Breast Medicine Flashcards
What is a fibroadenoma of the breast?
Benign breast tumour consisting of stromal + epithelial cells breast duct tissue
* Young women
* Well circumscribed (well-defined borders) mobile mass
* Round, smooth, painless
- Respond to female hormones (oestrogen + progesterone) → why they are more common in young women
How do breast cysts clinically present?
Benign, individual, fluid-filled lumps
* Can be painful
* Size may fluctuate over menstrual cycle
O/E:
* Smooth
* Well-circumscribed
* Mobile
* Possibly fluctuant
Ix + management of breast cyst
Ix: Imagining (USS or mamogram (dependent on age) - to exclude cancer
Management:
* Aspiration (can resolve pain)
* Excision
Having a breast cyst may slightly increase the risk of breast cancer.
What is a lipoma and how do they oresent O/E?
Lipoma = benign tumours of fat (adipose) tissue
O/E:
* Soft
* Painless
* Mobile
* No skin changes
Management:
* Reassurance (conservatively)
* Surgical removal
Lipomas can occur anywhere in the body where there is adipose tissue
What are fibrocystic breast changes?
(Previously called fibrocystic breast disease)
-
Benign
The connective tissues (stroma) + ducts + lobules of the breast = respond to oestrogen + progesterone → becoming fibrous (irregular + hard) + cystic (fluid-filled) - Changes fluctuate with the menstrual cycle
- Common in menstruating women
- Symptoms often occur prior to menstruating (within 10 days) and resolve once menstruation begins.
- Symptoms usually improve or resolve after menopause
Fibrocystic breast changes + generalised lumpiness to the breast = normal variation (not disease)
Symptoms of fibrocystic breast changes
Symptoms can affect different areas of the breast, or both breasts, with:
* Lumpiness
* Breast pain or tenderness (mastalgia)
* Fluctuation of breast size
Varies in severity + can significantly affect a patient’s quality of life if severe
Management for fibrocystic breast changes
Exclude cancer
Options to manage cyclical breast pain (mastalgia) include:
Wearing a supportive bra
* Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen
* Avoiding caffeine
* Applying heat to the area
* Hormonal treatments (e.g., danazol and tamoxifen) under specialist guidance
What is fat necrosis of the breast?
Fat necrosis = causes a benign lump formed by localised degeneration + scarring of fat tissue in the breast.
What can trigger fat necrosis in the breast?
Fat necrosis = may be associated with an oil cyst
Triggers:
* Localised trauma
* Radiotherapy
* Surgery
….with an inflammatory reaction → resulting in fibrosis + necrosis (death) of fat tissue
Fat necrosis = does not increase risk of Breast Ca
How does fat necrosis in the breast present on O/E?
- Painless
- Firm
- Irregular
- Fixed in local structures
- May be skin dimpling or nipple inversion
Ix for fat necrosis in breast
- Ultrasound or mammogram = can show a similar appearance to breast cancer.
- Histology (by fine needle aspiration or core biopsy) = may be required to confirm the diagnosis and exclude breast cancer.
Management for fat necrosis of breast
Exclude cancer
- Usually conservatively → resolves spontaneously
- Surgical excision if symptomatic
What is a galactocele?
- Benign
- Galactoceles = occur in breastfeeding women - usually when they’ve stopped breasfeeding
- Galactoceles = lactiferous duct becomes blocked → breast milk filled cyst → prevents gland from draining milk
How do galactoceles present?
- Firm
- Mobile
- Painless
- Usually beneath the areola
Management for galactocele
- Usually resolve without treatment
- Drain with needle
- Rarely become infected → require Abx
What is a Phyllodes tumour?
Phyllodes tumour = rare tumours of connective tissue (stroma) of breast
* Large + fast-growing
They can be:
* Benign (~50%)
* Borderline (~25%)
* Malignant (~25%).
What age do Phyllodes tumour usually occur in?
40-50
Management of Phyllodes tumour
- Surgical excision of tumour + surrounding tissue (‘wide excision’)
- Chemotherapy (if malignant or metastatic)
Phyllodes tumour can reoccur after removal
An obese 26-year-old woman is involved in a car accident and injures her right breast. Once this initial injury heals, she develops a firm lump within the breast tissue at the trauma site. What diagnosis would a biopsy show?
Fat necrosis
A 28-year-old woman presents to her GP having noticed a lump in her left breast. She is otherwise asymptomatic, with no constitutional symptoms. On examination, she has a smooth, mobile lump in her left breast measuring ~1cm x 1cm. Diagnosis?
Fibroadenoma
Investigations for fibroadenoma
- Mammogram: well-circumscribed, oval hypodense or isodense mass, may contain calcifications
- Breast ultrasound: well-circumscribed, round to ovoid, or macrolobulated mass with generally uniform hypoechogenicity
Management for fibroadenoma
- Resolve spontaneously
Large or for cosmetic reasons → surgery:
* Lumpectomy: surgical removal of the fibroadenoma
* Cryoablation : cryoprobe used to freeze and destroy the fibroadenoma
Pathophysiology of fibroadenoma
- Arise from proliferation of stromal + epithelial connective tissue cells within the breast tissue
- These tissues = rich in receptors for oestrogen + proliferation → can therefore proliferate significantly during pregnancy
What is an intraductal papilloma?
- Intraductal papilloma = warty lesion that grows within a breast duct - as a result of proliferation of epithelial cells
- Intraductal papillomas = benign tumours (but can be associated with atypical hyperplasia or breast cancer)
How does an intraductal papilloma present?
Typically asymptomatic
Occur at any age - typically 35-55 years
- Nipple discharge (clear or blood-stained)
- Tenderness or pain
- A palpable lump
Ix for an intraductal papilloma
Patients require triple assessment with:
* Clinical assessment (history and examination)
* Imaging (ultrasound, mammography and MRI)
* Histology (usually by core biopsy or vacuum-assisted biopsy)
Ductography = may also be used
This involves injecting contrast into the abnormal duct and performing mammograms to visualise that duct. The papilloma will be seen as an area that does not fill with contrast (a “filling defect”).
Management for an intraductal papilloma
Complete surgical excision
After removal, the tissue is examined for atypical hyperplasia or cancer that may not have been picked up on the biopsy.
What is a breast abscess?
Collection of pus within the area of the breast - usually caused by a bacterial infection
- Lactational abscess (associated with breastfeeding)
- Non-lactational abscess (unrelated to breastfeeding)
Which type of breast abscess is associated with breastfeeding?
Lactational abscess
What does pus contained?
Dead white blood cells
Pus = a thick fluid produced by inflammation.
It contains dead white blood cells of the immune system and other waste from the fight against the infection. When pus becomes trapped in a specific area and cannot drain, an abscess will form and gradually increase in size.
What is mastitis?
Mastitis = inflammation of breast tissue
* Often related to breastfeeedimg (lactational mastitis) - although can be caused by infection
- Bacteria can enter at the nipple and back-track into the ducts, causing infection and inflammation.
- Mastitis caused by infection = may precede the development of an abscess
What lifestyle factor is a key risk factor for infective mastitis + breast abscesses?
Smoking
Name some instances that can increase the risk of breast abscesses
Damage to the nipple:
* Nipple eczema
* Candidal infectiom
* Piercings
Underlying breast disease:
* Cancer
(Can affect the drainage of the breast - prepdisposing it to infection)
What are some causative bacteria for breast abscesses?
- Staphylococcus aureus (the most common)
- Streptococcal species
- Enterococcal species
- Anaerobic bacteria (such as Bacteroides species and anaerobic streptococci)
Staph aureus, streptococcal and enterococcal bacteria = gram-positive bacteria → so what group of antibiotics are likely to be effective?
Penicillins
Flucloxacillin = used against staph aureus skin infections
What antibiotics are effective against anaeorbic bacteria?
- Co-amoxiclav (plus clavulanic acid)
- Metronidazole
Simple penicillins (amoxicillin or flucloxacillin) = wont work
What is the nature of the onset of mastitis or breast abscess?
Usually acute (a few days)
How does mastitis with infection present?
- Nipple changes
- Purulent nipple discharge (pus from the nipple)
- Localised pain
- Tenderness
General inflammation:
* Warmth
* Erythema (redness)
* Hardening of the skin or breast tissue
* Swelling