx: anterior/posterior/total pelvic exenteration
–> removing all pelvic adnexae plus bladder and/or bowel (stage 4A or recurrent)
What therapy can be used for SCC/adeno/mixed in frail elderly where surgery is unsuitable?
Hormonal progestogen therapy
What kind of chemotherapy base is used for cervical cancer?
cisplatin-based
Can be used BEFORE or AFTER surgery/radiotherapy;
cisplatin based chemotherapy is the mainstay of palliative treatment
What follow up is needed following cervical cancer?
4 monthly after treatment for 2 years
then after 2 years…
6-12 monthly for the next 3 years
What type if carcinoma is most likely for cervical, endometrial and ovarian cancer?
Cervical = SCC (70%),
endometrial = adenocarcinoma
ovarian = epithelial/adenocarcinoma
Endometrial cancer is commonly adenocarcinoma on histology, what is the pre-cancerous state?
Endometrial hyperplasia –> endometrial adenocarcinoma
e.g. increase in the number of endometrial glands relative to stroma
The most common histology of cervical cancer is SCC (70%)
What is the precursor?
Cervical intraepithelial neoplasia - CIN
What is the aetiology of endometrial adenocarcinoma?
the stimulation of the endometrium by unopposed oestrogen
A patient presents with endometrial cancer (adenocarcinoma) which is in the myometrium but not cervix/beyond the uterus.
What FIGO Staging is this?
this is figo stage 1B -
carcinoma confined to body of uterus, A) endometrium, B) myometrium
S2 = extends to cevix but not beyond uterus, S3 = extends beyond uterus but confined to pelvis A) ovary, B vagina C lymph nodes. S4 = bladder or bowel or has metastasises to distant sites.
A patient presents with endometrial cancer that had extened beyond the uterus and is confined to the pelvis, it has invaded into the vagina?
What figo stage is this?
NB: figo staging goes from stage 1 - 4 in both cervical and endometrial cancer
this is figo stage 3 B - cancer extends beyond uterus but confined to pelvis A) ovary, B vagina C lymph nodes.
S1B = carcinoma confined to body of uterus, A) endometrium, B) myometrium; S2 = extends to cevix but not beyond uterus; S4; bladder or bowel or has metastasises to distant sites.
What are the risk factors for endometrial cancer?
-
oestrogen
- oestrogen only HRT
- tamoxifen - selective oestrogen receptor modulateor - SERM ; antagonist in breast, agonist in endometrium
-
anovulation (progesterone is produced by CL after ovulation - e.g. OPPOSES oestrogen)
- e.g. early menarche, late menopause
- BECAUSE at extremes of menstural age cycles are MORE likely to be anovulatory
- low parity (not carried pregnancies to viable gestational age
- e.g. early menarche, late menopause
- age >50yrs
- obesity - peripheral aromatisation of androgens e.g. increased oestrogen
- diabetes, hypertension
- genetics - HNPCC/lynch (so inc endometrial, CRC and ovarian also)