Gynaecological Cancer Flashcards
what causes 70% of cervical cancer
HPV type 16 and 18
other 30% different strains of HPV
how does HPV cause cancer
Integrate themselves in the DNA of cells (at transformational zone)
Able to produce proteins that inhibit p53 and RB1 which are tumour suppressor genes
produce E6 and E7 oncoproteins
what patients with cervical cancers are suitable for surgery
those with stage 1 cancer only- confined to the cervix- no spread or lymph involvement
why is acute renal failure a common presentation of cervical cancer
as common for it to spread here
where else can HPV cause cancers
oral pharyngeal
what are the different patient groups that get oral cancer
HPV- young
old- smoking and alcohol
what are the risk factors for cervical cancer
smoking
reduce age on onset on intercourse (exposure to HPV, immature transition zone more receptive to HPV damage)
‘high risk’ male
OCP (may just be reduced barrier contraceptive)
multiple partners (exposure to HPV)
how does cervical cancer present
screening
post coital/ intermenstrual/ post menopausal bleeding
acute renal failure (will have bilateral hydronephrosis due to renal mets)
what are the stages of cervical cancer
Stage 1a – microscopic Stage 1b visible lesion (1B1 and 1B2 depending on size of lesion) Stage 2 a – vaginal involvement 2b parametrial involvement Stage 3 lower vagina or pelvic sidewall Stage 4 bladder/rectum or metastases
what stage are the majority of cervical cancers when found
1b (visible lesion, contained within cervix)
what is the 5 year survival rates of cervical cancer 1A and IV
1A >95%
IV 20-30%
what are the treatment options for cervical cancer
surgery (only for grade 1):
- large loop excision of the transition zone (LLETZ)- forvery early cancer found on screening
- fertility sparing- trachelectomy, for small tumours confined to cervix (removal of cervix)
- wertheim (radical hysterectomy =lymphadenohysterocolpectomy = removal of cervix, proximal 1/3rd of vagina, lymph and parametrial excision)
radiotherapy
chemotherapy
what is the role of chemotherapy in cervical cancer
acts as radiotherapy sensitiser
on its own wont cure cancer
what are the forms of radiotherapy to treat cervical cancer
- external beam, targeted at tumour and modes to avoid bladder and rectum
- brachytherapy (implant applied to cervix and uetrus to give high dose of radiation, packing used to push bladder and rectum away- inverse square law = doubling the distance quarters the dose received)
how does radiotherapy affect tumour cells and not normal cells
as tumour cells less able to repair themselves in the interfractional interval
what does planning for radiotherapy involve in cervical cancer
exam under anaesthetic and marker seeds put into tumour to visualise it on imaging
CT planning
pinpoint tattoos to mark site
simulator
what are the forms of chemotherapy used to treat cervical cancer
neoadjuvant (given before radio to try and shrink tumour and reduce symptoms)
concomittant- given at same time as radio
palliative- for disease spread beyond the pelvis
what chemotherapy drugs are used in cervical cancer
cisplatin (platinum based) 40mg/m2 weekly
carboplatin/ paclitaxol
what is brachytherapy
internal radiotherpay Tx
Intrauterine tube through cervix into uterus
Ovoids (colpostats) egg shaped tubes
Ring applicator
what complication can be caused in the sigmoid colon after brachytherapy
can stenose, becomes scarred and narrowed
can develop into fistula
what is the mainstay of endometrial cancer treatment
surgery
chemo and radio therapy only used when patient inoperable (wide spread/ comorbidity)
what are the risk factors for endometrial cancer
obesity
oestrogens- HRT, tamoxifen (given to reduce the risk of breast cancer recurrence, has a slight oestrogenic receptor agonist action)
genetic- HNPCC (lynch syndrome)
what is the most common presentation of endometrial cancer
post menopausal bleeding
what is the treatment for endometrial cancer
Total abdominal hysterectomy with bilateral salpingo-oophorectomy (TAH-BSO) and peritoneal washings for cytology
lymphadenopathy- contraversial
Adjuvant Radiotherapy
Vault brachytherapy
External beam
(given to reduce relapse)
Adjuvant Chemotherapy
Depending on grade, more likely to be needed in high grades, reduces risk of relapse by about 5-10%
do more women die from cervical or ovarian cancer
ovarian
does ovarian cancer commonly spread to brain/ liver
no as ovaries and fallopian tubes with within the peritoneum so have big space to grow in
unless BRACA mutation, distant mets more likely
what are the risk factors for ovarian cancers
>50 nulliparity (or low parity) delayed pregnancy FHx of breast/ ovarian Cx BRACA 1 (40%) and BRACA 2 (18%) (most cases are sporadic)
how does ovarian cancer present
often presents late (60% late stage at diagnosis) non-specific presentation ascites/ bloating pelvic mass/ bladder dysfunction pleural effusion/shortness of breath incidental finding early satiety abdominal pain difficulty eating
what tests for: women presenting in general practice with one or more symptoms
of abdominal distension or bloating with or without abdominal pain,
feeling full quickly, difficulty eating, or urinary symptoms, of less than
12 months duration and occurring more than 12 times per month
CA125 blood serum level
urgent pelvic
ultrasound
if symptoms persist but normal Ix then refer to secondary care
what can be done phrophylatically for women predisposed to ovarian cancer
prophylactic salpingo-oophorectomy