Cancer Flashcards
After how long does HRT increase the risk of ovarian cancer
5 years
What type of gynaecological cancer may present with bloating, urinary frequency and urgency
Ovarian
What is the gold standard investigation to diagnose endometrial cancer?
Hysteroscopy with biopsy
What dermatological condition increases the risk of vuval cancer?
Lichen sclerosis
Tumour marker for ovarian cancer?
Cancer antigen 125
Raised B HCG and AFP suggest what in the context of gynaecological malignancy
Germ cell type ovarian cancer
Where does vulval cancer most commonly present r
Labia majora
What extend of cervical dyskaryosis should be referred for colposcopy, without waiting for HPV testing on the cervical sample?
Moderate to severe
Cervical smears should be delayed until how long after birth, miscarriages and terminations.
3 months
What differential can mimic ovarian cancer, causing abdominal discomfort, IMB and raised Ca-125
PID
How does ovarian cancer spread?
Ovarian cancer initially spreads by local invasion
Risk malignancy index (RMI) prognosis in ovarian cancer is based on what?
US findings
CA 125
Menopausal status
Risk factors for endometrial cancer
obesity
nulliparity
early menarche
late menopause
unopposed oestrogen. The addition of a progestogen to oestrogen reduces this risk (e.g. In HRT).
The BNF states that the additional risk is eliminated if a progestogen is given continuously
diabetes mellitus
tamoxifen
polycystic ovarian syndrome
hereditary non-polyposis colorectal carcinoma
Unfortunately, the uptake of cervical screening amongst lesbian women is around 10 times worse than the general female population, sometimes as a consequence of incorrect advice from healthcare professionals. Why do women who have only ever had sexual relations with women still require cervical smears?
HPV, the causative agent of cervical cancer, can be transmitted during genital contact or oral sex. Lesbian and bisexual women should therefore have cervical screening as normal.
Who is offered cervical screening in England and how often?
25-49 years: 3-yearly screening
50-64 years: 5-yearly screening
cervical screening cannot be offered to women over 64 (unlike breast screening, where patients can self-refer once past screening age)
When does the NHS advise the best time to take a cervical smear is?
Mid cycle
When may a women want to opt out of cervical screening?
If she has never been sexually active (including oral sex)
Cervical cancer screening: if sample is hrHPV +ve + cytologically abnormal, what should be done?
colposcopy
‘M rules’ for ovarian cysts
M rules - cyst is likely malignant and requires biopsy:
Irregular, solid tumour.
Ascites.
At least 4 papillary structures.
Irregular multilocular solid tumour with largest diameter ≥100 mm.
Very strong blood flow.
The first step in the investigation of possible endometrial cancer is what?
The first step in the investigation of possible endometrial cancer is to perform a trans-vaginal ultrasound scan to measure the endometrial thickness
What are the common types of cervical cancer?
80% of cervical cancers are squamous cell carcinoma.
Adenocarcinoma is the next most common type.
Very rarely there are other types, such as small cell cancer.
What virus is commonly associated with cervical cancer?
Cervical cancer is strongly associated with human papillomavirus. Children aged 12 – 13 years are vaccinated against certain strains of HPV to reduce the risk of cervical cancer.
Types 16 and 18 responsible for 70% - these are covered by vaccine
What cancers can HPV cause?
The most common cause of cervical cancer is infection with human papillomavirus (HPV).
HPV is also associated with anal, vulval, vaginal, penis, mouth and throat cancers. HPV is primarily a sexually transmitted infection.
How does HPV cause cervical cancer?
P53 and pRb are tumour suppressor genes inhibited by proteins produced by HPV, therefore promoting the development of cancer
Which proteins does HPV produce and which gene do they suppress?
E6 protein inhibits p53
E7 protein inhibits pRb
Risk factors for cervical cancer
Increased risk of catching HPV
Later detection of precancerous and cancerous changes (non-engagement with screening)
Other risk factors:
Smoking
HIV (patients with HIV are offered yearly smear tests)
Combined contraceptive pill use for more than five years
Increased number of full-term pregnancies
Family history
Exposure to diethylstilbestrol during fetal development (this was previously used to prevent miscarriages before 1971)
Factors associated with increased risk of catching HPV?
Early sexual activity
Increased number of sexual partners
Sexual partners who have had more partners
Not using condoms
Presentation of cervical cancer
Cervical cancer may be detected during cervical smears in otherwise asymptomatic women.
The presenting symptoms that should make you consider cervical cancer as a differential are:
Abnormal vaginal bleeding (intermenstrual, postcoital or post-menopausal bleeding)
Vaginal discharge
Pelvic pain
Dyspareunia (pain or discomfort with sex)
Where there is an abnormal appearance of the cervix suggestive of cancer, an urgent cancer referral for colposcopy should be made to assess further.
What appearances that may suggest cervical cancer?
Ulceration
Inflammation
Bleeding
Visible tumour
Colposcopy vs smear test description of abnormalities
Colposcopy- dysplasia
Smear test cytology - dyskaryosis
Where is CIN diagnosed?
Colposcopy
CIN I
mild dysplasia
affecting 1/3 the thickness of the epithelial layer
likely to return to normal without treatment
CIN II
moderate dysplasia
affecting 2/3 the thickness of the epithelial layer
likely to progress to cancer if untreated
CIN III
severe dysplasia, very likely to progress to cancer if untreated
What CIN stage is sometimes called cervical carcinoma in situ
CIN III is sometimes called cervical carcinoma in situ
What does a cervical smear consist of?
The test consists of a speculum examination and collection of cells from the cervix using a small brush.
The cells are deposited from the brush into a preservation fluid.
This fluid is transported to a lab where the cells are examined under a microscope for precancerous changes (dyskaryosis).
This way of transporting the cells is called liquid-based cytology.
Cytology is only performed when smear is positive for HPV
Notable exceptions to routine cervical screening program?
Women with HIV are screened annually
Women over 65 may request a smear if they have not had one since aged 50
Women with previous CIN may require additional tests (e.g. test of cure after treatment)
Certain groups of immunocompromised women may have additional screening (e.g. women on dialysis, cytotoxic drugs or undergoing an organ transplant)
Pregnant women due a routine smear should wait until 12 weeks post-partum
Possible Cytology results following a cervical smear?
Inadequate
Normal
Borderline changes
Low-grade dyskaryosis
High-grade dyskaryosis (moderate)
High-grade dyskaryosis (severe)
Possible invasive squamous cell carcinoma
Possible glandular neoplasia
What infections may be reported in a smear result?
HPV
Infections such as bacterial vaginosis, candidiasis and trichomoniasis may be identified and reported on the smear result.
Management of smear results based on PHE guidelines?
Inadequate sample – repeat the smear after at least three months
HPV negative – continue routine screening
HPV positive with normal cytology – repeat the HPV test after 12 months
HPV positive with abnormal cytology – refer for colposcopy
What does colposcopy involve?
A specialist performs colposcopy. It involves inserting a speculum and using equipment (a colposcope) to magnify the cervix. This allows the epithelial lining of the cervix to be examined in detail. During colposcopy, stains such as acetic acid and iodine solution can be used to differentiate abnormal areas.
Acetic acid causes abnormal cells to appear white. This appearance is described as acetowhite. This occurs in cells with an increased nuclear to cytoplasmic ratio (more nuclear material), such as cervical intraepithelial neoplasia and cervical cancer cells.
Schiller’s iodine test involves using an iodine solution to stain the cells of the cervix. Iodine will stain healthy cells a brown colour. Abnormal areas will not stain.
A punch biopsy or large loop excision of the transformational zone can be performed during the colposcopy procedure to get a tissue sample.
What is an LLETZ and what does it involve?
A large loop excision of the transformation zone (LLETZ) procedure is also called a loop biopsy. It can be performed with a local anaesthetic during a colposcopy procedure.
It involves using a loop of wire with electrical current (diathermy) to remove abnormal epithelial tissue on the cervix.
The electrical current cauterises the tissue and stops bleeding.
What should you advise women undergoing a LLETZ?
Bleeding and abnormal discharge can occur for several weeks following a LLETZ procedure. This varies between women.
Intercourse and tampon use should be avoided after the procedure to reduce the risk of infection.
Depending on the depth of the tissue removed from the cervix, the procedure may increase the risk of preterm labour.
What is a cone biopsy and when is it used in cervical cancer/CIN?
A cone biopsy is a treatment for cervical intraepithelial neoplasia (CIN) and very early-stage cervical cancer.
It involves a general anaesthetic.
The surgeon removes a cone-shaped piece of the cervix using a scalpel.
This sample is sent for histology to assess for malignancy.
What are the main risks of a cone biopsy?
Pain
Bleeding
Infection
Scar formation with stenosis of the cervix
Increased risk of miscarriage and premature labour
What staging system is used to grade cervical cancer?
FIGO, stages 1-4
(FIGO: Federation of Gynaecology and Obstetrics)
FIGO stage 1 cervical cancer
Cervical cancer confined to the cervix
FIGO stage 2 cervical cancer
Cervical cancer invading the uterus or upper 2/3 of vagina
FIGO stage 3 cervical cancer
Cervical cancer invading the pelvic wall or lower 1/3 of the vagina
Management of Cervical intraepithelial neoplasia and early-stage 1A cervical cancer?
LLETZ or cone biopsy
Management of cervical cancer Stage 1B – 2A
Radical hysterectomy and removal of local lymph nodes with chemotherapy and radiotherapy
Management of stage 2B-4A cervical cancer?
Chemotherapy and radiotherapy