Due to a steady decline in breast cancer mortality rates and increasing longevity, about 176 556 Australians diagnosed with breast cancer in the preceding 29 years were alive in 2010.1 About 16 000 new cases of breast cancer are expected to be diagnosed in 2016, of which most women will be cured.2 To achieve the current 90% 5-year disease-free survival, a variety of treatments are employed, including surgery, radiotherapy, chemotherapy, biologic therapy and endocrine therapy. However, as a result of these treatments, a large cohort of women (and some men) is living with the after-effects of either the diagnosis of or treatment for breast cancer. Some of these patients may have significant supportive care needs for many years after their diagnosis, and a range of clinicians may be involved in their care.3 Some patients with metastatic breast cancer also live for many years and may share these supportive care needs.
Supportive care of these patients aims to alleviate the burden of cancer treatment or of cancer itself, from diagnosis to the end of life, irrespective of whether the cancer has recurred or not.3 The physical and psychological morbidities associated with treatment have long term impacts on role functioning at work and at home. Good supportive care can aid in the management of a range of problems that are experienced after a diagnosis of breast cancer (Box).
Many health care practitioners play a part in the follow-up care of women with breast cancer, including medical and radiation oncologists, surgeons, general practitioners, psychologists, psychiatrists breast care nurses, general practice nurses, allied health practitioners (eg, physiotherapists, dietitians, pharmacists) and complementary practitioners. Survivorship care plans are designed to document who of these professionals is responsible for aspects of follow-up care, to help identify and manage supportive care needs of affected women. To date, no single follow-up strategy has been identified that suits the needs of all women, or improves their survival, so flexibility is key. With such a variety of treatment options and modalities available, good communication between practitioners should be maintained throughout the follow-up period.
Here, we briefly describe several problems that commonly affect women diagnosed with early stage breast cancer, along with management strategies pertinent to both generalist and specialist clinicians.
Symptoms due to oestrogen suppression
Tamoxifen has been a standard post-operative endocrine therapy for pre-menopausal oestrogen receptor positive breast cancer. However, recent results from randomised trials4,5 have led to changes in recommendations for pre-menopausal women considered to be at higher risk of cancer recurrence, determined on the basis of clinical-pathologic factors. Young women may now be treated with a combination of ovarian function suppression by 4-weekly gonadotropin-releasing hormone (GnRH) agonist injections plus an oral aromatase inhibitor, resulting in ultralow oestrogen levels over several years. Laparoscopic bilateral oophorectomy is a non-reversible alternative to GnRH injections. Ovarian function suppression, initiated prior to and continued during chemotherapy, may also be recommended in pre-menopausal oestrogen receptor negative cancer, to reduce the risk of premature menopause and improve future fertility prospects.6 Management of the effects of endocrine therapy is particularly important given accumulating data supporting treatment for 10 years or more after diagnosis.7
Adding treatment that suppresses ovarian function to oral endocrine therapy increases the frequency of several toxicities including vasomotor symptoms, insomnia, depression, vaginal dryness, loss of libido, bone density loss and musculoskeletal symptoms.6 Hypertension and glucose intolerance and/or diabetes are also more frequent in women undergoing ovarian suppression; therefore, young women rendered post-menopausal for years by GnRH injections should be assessed for these conditions.
Ovarian suppression and use of aromatase inhibitors result in bone density loss, and women should be advised to receive adequate dietary calcium, vitamin D supplementation if they are at risk of deficiency, avoid smoking, and participate in regular weight-bearing exercise. Among pre-menopausal women assigned to receive ovarian suppression plus an aromatase inhibitor for 5 years, low bone density (T score < −1.0) was reported in 38.6%, including 13.2% with osteoporosis (T score < −2.5).5 Women undergoing ovarian suppression and/or aromatase inhibitor therapy should undergo bone density monitoring. This is rebatable by Medicare for women aged under 45 years with amenorrhea for at least 6 months. Breast cancer treatment-induced bone density loss in pre-menopausal woman can be prevented with a 6-monthly dose of an intravenous bisphosphonate (zoledronic acid).8 While this is not currently an approved or Pharmaceutical Benefits Scheme-subsidised indication in Australia, generic formulations are relatively inexpensive.
Vasomotor symptoms are common in women treated for breast cancer, and hormone replacement therapy is contraindicated. Lifestyle measures including weight loss, prevention of weight gain, and exercise are recommended, although the evidence for reducing vasomotor symptoms is weak.9 Effective non-oestrogenic pharmacological therapies include selective serotonin reuptake inhibitors and serotonin–norepinephrine reuptake inhibitors, GABA analogues (gabapentin, pregabalin) and clonidine.10 Among selective serotonin reuptake inhibitors, paroxetine and fluoxetine are best avoided in women taking tamoxifen, owing to potent inhibition of tamoxifen metabolism.11 Cognitive behavioural therapy and hypnosis can reduce vasomotor symptoms, while acupuncture and mindfulness-based stress reduction have also shown promise.10
Aromatase inhibitor musculoskeletal syndrome
Most women diagnosed with early breast cancer have hormone receptor positive disease and most will benefit from at least 5 years of adjuvant endocrine treatment.4 Aromatase inhibitors (AIs) lead to superior disease-free survival and in some instances overall survival compared with tamoxifen. As a result, AI use in post-menopausal women has been increasing and in 2008 overtook that of tamoxifen.12
Arthralgia and other joint-related symptoms are common in menopausal women but are also a significant toxicity of AIs and the most common cause of treatment discontinuation.13 Lintermans and colleagues described a syndrome of arthritis, arthralgia, myalgia, musculoskeletal pain, carpal tunnel syndrome, joint stiffness and/or paraesthesia associated with AIs, now commonly referred to as aromatase inhibitor musculoskeletal syndrome (AIMSS).14
Clinical trials of adjuvant AIs report AIMSS in up to 36% of patients; however, community-based series report considerably higher rates. In a survey of Australian women taking AIs, 82% of women reported AIMSS.15 Any joint can be affected but hands, hips, feet and knees were most commonly involved. The syndrome typically presents within 8 weeks of commencement of an AI but may have a later presentation with slow worsening of symptoms over 6–24 months. In the Australian women surveyed, a third had considered stopping AI therapy, and 18% had discontinued because of AIMSS. Reduced adherence has been associated with an increased risk of relapse.16
Despite more than a decade of research into interventions for AIMSS, there are still limited data supporting effective interventions. In the Australian survey, women found anti-inflammatories, paracetamol and yoga most beneficial for treating AIMSS.15 Studies have been unable to demonstrate a benefit from duloxetine, testosterone, glucosamine, chondroitin sulfate, fish oil, antidepressants, anticonvulsants, bisphosphonates, vitamin D supplements or acupuncture.17 Prescription anti-arthralgia medication use does not appear to reduce AI discontinuation.18 The most compelling current data support exercise in previously inactive women.19 Other options to improve tolerance and reduce discontinuation include switching to tamoxifen or trialling an alternative AI.20
Sexual dysfunction
The impact of cancer and its treatment on sexuality is increasingly recognised. Deleterious changes in sexual function are experienced by 50–70% of women after breast cancer and persist long after diagnosis.21 Physical sexual side effects of cancer and its treatment may include vaginal atrophy (dryness or tightness), decreased desire or motivation, pain during penetration, absent or muted orgasms, and urinary dysfunction. It is not unusual for women to experience poor body image and changes to their sense of femininity, which contribute to lower interest in sex. With deteriorating sexual function, anxiety and depression can increase in cancer survivors and their partners. This causes overall quality of life to decline, rendering sexual difficulties one of the most distressing survivorship concerns.22
Both pharmacological and psychosocial interventions can help manage post-treatment changes to sexuality.21 Non-hormonal options include use of a pH-balanced vaginal gel21 or lignocaine gel23 to reduce dyspareunia and vaginal dryness, and allow comfortable resumption of intercourse in women entering menopause after chemotherapy or endocrine treatment. If non-hormonal strategies are ineffective, vaginal oestrogen can be considered after discussion about the potential risks and benefits, in consultation with the treating oncologist. Despite systemic absorption of these preparations having the potential to stimulate oestrogen-dependent breast cancer, vaginal oestrogen has not been shown to increase the rate of breast cancer recurrence.24 Sexual dysfunction is worse with AIs than with tamoxifen, so switching endocrine therapy can be an effective treatment strategy. While pharmacological interventions address physical sexual dysfunctions, psychosocial interventions have led to improved sexual and relationship satisfaction.21 The core components of effective psychosocial interventions to improve sexual function include psychoeducation (empowerment-oriented, evidence-based education), coping and communication skills training, mindfulness training and sensate focusing.21
Despite the availability of pharmacological and psychosocial interventions, many women do not discuss sexual concerns with their health professionals and, consequently, do not access effective interventions. Availability of internet-based interventions may help overcome barriers to accessing care. An Australian randomised trial, the Rekindle study, is assessing the feasibility of delivering psychoeducational support to cancer survivors and their partners using an internet-based approach.25 Women can self-refer and register on the study website (www.rekindleonline.org.au).
Alopecia
Hair loss can be a very distressing side effect for patients undergoing adjuvant chemotherapy and sometimes leads to patients declining treatment. It can be a major psychological issue for some patients, both male and female, and may attract unwanted attention, breaching privacy.26 Chemotherapy drugs can cause atrophy and loss of the hair root bulb, resulting in total alopecia or partial atrophy of the hair shaft, making it more susceptible to trauma from normal hair care. Permanent partial alopecia sometimes occurs after current standard chemotherapy for breast cancer.27
Scalp cooling is an effective method of minimising chemotherapy-induced alopecia. Reduced scalp temperature reduces drug penetration to the hair follicle via vasoconstriction. This reduces the cellular uptake of the drug and the degree of hair loss. Cooling is applied by either a gel cap or a coolant system before, during and after the chemotherapy infusion. Effectiveness varies depending on the dose, schedule, agent used, duration of cooling, age, hair type and temperature of the scalp.28 Breast cancer studies do not indicate a higher rate of scalp metastases or altered survival.29
Close coordination between medical and nursing staff and hair care professionals is required for effective implementation, with increasing availability in Australia. Patient information can be found at https://mns.org.au/home/our-services/list-of-services/cancer-care/scalp-cooling-system.
Fear of cancer recurrence
Fear of cancer recurrence (FCR) is commonly defined as fear of cancer returning or progressing in the same organ or another body part.30 Up to 70% of cancer survivors experience moderate-to-severe FCR, and help with managing FCR is a frequently cited unmet need.31 Younger early stage breast cancer patients and those with more physical symptoms and greater psychological distress appear particularly vulnerable to experiencing FCR.32 Further, FCR is relatively stable over time and appears to have little association with objective recurrence risk.32 Severe FCR may impair quality of life and increase psychological distress.31 It is also associated with greater health care usage, including increased unscheduled GP and oncologist visits and, conversely, lower breast surveillance imaging rates.33
Identification and management of FCR should take a multidisciplinary approach, with primary care providers as a key point of contact. Routine screening for FCR is recommended at the completion of primary treatment and during follow-up consultations with GPs and specialists across all points in the diagnosis, treatment and survivorship trajectory.34 Used in conjunction with patient and carer reports, self-report instruments can assist in clarifying the severity and impact of FCR on an individual’s social, emotional and occupational functioning.35 All cancer survivors should be provided with information on FCR and education on recurrence rates and their interpretation. Proposed components of a clinical definition of FCR include (i) high levels of preoccupation, worry, rumination or intrusive thoughts; (ii) maladaptive coping; (iii) functional impairments; (iv) excessive distress; and (v) difficulties making plans for the future.36 Referral to a psychologist is recommended if FCR is associated with one or more of these five items, with psychiatrist referral if medical management is indicated.37 Several psychological interventions based on cognitive behavioural models are currently being trialled (eg, Conquer Fear).38 Until interventions with strong evidence are available, practitioners’ experience in cancer and survivorship issues should guide referral to psychosocial services.
Pain
Pain is a common and feared complication of cancer; 53% of people at any stage of disease experience pain.39 Further, 25–60% of breast cancer survivors have persistent pain after treatment, including breast, chest wall, axillary and lymphoedema-related pain from surgery and radiotherapy; peripheral neuropathy from chemotherapy; and musculoskeletal symptoms from AI use.40 Poor pain control can interfere with quality of life, function, mood, sleep and relationships, and cause caregiver distress. The key principles of pain management apply in people with active cancer and in cancer survivors: screen for pain; conduct a comprehensive assessment to determine the mechanism and cause; treat the cause; treat associated distress; and give evidence-based therapies.
Management of pain after a diagnosis of breast cancer includes exercise, appropriate referral (eg, to a lymphoedema therapist), and analgesics such as paracetamol or non-steroidal anti-inflammatory agents. For patients with neuropathic pain, duloxetine may be beneficial.40 The role of opioids in this population is under question due to long term adverse effects and lack of evidence for benefit. A multidisciplinary approach with non-pharmacological strategies should be considered in this group.41
Self-management strategies can enhance the achievement of pain-related goals and sense of control.42,43 Each person has a different goal for what is an acceptable pain score. A patient-held pain management plan can be negotiated between health professionals and patients, allowing patients to be more involved in their own care. For patients with chronic pain after breast cancer treatment, the goal may be to live well despite pain, rather than to completely eliminate it.
Cognitive impairment
Up to 70% of women complain of cognitive impairment or dysfunction after breast cancer diagnosis and treatment,44 with distressing effects on their quality of life and functional abilities. Increasing evidence suggests that cancer itself, in addition to anti-cancer treatments, is responsible for deteriorations in cognitive function.44 Measurement of cognitive changes includes neuropsychological testing, functional assessments of everyday activities and self-reported assessment; however, objective and subjective measures are not well correlated.
The mechanism for cognitive deterioration is likely multifactorial and may include direct neurotoxicity, immune dysregulation, oxidative damage, changes in sex hormone levels, microvascular clots or genetic predisposition.44 Given the strong association between self-reported cognitive impairment, sleep disturbance, fatigue, and anxiety and depression, it is important that women are screened and treated for these problems where they are present.
While it is difficult to predict who is at greatest risk of cognitive impairment and to prevent it occurring, there is growing evidence that cognitive rehabilitation interventions can alleviate these symptoms. Computerised cognitive training and brief cognitive behavioural treatments improve a range of cognitive outcomes including self-reported cognitive impairment, speed of information processing, cognitive flexibility, delayed memory and verbal fluency.44,45 Women should be informed that cognitive changes are a possibility and that spontaneous recovery is likely within the first 6–12 months after treatment. Patients experiencing prolonged or profound cognitive changes could be referred initially for cognitive rehabilitation using available online programs such as BrainHQ (www.brainhq.com), followed by cognitive behavioural treatments in those with persistent symptoms.
Lack of exercise
Evidence strongly supports the benefits of exercise as a form of medical treatment after a breast cancer diagnosis. Exercise plays an important role in treatment-related symptom control, reducing the severity and number of treatment-related side effects and symptoms (including sleep disturbances, cognitive impairment, pain, fatigue and lymphoedema), as well as improving function and fitness during and after treatment.46 Exercise during and beyond treatment for breast cancer also contributes to improved self-confidence, self-image, self-efficacy and self-esteem, and reduced depression and anxiety.46 Further, high quality cohort studies have shown that women who exercise regularly during and after breast cancer treatment experience a 20–40% reduction in all-cause mortality, disease recurrence and breast cancer deaths, independent of other prognostic factors including stage of disease and being overweight or obese.47
In Australia, despite availability of clinic- and community-based breast cancer-specific exercise programs such as YWCA Encore (http://www.ywcaencore.org.au), exercise does not form part of the standard breast cancer care provided for the majority of women. Yet the need is great, with most breast cancer survivors being classified as either sedentary or insufficiently active during treatment. Women commonly reduce their exercise levels after their diagnosis, rather than initiate or maintain an exercise regime.48 Therefore, the question is not whether such women should be active during and after their treatment, but how they become and stay sufficiently active to live healthy lives beyond their breast cancer experience.
Ideally, exercise will not only prevent declines in function, but will maintain or increase function. As a minimum, each exercise session should be of moderate intensity (inducing shortness of breath) for at least 10 minutes in duration, including both aerobic and resistance-based exercise. Current guidelines suggest increasing exercise duration, frequency and intensity, up to at least 150 minutes of exercise each week.49 An exercise prescription from a doctor or other qualified health professional (such as an exercise physiologist) is most effective when combined with behaviour change strategies, taking into account exercise preferences, barriers and motivators.50
Conclusion
Identification and management of the supportive care needs of women with a past diagnosis of breast cancer is relevant to both breast cancer specialists and a wide variety of clinicians and allied health practitioners. Good supportive care can not only improve patients’ quality of life but also their survival outcomes.
Box –
Supportive care needs experienced by women with breast cancer
- Endocrine treatment-related morbidity such as hot flushes, arthralgia, osteoporosis and genitourinary symptoms
- Physical and psychological impact on sexual function
- Alopecia
- Fear of cancer recurrence
- Pain — eg, chest wall, breast, axilla and musculoskeletal
- Impaired memory, concentration and cognition
- Deconditioning and suboptimal exercise levels