Breast cancer
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Breast Cancer. Who Gets What Type of Surgery? Murray Pfeifer 16 th August, 2014. History of Breast Cancer Treatment. Hipppocrates (460-375BC) spoke of two cases Galen (129-200AD) Humoral theory Linked to melancholia Likened to a ‘crab’

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Breast cancer

Breast Cancer

Who Gets What Type of Surgery?

Murray Pfeifer

16th August, 2014


History of breast cancer treatment

History of Breast Cancer Treatment

  • Hipppocrates (460-375BC) spoke of two cases

  • Galen (129-200AD)

    • Humoral theory

    • Linked to melancholia

    • Likened to a ‘crab’

    • Recognised the merit of local excision were possible

  • LeDran 1757 proposed the theory that breast cancer is a local disease

    • Spread at first occurs through the lymphatics to lymph nodes before subsequently entering the general circulation

    • This hypothesis suggests that breast cancer can be cured if treated early with aggressive surgery to the breast.

    • This ‘local theory’ prevailed for about two centuries and was the basis on which radical breast operations were offered to women


The modern era 1

The Modern Era (1)

W Sampson Handley’s ‘Theory of Lymphatic Permeation’ was mooted around 1860

Centrifugal lymphatic permeation is the mechanism for the spread of cancer

This gave support to the radical operations being advocated by Halstead, Moore and others

McWhirter – simple mastectomy supplemented with XRT resulted in the same survival as patients who had radical surgery


The m odern era 2

The Modern Era (2)

Bernard Fisher:

Lymph nodes not an effective barrier to spread

Cancer cells pass easily back and forth between lymphatics and blood vessels

Spread of cancer therefore not an orderly progression from lymphatics to blood stream

Gershon-Cohen:

Breast cancers have a protracted period of occult growth during which time they have a ample opportunity to metastasize

This limits the surgical curability of breast cancer

These theories of breast cancer spread were widely adopted and started a movement to less aggressive surgery


Who gets surgery

Who gets surgery?

  • Almost all women with invasive and in situ breast cancer will receive surgery as part of their management

  • Purpose of surgery:

    • To control the locoregional disease by

      • Extirpation of the primary tumour

      • Removal of involved regional lymph nodes

  • Relative contraindications to surgery:

    • Advanced age and frailty

    • Advanced disease


What are the operations that are available to us to manage invasive breast cancer

What are the operations that are available to us to manage invasive breast cancer?

  • For the primary lesion in the breast:

    • Mastectomy

    • Wide local excision

    • +/- breast reconstruction

      • Immediate

      • delayed

  • For the axilla:

    • Sentinel node biopsy

    • Axillary clearance


Mastectomy

Mastectomy:

Mastectomy has become increasingly conservative as a result of our better understanding of tumour biology

Simple mastectomy aims to remove almost all breast tissue including the axillary tail of the breast, the nipple/ areolar complex, and the underlying pectoral fascia

The need for XRT is obviated in most cases


Indications for simple mastectomy

Indications for simple mastectomy:

  • Large tumour/ small breast

  • Centrally located tumour

  • Multifocal and multicentric cancers

  • Recurrence of cancer previously managed by breast conserving treatment

  • Patient choice

    • Arguably lower local recurrence rates

    • Avoidance of XRT

    • Social aspects of access to XRT at a remote site


Breast conserving treatment

Breast Conserving Treatment:

Wide local excision

And

Radiotherapy

Radiotherapy after BCT is mandatory

  • NSABP B-06

    • recurrence rate after surgery alone – 35%

    • Recurrence rate after surgery and XRT – 10%


Objectives of breast conserving treatment bct

Objectives of Breast Conserving Treatment(BCT):

Good control of the primary cancer

Survival equivalence to mastectomy

Cosmetically acceptable outcome


Good control of the primary tumour

Good control of the primary tumour:

Ipsilateral Breast Tumour Recurrence(IBTR) represents local therapeutic failure and psychological stress for the patient

Minimising IBTR depends on adequate resection of the primary tumour and good radiotherapy to the breast

Risk of dissemination of tumour is increased and survival decreased after local recurrence

IBTR increases risk of dissemination by 3-4x (Fisher et)


How much is enough

How much is enough?

Criteria for acceptable margins is, with time becoming more conservative

  • Previous standard:

    • Ideal >1cm

    • Close but acceptable 5mm-1mm

  • ASTRO and SSO consensus guideline Feb 2014

    • Meta-analysis 33 studies; 28,162 patients

    • Positive margins are associated with a >2x risk of IBTR

    • Negative margins (no ink on tumour)optimise IBTR. Wider margins do not lower risk

    • Rates of IBTR are reduced with use of systemic therapy


Contraindications to bct

Contraindications to BCT

More than one tumour

Large tumour, small breast

Diffuse, suspicious microcalcifications

Previous radiotherapy to the breast

Collagen disorders may result in an adverse response to XRT

Central tumours where there is a need to excise the nipple/areolar complex

Patient choice with respect to XRT


Morbidity of bct

Morbidity of BCT:

Poor cosmesis

Wound complications

Altered nipple sensation

Initial inflammation in the skin post XRT

Later skin thickening and woody contracture of the breast

Post XRT fatigue

Radiation damage to underlying lung and heart

Radiation induced neoplasms egangiosarcoma (1 in 476 patients)

Risk of salvage mastectomy


Is there a survival equivalence between bct and mastectomy in sti ii cancers

Is there a survival equivalence between BCT and Mastectomy in STI-II cancers:

Yes there is!!

Numerous controlled trials have consistently demonstrated this point

Early Breast Trialist Group meta-analysis of 7 RCTs showed no difference in 10 year overall survival rates


Surgery of the axilla

Surgery of the axilla:

Decisions about management of the axilla are made quite independently from decisions about the management of the primary cancer


Why operate on the axilla

Why operate on the axilla?

To assess prognosis

To ‘stage’ the disease for purposes of determining indication for adjuvant systemic therapies and radiotherapy

To resect disease that might be present in the axillary lymph nodes.


Who gets axillary surgery

Who gets axillary surgery?

  • Almost all women with invasive breast cancer

  • Selected women with DCIS

    • Published data – Upgrade diagnosis of DCIS on core bx in around 20% (range 13-40%)

    • About 10% of patients with high risk DCIS have +ve sentinel node (high risk=high grade, large size)

    • Indications for sentinel node biopsy:

      • High grade

      • Large lesion

      • Extensive involvement

      • mastectomy


The operations

The Operations

Two Operations:

  • Sentinel node biopsy

  • Axillary dissection


Sentinel lymph node biopsy

Sentinel lymph node biopsy

The sentinel lymph node is the hypothetical first node or group of nodes draining a cancer

First mooted by Gould (1960) for parotid cancer

Popularised by Cabanas for penile cancer

Used extensively in breast cancer, melanoma, and head and neck cancer


Who gets sentinel node biopsy

Who gets Sentinel node biopsy?

  • Women who have invasive breast cancer and fulfil the following criteria:

    • Small tumour (T1 or T2)

    • No identifiable axillary lymph node involvement

  • Exclusions:

    • Large tumours (T3 or T4)

    • Suspicious or proven positive axillary nodes

    • Prior axillary surgery

    • Prior cosmetic breast surgery

    • Following neoadjuvant systemic therapy


  • Sentinel node biopsy principles

    Sentinel node biopsy – principles

    Combined technique of vital blue dye and radioisotope.

    Technitiumlabelledsulphur colloid injected the day prior to surgery. Usually accompanied by scintngram and CT SPECT

    Blue dye > periareolar injection after induction of anaesthesia

    Combined technique associated with a higher degree of identification of the sentinel node than the use of one or other technique alone.


    Sentinel node biopsy principles1

    Sentinel node biopsy principles

    Node(s) can either be sent for frozen section whilst the patient is on the table with a view to completing the axillary dissection if positive

    Or

    Node(s) can be sent for paraffin section with a view to subsequent further treatment if positive


    How reliable is sentinel node biopsy

    How reliable is sentinel node biopsy?

    • Numerous studies including NSABP B-32, ALMANAC, Milan, and SNAC1 have reported:

      • A success rate of 90-98%

      • False negative rate 5.5 – 15.7%

      • Our own SNAC trial reported a false negative rate - 5.5%


    Management of the axilla where there has been a positive sentinel node biopsy

    Management of the axilla where there has been a positive sentinel node biopsy

    • Controversial but usually completion axillary dissection +/- radiotherapy

    • Management is tending to become more conservative

      • Isolated tumour cells and micrometastases are usually managed with radiotherapy only

      • More extensive axillary disease is now being managed by XRT alone


    Eorct amaros study asco 2013 emeil rutgers

    EORCT AMAROS StudyASCO 2013 – Emeil Rutgers

    • RCT – Surgery v XRT

    • Five year follow up

    • Results:

      • Local recurrence0.54% v 1.03%

      • Disease free survival86.7% v 82.7%

      • Overall survival93.3% v 92.5%

      • Lymphoedema28% v 14%


    Axillary dissection

    Axillary Dissection

    Does it still have place?

    Yes……. But less so than in years gone by


    Axillary dissection why we do it

    Axillary dissection – why we do it

    • Stage the axilla for prognosis

    • Inform the planning of adjuvant therapies

    • Locoregional control of disease

      • 30-40% of patients presenting with breast cancer have disease in the axillary nodes

      • Recurrence rate after axillary dissection <2%

      • Therefore an improvement in DFS

    • Possible improvement in overall survival (but note NSABP B-04 – no survival advantage for patients with clinically negative axilla who had ALND compared to the group in whom an expectant approach was taken).


    Who gets axillary dissection

    Who gets axillary dissection?

    • Patients with large tumours – T3 or T4

    • Patients with confirmed axillary node metastasis

      • Palpable enlarged axillary lymph nodes

      • Suspicious axillary nodes seen on ultrasound examination of the axilla

      • Usually confirmed by ultrasound guided FNA cytology


    The morbidity of axillary dissection

    The morbidity of axillary dissection:

    Wound infection

    Seroma

    Pain, parasthesia, and numbness in the distribution of the intercostobrachial nerve

    Frozen shoulder

    lymphoedema


    Is sentinel node biopsy superior to axillary dissection with respect to complications

    Is sentinel node biopsy superior to axillary dissection with respect to complications?

    • ACSOG Z0011, ALMANAC both show that there is significantly less morbidity after SLNB when compared to ALND (70% adverse effects v 25% overall)

    • Inconsistent application of protocols and incomplete data capture was a problem in both of these two studies as it has been in other published studies.


    Ductal carcinoma in situ

    Ductal Carcinoma In Situ

    A condition in which presumably malignant cells proliferate within lactiferous ducts with no evidence of invasion through the basement membrane

    Heterogeneous pathology with highly variable appearance, biology and behaviour

    Represents around 20% of the caseload

    Is largely a disease entity of the mammographic era

    The approach to surgical management is somewhat different


    What surgery is offered

    What surgery is offered?

    Mastectomy +/- reconstruction is a commonly utilised option

    • Best for large lesions, and multifocal/multicentric lesions

    • Low local recurrence rate (1%-2%)

    • In most instances obviates the need for XRT

    • For many patients it represents too much treatment

    • Psychosocial issues:

      • For some the reassurance of a high probability of cure is reassuring

      • For others there is the psychological morbidity of what might be perceived as a mutilating operation


    What surgery is offered1

    What surgery is offered:

    Wide local excision

    Wide local excision alone is associated with a high local recurrence rate (NSABP 20.9% at 5years)

    May be acceptable in selected patients ie small, non high grade lesions with good margins (>10mm)

    Wide local excision plus XRT lower local recurrence rates (8%-10% at 5years)

    About half of the local recurrences are invasive


    What margins are required in bct for dcis

    What margins are required in BCT for DCIS?

    A vexed question in this condition because of the high incidence of multifocality and multicentricity which makes pathological assessment of margins difficult

    NZ guideline – margin should be >2mm

    Ideal is 10mm

    Involved margins demands further surgery


    Management of the axilla in dcis

    Management of the Axilla in DCIS

    • Theoretically DCIS should not involve nodes

    • In practice microinvasion or even overt invasive disease in another part of a lesion may result in nodal metastasis in up to 25% of lesions diagnosed as DCIS on work up

    • Risk factors:

      • Large tumour

      • High grade

      • Palpable tumour

      • Mammographic density


    Should patients with a preoperative diagnosis of dcis have sentinel node biopsy

    Should patients with a preoperative diagnosis of DCIS have sentinel node biopsy?

    Indications for sentinel node biopsy in DCIS:

    Large lesion

    High grade

    Palpable tumour

    Mammographic density

    Patient is having a mastectomy


    Who gets what operation

    Who gets what operation?

    40 years ago -

    MASTECTOMY and AXILLARY DISSECTION

    Today –

    Multi disiplinary approach with surgery tailored to the needs of the patient and her condition and integrated with radiotherpy and systemic therapies

    Thankyou


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