ABC IMPORTANT DEFINITIONS |
VISCERAL CRISIS is defined as severe organ dysfunction as assessed by signs and symptoms, laboratory studies, and rapid progression of disease. Visceral crisis is not the mere presence of visceral metastases but implies important visceral compromise leading to a clinical indication for a more rapidly efficacious therapy, particularly since another treatment option at progression will probably not be possible. | Expert opinion | 95 |
PRIMARY ENDOCRINE RESISTANCE is defined as: Relapse while on the first 2 years of adjuvant ET, or PD within first 6 months of 1st line ET for MBC, while on ET. SECONDARY (ACQUIRED) ENDOCRINE RESISTANCE is defined as: Relapse while on adjuvant ET but after the first 2 years, or Relapse within 12 months of completing adjuvant ET, or PD ≥ 6 months after initiating ET for MBC, while on ET. Note: resistance is a continuum and these definitions help mainly clinical trials and not necessarily clinical practice
| Expert opinion | 67 |
GENERAL STATEMENTS |
The management of ABC is complex and, therefore, involvement of all appropriate specialties in a multidisciplinary team (including but not restricted to medical, radiation, surgical oncologists, imaging experts, pathologists, gynecologists, psycho-oncologists, social workers, nurses and palliative care specialists), is crucial. | Expert opinion | 100 |
From the time of diagnosis of ABC, patients should be offered appropriate psychosocial care, supportive care, and symptom-related interventions as a routine part of their care. The approach must be personalized to meet the needs of the individual patient. | Expert opinion | 100 |
Following a thorough assessment and confirmation of MBC, the potential treatment goals of care should be discussed. Patients should be told that MBC is incurable but treatable, and that some patients can live with MBC for extended periods of time (many years in some circumstances). This conversation should be conducted in accessible language, respecting patient privacy and cultural differences, and whenever possible, written information should be provided.
| Expert opinion | 97 |
Patients (and their families, caregivers or support network, if the patient agrees) should be invited to participate in the decision-making process at all times. When possible, patients should be encouraged to be accompanied by persons who can support them and share treatment decisions (e.g. family members, caregivers, support network). | Expert opinion | 100 |
There are few proven standards of care in ABC management. After appropriate informed consent, inclusion of patients in well-designed, prospective, independent trials must be a priority whenever such trials are available and the patient is willing to participate. | Expert opinion | 100 |
The medical community is aware of the problems raised by the cost of ABC treatment. Balanced decisions should be made in all instances; patients’ well-being, length of life and preferences should always guide decisions. | Expert opinion | 100 |
Specialized oncology nurses (if possible specialized breast nurses) should be part of the multidisciplinary team managing ABC pts. In some countries this role may be played by a physician assistant or another trained and specialized health care practitioner. | Expert opinion | 92 |
All ABC patients should be offered comprehensive, culturally sensitive, up-to-date and easy to understand information about their disease and its management. | 1 B | 97 |
The age of the patient should not be the sole reason to withhold effective therapy (in elderly patients) nor to overtreat (in young patients). Age alone should not determine the intensity of treatment. | 1 B | 100 |
ASSESSMENT GUIDELINES |
Minimal staging workup for MBC includes a history and physical examination, hematology and biochemistry tests, and imaging of chest, abdomen and bone. | 2 C | 67 |
Brain imaging should not be routinely performed in asymptomatic patients. This approach is applicable to all patients with MBC including those patients with HER-2+ and/or TNBC MBC. | Expert opinion | 94 |
The clinical value of tumor markers is not well established for diagnosis or follow-up after adjuvant therapy, but their use is reasonable (if elevated) as an aid to evaluate response to treatment, particularly in patients with non-measurable metastatic disease. A change in tumor markers alone should not be used to initiate a change in treatment. | 2 C | 89 |
Evaluation of response to therapy should generally occur every 2–4 months for ET or after two to four cycles for CT, depending on the dynamics of the disease, the location and extent of metastatic involvement, and type of treatment. Imaging of target lesions may be sufficient in many patients. In certain patients, such as those with indolent disease, less frequent monitoring is acceptable. Additional testing should be performed in a timely manner, irrespective of the planned intervals, if PD is suspected or new symptoms appear. Thorough history and physical examination must always be performed.
| Expert opinion | 81 |
TREATMENT GENERAL GUIDELINES |
Treatment choice should take into account at least these factors: HR and HER-2 status, previous therapies and toxicities, disease-free interval, tumour burden (defined as number and site of metastases), biological age, performance status, co-morbidities (including organ dysfunctions), menopausal status (for ET), need for a rapid disease/symptom control, socio-economic and psychological factors, available therapies in the patient’s country and patient preference. | Expert opinion | 100 |
ER +/HER-2 NEGATIVE ABC |
Endocrine treatment after CT (maintenance ET) to maintain benefit is a reasonable option, although this approach has not been assessed in randomized trials. | 1 C | 88 |
Concomitant CT+ET has not shown a survival benefit and should not be performed outside of a clinical trial. | 1 B | 100 |
CHEMOTHERAPY AND BIOLOGICAL THERAPY |
Both combination and sequential single agent CT are reasonable options. Based on the available data, we recommend sequential monotherapy as the preferred choice for MBC. Combination CT should be reserved for patients with rapid clinical progression, life-threatening visceral metastases, or need for rapid symptom and/or disease control | 1 B | 96 |
In the absence of medical contraindications or patient concerns, anthracycline or taxane based regimens, preferably as single agents, would usually be considered as first line CT for HER-2 negative MBC, in those patients who have not received these regimens as (neo)adjuvant treatment and for whom chemotherapy is appropriate. Other options are, however, available and effective, such as capecitabine and vinorelbine, particularly if avoiding alopecia is a priority for the patient. | 1 A | 71 |
In patients with taxane-naive and anthracycline-resistant MBC or with anthracycline maximum cumulative dose or toxicity (i.e. cardiac) who are being considered for further CT, taxane-based therapy, preferably as single agents, would usually be considered as treatment of choice. Other options are, however, available and effective, such as capecitabine and vinorelbine, particularly if avoiding alopecia is a priority for the patient. | 1 A | 59 |
In patients pre-treated (in the adjuvant and/or metastatic setting) with an anthracycline and a taxane, and who do not need combination CT, single agent capecitabine, vinorelbine or eribulin are the preferred choices. Additional choices include gemcitabine, platinum agents, taxanes, and liposomal anthracyclines. The decision should be individualized and take into account different toxicity profiles, previous exposure, patient preferences, and country availability. | 1 B | 77 |
If given in the adjuvant setting, a taxane can be re-used as 1st line therapy, particularly if there has been at least 1 year of disease-free survival. | 1 A | 92 |
Duration of each regimen and the number of regimens should be tailored to each individual patient. | Expert opinion | 96 |
Usually each regimen (except anthracyclines) should be given until progression of disease or unacceptable toxicity. What is considered unacceptable should be defined together with the patient.
| 1 B | 72 |
OTHER AGENTS |
Bevacizumab combined with a chemotherapy as 1st or 2nd line therapy for MBC provides only a moderate benefit in PFS and no benefit in OS. The absence of known predictive factors for bevacizumab efficacy renders recommendations on its use difficult. Bevacizumab can only therefore be considered as an option in selected cases in these settings and is not recommended after 1st/2nd line. | 1 A | 74 |
SPECIFIC POPULATIONS: TREATMENT OF METASTATIC MALE MBC |
For ER+ Male MBC, which represents the majority of the cases, ET is the preferred option, unless there is concern or proof of endocrine resistance or rapidly progressive disease needing a fast response. | Expert opinion | 100 |
For ER+ Male MBC tamoxifen is the preferred option. | Expert opinion | 83 |
For male patients with MBC who need to receive an AI, a concomitant LHRH agonist or orchidectomy is the preferred option. AI monotherapy may also be considered, with close monitoring of response. Clinical trials are needed in this patient population.
| Expert opinion | 86 |
SPECIFIC SITES OF METASTASES |
BONE METASTASES |
Radiological assessments are required in patients with persistent and localized pain due to bone metastases to determine whether there are impending or actual pathological fractures. If a fracture of a long bone is likely or has occurred, an orthopaedic assessment is required as the treatment of choice may be surgical stabilization, which is generally followed by RT. In the absence of a clear fracture risk, RT is the treatment of choice. | 1 A | 96 |
Neurological symptoms and signs which suggest the possibility of spinal cord compression must be investigated as a matter of urgency. This requires a full radiological assessment of potentially affected area as well as adjacent areas of the spine. MRI is the method of choice. An emergency surgical opinion (neurosurgical or orthopaedic) may be required for surgical decompression. If no decompression/stabilization is feasible, emergency radiotherapy is the treatment of choice and vertebroplasty is also an option. | 1 B | 100 |
BRAIN METASTASES |
Patients with a single or small number of potentially resectable brain metastases should be treated with surgery or radiosurgery. Radiosurgery is also an option for some unresectable brain metastases. | 1 B | 92 |
If surgery/radiosurgery is performed it may be followed by whole brain radiotherapy but this should be discussed in detail with the patient, balancing the longer duration of intracranial disease control and the risk of neurocognitive effects. | 1 B | 72 |
Because patients with HER2+ve MBC and brain metastases can live for several years, consideration of long-term toxicity is important and less toxic local therapy options (e.g. stereotactic RT) should be preferred to whole brain RT, when available and appropriate (e.g. in the setting of a limited number of brain metastases). | 1C | 89 |
LIVER METASTASES |
Prospective randomized clinical trials of local therapy for BC liver metastases are urgently needed, since available evidence comes only from series in highly selected patients. Since there are no randomized data supporting the effect of local therapy on survival, every patient must be informed of this when discussing a potential local therapy technique. Local therapy should only be proposed in very selected cases of good performance status, with limited liver involvement, no extra-hepatic lesions, after adequate systemic therapy has demonstrated control of the disease. Currently, there are no data to select the best technique for the individual patient (surgery, stereotactic RT, intra-hepatic CT…). | Expert opinion | 83 |
MALIGNANT PLEURAL EFFUSIONS |
Malignant pleural effusions require systemic treatment with/without local management. Thoracentesis for diagnosis should be performed if it is likely that this will change clinical management. False negative results are common. Drainage is recommended in patients with symptomatic, clinically significant pleural effusion. Use of an intrapleural catheter or intrapleural administration of talc or drugs (e.g. bleomycin, biological response modifiers) can be helpful. Clinical trials evaluating the best technique are needed. | 2B | 86 |
CHEST WALL AND REGIONAL (NODAL) RECURRENCES |
Due to the high risk of concomitant distant metastases, patients with chest wall or regional (nodal) recurrence should undergo full restaging, including assessment of chest, abdomen and bone. | Expert opinion | 100 |
Chest wall and regional recurrences should be treated with surgical excision when feasible with limited risk of morbidity. | 1 B | 97 |
Locoregional radiotherapy is indicated for patients not previously irradiated. | 1 B | 97 |
For patients previously irradiated, re-irradiation of all or part of the chest wall may be considered in selected cases. | Expert opinion | 97 |
In addition to local therapy (surgery and/or RT), in the absence of distant metastases, the use of systemic therapy (CT, ET and/or anti-HER-2 therapy) should be considered. CT after first local or regional recurrence improves long-term outcomes primarily in ER negative disease. ET in this setting improves long-term outcomes for ER positive disease. The choice of systemic treatment depends on tumor biology, previous treatments, length of disease free interval, and patient-related factors (co-morbidities and preferences).
| 1 B | 95 |
In patients with disease not amenable to radical local treatment, the choice of palliative systemic therapy should be made according to principles previously defined for metastatic BC. These patients may still be considered for palliative local therapy.
| Expert opinion | 97 |
SUPPORTIVE AND PALLIATIVE CARE |
Supportive care allowing safer and more tolerable delivery of appropriate treatments should always be part of the treatment plan. | 1 A | 100 |
Early introduction of expert palliative care, including effective control of pain and other symptoms, should be a priority. | 1 A | 100 |
Access to effective pain treatment (including morphine, which is inexpensive) is necessary for all patients in need of pain relief. | 1 A | 100 |
Optimally, discussions about patient preferences at the end of life should begin early in the course of metastatic disease. However, when active treatment no longer is able to control widespread and life-threatening disease, and the toxicities of remaining options outweigh benefits, physicians and other members of the healthcare team should initiate discussions with the patient (and family members/friends, if the patient agrees) about end-of-life care. | Expert Opinion | 96 |
ABC STATEMENTS FOR LABC (Note: For the purpose of these recommendations, LABC means inoperable, non-metastatic locally advanced breast cancer) |
Before starting any therapy, a core biopsy providing histology and biomarker (ER, PR, HER-2, proliferation/grade) expression is indispensable to guide treatment decisions. | 1 B | 97 |
Since LABC patients have a significant risk of metastatic disease, a full staging workup, including a complete history, physical examination, lab tests and imaging of chest and abdomen (preferably CT) and bone, prior to initiation of systemic therapy is highly recommended. | 1 B | 100 |
PET-CT, if available, may be used (instead of and not on top of CTs and bone scan). | 2 B | 100 |
Systemic therapy (not surgery or RT) should be the initial treatment. If LABC remains inoperable after systemic therapy and eventual radiation, ‘palliative’ mastectomy should not be done, unless the surgery is likely to result in an overall improvement in quality of life.
| Expert opinion | 100 |
A combined treatment modality based on a multidisciplinary approach (systemic therapy, surgery and radiotherapy) is strongly indicated in the vast majority of cases. | 1 A | 100 |
For Triple Negative LABC, Anthracycline- and-taxane-based chemotherapy is recommended as initial treatment. | 1 A | 85 |
For HER-2+ LABC, concurrent taxane and anti-HER-2 therapy is recommended since it increases the rate of pCR. | 1 A | 92 |
For HER-2+ LABC, anthracycline-based chemotherapy should be incorporated in the treatment regimen. | 1 A | 72 |
When an anthracycline is given, it should be administered sequentially with the anti-HER-2 therapy. | 1 A | 87 |
Options for HR+ LABC include an anthracycline- and taxane-based chemotherapy regimen, or endocrine therapy. | 1 A | 85 |
The choice of CT versus ET, as initial treatment, will depend on tumor (grade, biomarker expression) and patient (menopausal status, performance status, comorbidities, preference) considerations. | Expert Opinion | 85 |
Following effective neoadjuvant systemic therapy with or without radiotherapy, surgery will be possible in many patients. This will consist of mastectomy with axillary dissection in the vast majority of cases, but in selected patients with a good response, breast conserving surgery may be possible. | 2 B | 98 |
INFLAMMATORY LABC |
For inflammatory LABC, overall treatment recommendations are similar to those for non-inflammatory LABC, with systemic therapy as first treatment. | 1 B | 93 |
Mastectomy with axillary dissection is recommended in almost all cases, even when there is good response to primary systemic therapy. | I B | 95 |
Immediate reconstruction is generally not recommended in patients with inflammatory LABC. | Expert opinion | 95 |
Loco-regional radiotherapy (chest wall and lymph nodes) is required, even when a pCR is achieved with systemic therapy. | 1 B | 98 |