Breast Pathology Flashcards
What imaging modalities are used for the breasts?
Mammogram
Ultrasound
MRI
What are the 5 classifications from fine needle aspiration?
C1 - unsatisfactory C2 - benign C3 - atypia C4 - suspicious C5 - malignant
Describe how fine needle aspiration is carried out
Orange or blue needle syringe put into the area of interest and aspirated
(Epithelial cells come out easier than stromal cells)
What samples from the breast can be sent for cytopathology?
Fluid from cysts
Nipple discharge
Nipple scrape
What histopathological techniques can be used for investigation of breast lumps?
Needle core biopsy
Vacuum assisted biopsy
Skin biopsy
Incisional biopsy
What are the classifications given from needle core biopsy?
B1 - Unsatisfactory B2 - Benign B3 - atypia B4 - suspicious B5 - malignant B5a - carcinoma in situ B5b - invasive carcinoma
Which muscle does the blood supply to the breast pass through?
Pec major
Give examples of developmental abnormalities of the breast
Hypoplasia
Juvenile hypertrophy
Accessory tissue/nipples
Give examples of non-neoplastic benign breast disease
Gynaecomastia Fibrocystic change Hamartoma Fibroadenoma Sclerosing lesions - sclerosing adenosis, radial scar, complex sclerosing lesions
What is gynaecomastia?
Breast development in the male
Duct growth without lobular development
What can cause gynaecomastia?
Hormones
Cannabis
Prescription drugs
Liver disease
Who gets fibrocystic changes in the breast?
Women 20-50
But mostly 40-50
What menstrual features are associated with fibrocystic change?
Early menarche
Late menopause
Menstrual abnormality
How does fibrocystic change in the breast present?
Smooth discrete lumps
Sudden pain due to bleeding or rupture
Cyclical pain
Lumpiness
Describe the cysts found in fibrocystic change in the breasts
1mm - several cm Blue domed with pale fluid Multiple Thin walled Lined with apocrine epithelium
How is fibrocystic change in the breast managed?
Exclude malignancy
Reassure
Can excise if necessary
What is a hamartoma?
Well circumscribed lesion composed of cell types normal to breast but present in abnormal proportion or distribution
Who commonly gets fibroadenomas?
African women
20s
How does a fibroadenoma present?
Solitary Painless Firm Mobile Grey-white colour Local hyperplasia "Breast mouse"
How does a fibroadenoma appear on ultrasound?
Solid
How is a fibroadenoma managed?
Reassure
Excise
What is the difference between a radial scar and a complex sclerosing lesion?
Size
Radial scar 1-9mm
CSL 10+mm
What is sclerosing adenosis?
Proliferative lesion which has become hardened, damaged or distorted
How does a radial scar appear?
With central puckering
Translucent, oval lesions in the middle
How does a radial scar/CSL appear histologically?
Fibro-elastic core
Radiating fibrosis
Fibrocystic change
Epithelial proliferation
Give examples of inflammatory breast disease
Fat necrosis
Duct ectasia
Acute mastitis
Abscess
What causes fat necrosis?
Local trauma eg surgery, seatbelt injury
Warfarin therapy
Describe the pathophysiology of fat necrosis
Trauma causing damage and disruption of adipocytes
Infiltration by acute inflammatory cells
Foamy macrophages enter
Subsequent fibrosis and scarring
How is fat necrosis managed?
Exclude malignancy
What is duct ectasia?
Blockage or clogging or one lactiferous duct
How does duct ectasia present?
Inflammation, pain, hot Fibrosis and scarring Distortion Discharge Nipple retraction/distortion
How is duct ectasia managed?
Treat acute infection
Exclude malignancy
Stop smoking
Excise ducts
What is a Phyllode’s tumour?
Biphasic, slow-growing, unilateral tumour with stromal overgrowth
What age group most commonly get Phyllode’s tumour?
40-50
How may intraduct papilloma present?
Nipple discharge and blood
Can be asymptomatic
What age group commonly get intraduct papilloma?
35-60
Which cell type covers intraduct papilloma?
Myoepithelium
Describe the core of an intraduct papilloma
Fibrous
What is the malignant component of a Phyllode’s tumour?
Sacromatous stromal component
When do women tend to get angiosarcoma of the breast?
Post radiotherapy
Which malignant tumours can spread to breast?
Bronchial carcinoma Ovarian serous carcinoma Clear cell carcinoma of the kidney Malignant melanoma Leiomyosarcoma
Where does a breast carcinoma arise?
Glandular epithelium of the terminal duct unit
Give examples of precursor lesions to malignant breast tumour
Ductal - Epithelial hyperplasia of usual type Columnar cell change Atypical ductal hyperplasia Ductal carcinoma in situ
Lobular -
Atypical hyperplasia
Lobular carcinoma in situ
Where is an in situ breast carcinoma confined to?
Basement membrane of acini and ducts
Describe a lobular in situ neoplasia
Small - int sized nuclei
Intracytoplasmic lumen and vacuoles
Bilateral and multifocal
Which hormonal receptors does a lobular neoplasia in situ have?
Oestrogen
Which gene is affected in lobular neoplasia in situ and how?
Deletion and mutation of CDHI gene on chromosome 16q22.1
What is the risk of invasive carcinoma increased by with ductal carcinoma in situ?
10x
What is the most common breast malignancy?
DCIS
How is DCIS managed?
Excised
Adjuvant radiotherapy
Anti-oestogen
What is Paget’s disease of the nipple?
High grade DCIS which extends along the ducts to the epidermis of the nipple
What is a micro-invasive carcinoma?
DCIS of a high grade with invasion of less than 1mm
What are protective factors for invasive carcinoma?
First child early
Breastfeeding
Exercise
Which genes are associated with breast and ovarian cancer?
BRCA1 and 2
Which gene is associated with Li Fraumeni syndrome?
TP53
Which tumours are associated with Li Fraumeni syndrome?
Childhood sarcoma Brain Leukaemia Adrenocortical carcinoma Early-onset breast
Which tumours are associated with BRCA 1?
Breast
Ovarian
Bowel
Prostate
Which tumours are associated with BRCA2 gene?
Breast (incl male)
Ovarian
Prostate
Pancreatic
Which gene is associated with Cowden’s syndrome?
PTEN
Which tumours are associated with Cowden’s syndrome?
Breast
GI
Thyroid
Which genes are associated with Peutz-Jeghers syndrome?
STK11
LBK1
Which tumours are associated with Puetz-Jegher’s syndrome?
Breast
GI
Pancreatic
Ovarian
Which gene is associated with ataxia telangiectasia?
ATM
Which tumours are associated with ataxia telangiectasia?
Non-Hodgkin lymphoma
Ovarian
Breast
What hormone receptors may invasive carcinoma have?
Oestrogen
Progesteron
HER2
In assessment of an invasive carcinoma, which score makes it Grade 1?
3-5
In assessment of an invasive carcinoma, which score makes it Grade 2?
6-7
In assessment of an invasive carcinoma, which score makes it Grade 3?
8-9
What factors are used in the assessment of an invasive carcinoma?
Tubular differentiation
Nuclear pleomorphism
Mitotic activity
How can oestrogen receptor positive cancers be manged?
Tamoxifen
Aromatase inhibitors (letrozole)
GnRH inhibitors (Goserilin, zoladex)
Oophorectomy
What is the role of aromatase in the female?
Convert androgen to oestrogen
What does HER2 stand for?
Human epidermal growth factor receptor 2
What prognostic tools are used for breast malignancy?
Nottingham Prognostic Index
Adjuvant! Onine
PREDCIT
What factors does the Nottingham Prognostic Index take into account?
0.2x tumour diameter
Tumour grade
Lymph node status
What factors does Adjuvant! Online take into account?
Histopathology
ER pos/neg
Clinical factors
What factors does PREDICT take into account?
Histopathology Clinical factors HER2 ER pos/neg Mode of detection
How does sclerosing adenosis present?
Can be painful or symptomatic
Which age group commonly gets sclerosing adenosis?
20-70
How is a radial scar treated?
Excise
How does duct ectasia change breast structure?
Dilates subareolar ducts
Describe the discharge found in duct ectasia
Purulent
Bloody
Phyllode’s tumour commonly metastasises to axillary nodes
True/false
False
Recurrence common but mets rare
What is the difference between atypical lobular hyperplasia and lobular carcinoma in situ?
Atypical lobular hyperplasia <50% lobule involved
Lobular CIS >50% lobule involved
What is the next step if lobular neoplasia found on core biopsy?
Excisional or vacuum biopsy to exclude higher grade malignancy
How is a micro-invasive carcinoma managed?
Same as DCIS
What is an invasive breast carcinoma?
Malignant epithelial cells which have breached the basement membrane
Why is high BMI associated with higher rates of breast cancer?
Increased oestrogen production
Which chemo drug are HER2 positive cancers sensitive to?
Trastuzumab (Herceptin)