Patient centred; Multi-disciplinary Breast Cancer treatment The New Method Forward
The following key practical points and guidelines taken from international working groups such as American Socieity of Clinical Oncology; St Gallen consensus; European school of Oncology; European school of Onco-reconstruction and NIH data should ensure that your patient with breast cancer gets gold standard and individual based treatment. These methods that have been available, tried and tested and combined with the following key practical points account for a new method in breast cancer management: the patient centred multidisciplinary team approach.
Stood the test of time: Triple assessment
The gold standard today is the triple assessment and while not new is still not used by certain clinicians. All patients should have an ultrasound and mammogram depending on their age and wherever possible a needle biopsy; preferably a core needle biopsy. Incision and excision biopsies of breast masses for diagnostic purposes should not be done unless a failed needle biopsy in terms of pathological information is obtained.
Team approach
A multidisciplinary team approach is considered the standard of care in all patients. All patients after being diagnosed with a breast cancer should be presented to a multi-disciplinary team consisting of a cancer surgeon; radiologist; pathologist; reconstructive surgeon; oncologist; radiation oncologist and psychologist. Discussions around whether to start with surgery or primary chemotherapy; reconstructive options particularly taking into account potential needs for radiation therapy should all be discussed.
Once a cancer has been diagnosed, there is no harm in taking a few days to discuss the different treatment options. Waiting a day or two, participating in the discussions and understanding what the different treatment options are, will help ensure ultimate psychological, cosmetic and best cancer management.
Margins in breast cancer surgery
This year will start the era of the clear margin in breast cancer surgery. All the studies agree that young age and positive margins are the most important risk factor for recurrence after breast conservation therapy. It is accepted that insufficient margins are related to local recurrence. The question as to what the required margin should be macroscopically and microscopically finally has consensus. 10 mm is the standard now accepted for both DCIS and invasive breast cancer. This has been supported by the
EORTC Study 22881 that involved 5300 patients. It highlights the significance of free margins for prognosis in women below the age of 35. It also suggests that the minimal requirement is complete excision of the tumour, both the invasive and intraduct component with a surrounding rim of uninvolved normal breast parenchyma of 10mm and possibly a larger margin in younger patients. This is also supported by the data from Auldreich who showed that in 2875 patients an independent statistically significant factor resulting in local recurrence was margins and Sainsbury meta-analysis showed that positive margins showed a 34 times greater chance of having a local recurrence. The next most significant factor is age. It seems as if in the future there will be a tendency to strive towards large tumour free margins and quadrantectomies will be practiced even for medium size tumours. Further well controlled studies with accurate pathological reporting and homogenous use of terminology is needed to determine what the difference in the younger and older patient age groups will be for microscopically uninvolved margin. We tend in our practice to lean towards quadrantectomy. The November consensus statement came to challenge the previous sacrosanct understanding that local recurrence does not affect survival.
The 2000 NIH consensus statement quotes that a quarter of isolated local recurrences will result in death from breast cancer thus perpetuating the concept of wider local excision. Richard Peto goes on to explain that by preventing 20 local recurrences, 5 cancer deaths will be prevented every 15 years. From this point of view the creation of free margins in conjunction with a good cosmetic result should be a decisive factor in breast conserving surgery. If the validity of the above article is confirmed by further studies it seem that the dictum of breast conservation surgery will move to wider excisions.
The specimen should be orientated, labeled and given to the pathologist to confirm the diagnosis of cancer, and to help the surgeon to decide intra-operatively whether or not the specimen margins are “grossly” free of tumour. If the margin is positive additional tissue is removed from the area until we have a histologically free margin. It is important to assess the margins intra-operatively with histology combined with cytology. Frozen section is accurate as a means to exclude positive margins. Small section intra-operative histology or in its absence the use of imprint cytology or cytological scrimping techniques aid in the evaluation of margins.
The following points are now considered standard
Key practical points:
Diagnosis
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The diagnosis of breast cancer is based on clinical examination; mammography and ultrasound and pathologic diagnosis by needle biopsy. |
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Pathological diagnosis with fine needle biopsy or core biopsy preferably should be obtained prior to any surgical procedure. |
Staging and risk assessment
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TNM staging based on H&E staining, standardised grading, description of histological types, resection margins, lymph vascular invasion should be reported. |
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Determination of oestrogen receptor and progesterone receptor status is mandatory, preferably by immunohistochemistry. |
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Reports of immunohistochemical results for ER and PR should include the percentage of ER and PR positive cells. |
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Immunohistochemical determination of HER2 should also be performed. |
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With ambiguous her2 immunohistochemistry, in situ hybridisation (FISH) to determine HER2 gene amplification should be considered. |
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Routine staging examinations include physical examination, full blood count, routine chemistry including liver enzymes, alkaline phosphatase, calcium and menopausal status. |
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Only in high risk patients (N2 >= 4 pos lymph nodes; or T4 tumours; or with laboratory or clinical signs or symptoms suspicious for the presence of metastases) are chest Xray, ultrasound or bone scan appropriate. |
Patient Follow-up
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History taking, eliciting symptoms and physical examination every 3-6 months for 3 years , then 6-12months for 3 years, then annually with attention paid to long term side-effects (osteoporosis). |
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Ipsilateral and contralateral radiology every year. |
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Not routinely recommended for asymptomatic patients: blood counts; chemistry, chest Xray, bone scan, liver ultrasound, chest scans of chest or abdomen and any tumour marker such as CA 153, CEA are not recommended. |
Tumour Markers
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Serum tumour markers should be used only as a guide to aid treatment decisions and monitor response of not easily measurable disease in the metastatic breast cancer settings and not for screening or diagnosis. |
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The proliferation marker Ki-67 provides important prognostic information , particularly for patients with small tumours and no axillary node involvement. |
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Oestrogen and progesterone receptors and their degree of positive are excellent predictors of response in all patients (all stages ) with breast cancer and aid the multi-disciplinary team as to which hormonal therapy should be used. |
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Over-expression of the Her-2/neu protein is associated with poor prognosis and can be used to select patients for trastuzumab (Herceptin) therapy. |
Chemotherapy
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The role of systemic chemotherapy has been confirmed in a recent meta-analysis of most subsets of patients with breast cancer. |
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Anthracycline-containing regemins are superior to non-anthracycline containing regimens. |
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The addition of the taxanes seems to improve overall survival in node positive disease and in ER/PR negative breast cancers. |
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To ensure optimal care for all patients a multi-disciplinary approach should be utilised for all patients so as to develop an optimal treatment plan. |
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Primary chemotherapy is the gold standard for all patients with locally advanced breast cancer. |
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Primary chemotherapy can be used to facilitate cosmesis and make breast conservation feasible in some patients. |
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Systemic chemotherapy produces durable remission in some patients with metastatic breast cancer. |
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Amplification of the Her2/neu is associated with increased aggressiveness of breast cancers. Trastuzumab should be utilised in these patients. |
Systemic chemotherapy can improve survival in patients with metastatic breast cancer.
Radiation
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All patients with invasive carcinoma should receive radiation therapy as part of breast conservation therapy. |
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Patients undergoing intra-operative radiation should be part of a trial. |
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Patients with implants, collagen vascular disease, very large breasts, locally advanced breast cancers or who have had primary chemotherapy should all see the radiation oncologist as part of the multi-disciplinary team prior to having surgery. |
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Post – operative radiation to the nodal basins and chest wall is appropriate in all stage 3, stage 2 with 4 or more positive nodes (1-3 nodes positive conflicting data). |
Endocrine therapy
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All patients with hormone receptor –positive tumours are candidates for endocrine therapy. |
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Endocrine therapy reduces the risk of recurrence and improves overall survival. |
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Patients with ER/PR negative tumours should not get hormonal therapy. |
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Hormonal theray should be started once chemotherapy is completed. |
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Concurrent use of Tamoxifen and radiation therapy is not recommended due to potential risk of lung toxicity. |
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Aromatase inhibitors are to be used in post menopausal patients. |
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Aromatase inhibitors instead or in sequence with tamoxifen significantly reduce the risk of recurrence. |
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Certain subgroups (ER+/PR-; HER2+) seem to have a more marked benefit with aromatase inhibitors. |
Reconstruction
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Breast reconstruction is considered vital to the patients rehabilitation and an intrinsic part of breast cancer treatment (if this is the patients desire). |
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Immediate reconstruction is and should be available to most patients with breast reconstruction. |
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Skin sparing mastectomy has proven to be a safe and effective surgical approach (leaving less than 1% of breast tissue) and facilitating most reconstructive surgical options. |
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Patients receiving adjuvant radiation therapy or primary chemotherapy should have multidisciplinary discussions so as to ensure the safest reconstructive options are offered to the patient. |
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Oncology surgery reigns supreme and should not be compromised for the sake of reconstruction. |
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Implants and expanders are generally not compatible with radiation (should not be placed in a patient who is going to receive radiation therapy). |
The rules
The following rules should be adhered to when managing breast cancer patients.
Surgical Rules
The principles remain whether doing breast conservation or mastectomy.
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The type of surgery offered depends on the breast size; tumour size and position; lobular or ductal; whether radiation therapy will be given; and nodal status. |
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Strict adherence to clear surgical margins. |
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Clipping of surgical beds in breast conservation. |
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Use of sentinel lymph node biopsy in node negative cancers and axillary sampling /dissection (>8 lymph nodes) merely for prognostic and treatment guidelines. |
Chemotherapy rules:
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Most premenopausal women. |
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All tumours greater than 1,5cm cm in women fit for chemotherapy. |
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1 lymph node or more positive disease. |
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Tumours which are hormone receptor negative. |
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Tumours with aggressive biology (lymph vascular invasion, poorly differentiated. |
Radiation therapy rules.
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Any person who has had breast conserving surgery. |
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Any person who has had a mastectomy and has close margins i.e. margins less than 10mm from the tumour. |
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Ulcerated or fixed tumours which are not surgically resectable in patients who are not fit for chemotherapy. |
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Any person who has a locally advanced breast cancer. |
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4 or more lymph nodes positive. |
Onco-Reconstruction Rules
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Oncology surgery principles must apply. |
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Don’t place prostheses or expanders should radiation be needed. |
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Latissimus flaps are the flap of choice to radiate on. |
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Careful pre-operative planning. |
Primary chemotherapy Rules
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Accurate radiological marking of the tumour prior to starting chemotherapy with placement of a radio-opaque marker. |
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Pathological information (core biopsy) with grading ; receptors and Her2 status. |
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Nodal information from radiology (ultrasound); pathology (FNA or SLNB) prior to staring chemotherapy. |
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Clinical and radiological follow-up to assess response. |
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Although SLNB has shown to be accurate in some studies a partial axillary sampling with the SLNB is advised should radiation decision need to be made. |
The psychology of breast cancer
Most patients experience psychological problems following the diagnosis of breast cancer. A recent report revealed over 80% of patients will experience either a sub clinical depression or chronic fatigue features up to 10 years after breast cancer diagnosis and treatment. The most difficult period is between diagnosis and surgery or treatment.
Breast cancer affects not only the patient but the patient’s family and open communication between family members is important. Intimacy issues must be addressed and can be problematic as each partner is trying to come to terms with their feelings.
Breast cancer patients will also experience certain fears around their treatment such a fear of being sick, fear of being in pain, fear of the side effects of treatment and fear of disfigurement. Thoughts of disfigurement after mastectomy can be reduced by having reconstructive surgery if this is an option.
All breast cancer patients and their families should have some form of psychological support available.
In Conclusion
The psychological management of the patient is imperative to good outcome. Onco-reconstruction principles should be used in all patients undergoing breast cancer surgery (tried and tested now for over 20years) and immediate reconstruction is the procedure of choice should this be the women’s wish. Strict adherence to margins (greater than 1 cm) for both DCIS and invasive cancer surgery and sentinel lymph node biopsy in node negative tumours are essential for good cancer surgery. Greater use of primary chemotherapy and understanding oncological and radiation therapy principles should now be part of the breast surgeons armamentarium.
New management principles revolve around patient centred, multidisciplinary team approach to breast cancer. |