GI, breast and lung Flashcards
What types of cancer are breast cancer?
- 95% adenocarcioma
- these are divided into invasive and insitu
- can be lobular or ductal
- other types inc tubualr, papillary, mucinous
What is DCIS?
- ductal carcinoma in situ
- neoplastic cells limited to ducts and lobules by basement membrane- myoepithelial cells preserved
- cannot met and kill pt
- can transform to become invasive (esp if high grade) so usually removed
What is pagets disease of the breast?
The neoplastic cells can extend to the nipple without crossing the BM, and cause unilateral, red, crusting of the nipple. It is often mistaken for eczema
Is lobular carcinoma in situ concerning?
- no, not considered cancerous
What type of breast cancer is often underestimated on initial imaging?
- invasive lobular adenocarcinoma
- if biopsy confirms this type, an MRI is done for accurate sizing
- tend to be more aggressive
give 8 RFs for breast cancer
- gender (female)
- age 50+
- uninterrupted menses// no pregnancy
- late menopause
- late age of 1st pregnancy
- never breast feeding
- obesity and high fat diet
- exogenous oestrogens (HRT, some debate about long term COCP use)
- geography (affluent countries)
- atypical changes (ductal or lobar hyperplasia) on previous biopsy and previous breast cancer
- radiation exposure
- BRCA1 and 2 mutations
- FHx
Describe the possible clinical features of breast cancer
- Hard, craggy, fixed, non tender palpable masses are most worrying
- But any palpable mass could be cancer
- Mammogram abnormalities
- Nipple discharge (esp if bloody or serous and spontaneous and unilateral)
- Breast pain
- Redness or pitting of skin over breast
- Nipple changes such as inversion
- Change in contours of the breast
Give 3 non cancerous differentials for breast cancer and the age each most commonly occurs
- fibroadenoma (if age <30)
- fibrocystic change (age 20-60)
- cysts (age 40-60)
What are the 2WW refferal criteria for breast cancer
- any unexplained breast lump with or without pain if age >30
- unilateral discharge, retraction or other nipple changes in woman >50
- age >30 and unexplained axillary lump
- any skin changes suggestive of cancer
- non urgent referral if under 30 and unexplained breast lump with or without pain
Describe the triple assessment of breast lumps
- history and examination
- radiography (bilateral mammography and USS of breast and regional LNs)
- Biospy (USS guided core needle or open for non palpable lesions, excision biopsy or incisional biopsy (when >4cm) if palpable, rarely FNA as no receptor status or grade
Describe the staging investigations for cancers picked up on triple assessment (7) and when is it done?)
- MRI if dense breast, lobular carcinomas and for high risk screening
- Full staging only done where chemo is an option and when higher risk/ suspicion of mets
- ER and progesterone receptor status using monoclonal antibody assay
- epidermal GF and HER2 receptor status
- LFTs and other routine bloods
- CXR for lung mets
- CT if mets suspected (abnormal CXR, neuro symptoms, hepatosplenomegaly, lymphadenopathy, LFT derangement)
- bone scintigraphy if distant mets, bone pain, LN mets
- PET scan if distant mets suspected (often fails to detect mets <5mm)
name and describe the staging system for breast cancer
bloom richardson staging
EARLY: T1-2= up to 5cm, N0 or N1 (up to 3 nodes)
LOCALLY ADVANCED= T3= >5 cm or T4= fixed to skin or chest wall, N2= 4 or more nodes, or fixed nodes or N3= nodes other than in axilla
METASTATIC= M1 (mets)
What prognostic indicators are there for breast cancer?
- blood richardson stage
- axillary node status
- tumour size
- tumour grade
- lymphatic or vacular grade
- pt age and BMI
- ER and PR status are weak prognostic factors
- oncotype dx: microarray to look at 21 genes gives indicator of chance of re- occurrence after mastectomy and guides decision to give chemo
- PREDICT tool online, NPI (cancer size x 0.2 + grade + node stage)
Where does breast cancer spread to and how?
Lymph node- to axially nodes
Blood- to bone, liver and lung commonly but can go anywhere
Directly- into chest wall and skin
What surgeries are available for breast cancer and how is the type used chosen?
- mastectomy or wide local excision
- type depends on pt choice, size of tumour relative to breast, number of nodes, site of tumours
How are lobar carcinomas in situ managed?
- usually picked up incidentally on biopsies as usually asymptomatic and doesnt cause micro-calcifications visible on mammogram
- usually only monitored and bilateral prophylactic mastectomy offered if BRAC1 or 2 +ve
How are DCIS managed?
mastectomy or wide local excision then radiotherapy
What is sentinel node biopsy?
Dye injected to breast, first node it drains to is taken
Other option is node sampling where you remove 4-5 node randomly for testing. You then do axillary node clearance if they’re involved.
When is radiotherapy used in breast cancer?
- always after wide local excision (given to breast)
- given to chest wall after mastectomy if poor prognostic group
Give 3 side effects of radiotherapy for breast cancer
skin reaction, chest wall pain and fatigue acutely.
fibrosis, atrophy of breast and telangiectasia later. Brachial plexopathy is rare now
When is chemotherapy given to breast cancer pts
- Sometimes before surgery to shrink
- After surgery if high risk invasive cancers to reduce reoccurrence risk
What chemo regime is used for breast cancer
FEC- T
5FU, epirubicin, cyclophosphamide +/- docetaxel
(probs dont need to know this)
What drug is given to a HER2 +ve breast cancer
Herceptin- particularly effective and given for 1 yr
Name an aromatase inhibitor and state how they work
Anastrozole, letrozole
Inhibits aromatase so and so production of oestrogen in peripheral fat
How does tamoxifen work
Selectively blocks oestrogen (SERM) in breast tissue but increases oestrogens effect in bones, endometrium and blood (so prothombotic)
When are aromatase inhibitors used over tamoxifen and what are the risks and benefits of each?
Aromatase inhibitors used in post menopausal women, lower risk of DVT but higher risk of osteoporosis so bone protection is given with it.
Tamoxifen used in pre and post menopausal women, less expensive but slightly less effective. It increases DVT and endometrial ca risk but is bone protective.
how long are oestrogen therapies given for in breast cancer
5-10 years
Describe the screening programme for breast ca?
- 2 view mammograms every 3 years for women age 47-73
What types of lung cancer are there and which are most/ least common?
Small cell carcinoma- 12% (from neuroendocrine tissue)
Non small cell carcinoma
- squamous cell (40%)
- adenocarcinoma (35%)
- large cell (5%)
The remaining 5% are rarer tumours like carcinoid tumours
Give 5 RFs for lung cancer
- smoking
- airflow obstruction
- increasing age
- FHx
- exposure to carcinogens like asbestos
Describe the clinical features of lung cancer caused by the primary tumour
- Cough (lasting >3 weeks)
- SOB
- Haemoptysis
- Wheeze
- SVC obstruction (SOB, distended neck veins and JVP, headache/ fullness, blurred vision, odema arms/ face, confusion, syncope)
- Persistent/ recurrent infections
Describe the clinical features of lung cancer caused by mets
- Fatigue
- Weight loss
- Night sweats
- Lymph node enlargement (supraclavicular)
- Liver mets- anorexia, mass, jaundice, abdo pain, ascites
- Adrenals- addisons (bronze pigment, hypoglycaemia, postural hypotension, weight loss, GI disturbance, weakness, crises)
- Bone- pathological fractures, bone pain
- Pleura- effusions
- CNS- cord compression, focal neurological signs
Describe the possible clinical features of lung cancer caused by paraneoplastic syndromes
- Horners syndrome (partial ptosis, unilateral anhidrosis, miosis)
- Clubbing
- Hypercalcaemia
- Anaemia
- SIADH
- Cushings
- Lambert eaton myasthenic syndrome (muscle weakness, fatigue, pain, reduced reflexes, walking difficulty, speech impairment and swallowing problems)
- VTE
- Thrombocytosis
Describe the referral criteria for lung cancer
- age >40 w/ unexplained haemopytsis or suspicious CXR= 2WW
- age >40 + 2 of : cough, fatigue, SOB, chest pain, weight loss or appeitite loss or 1 if smoker = 2WW CXR