OBJECTIVE: The complexity of metastatic breast cancer, its rapidly evolving treatment, and the changing trajectory toward long-term survivorship create unique challenges for the provision of supportive care. The experiences of health professionals enacting supportive care in contexts of those living long-term with incurable cancer have received limited research attention. This qualitative study aimed to gain further insight into health professionals\' experiences of supportive care in this context.
METHODS: Semi-structured interviews were conducted via phone and online with 25 health and community-care professionals who support people living with metastatic breast cancer in Australia. A mix of sampling strategies was used. Thematic analysis was undertaken. Findings were interpreted through an ethics of care lens.
RESULTS: Three key themes were identified. First, participants experienced supportive care as highly relational. Second, they encountered numerous moral and ethical dilemmas in enacting supportive care. Finally, enacting supportive care was complicated by fragmented and sporadic provision in a system in which supportive care is differentially valued across professions and settings.
CONCLUSIONS: Findings draw attention to complexities in enacting supportive care in the context of metastatic breast cancer, with implications to patients and professionals. To improve the quality of care provided to patients and minimise the risk of professional burnout, greater attention is needed in supportive care guidelines to the ethical, moral, and emotional complexities experienced by professionals in this context.
CONCLUSIONS: People living with metastatic breast cancer are a growing proportion of cancer survivors. The knowledge gained through this study may help professionals to better meet the supportive care needs of people living with metastatic breast cancer, a treatable but not curable condition.

BACKGROUND: Approximately, 55% of breast carcinomas are reported to be HER-2 low breast carcinomas. Trastuzumab-Deruxtecan is a new FDA-approved targeted therapy for HER-2 low metastatic breast carcinomas, making it essential that all efforts are made to identify these tumors in specimens submitted for pathologic examination. Cytology specimens are often the first and only modality of this assessment due to the ease of specimen procurement. This study aimed to determine the variability in HER-2 immunostaining interpretation among observers using cytologic specimens from metastatic sites.
METHODS: A pathology database search was made to identify metastatic breast carcinoma reported in cytology specimens. A manual search was then done to identify cases of HER-2 low category, H&E cell block and HER-2 neu immunostain slides were retrieved for a total of 50 cases. Reviewer #1 and #2 independently interpreted HER-2 immunostain of all 50 cases. Only discordant cases were sent for reviewer-3 interpretation. All three were blinded by the metastatic site, and original HER-2 interpretation.
RESULTS: Of 50 cases, 11 cases (22%) were reported as concordant scores between reviewer #1 and reviewer #2 but had a discordant original IHC report. Additionally, 4 cases (8%) had discordant reporting of HER2 IHC stain between reviewer #1 and reviewer #2 making a total of 15 cases (30%) with overall discordant results.
CONCLUSIONS: This study highlights the interobserver variability of HER-2 immunostain interpretation for HER-2 low category of breast carcinomas. We recommend the need for more robust laboratory techniques including molecular for uniform identification of these unique targetable metastatic breast carcinoma groups.

UNASSIGNED: Eribulin prolongs overall survival (OS) of patients with human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer (MBC), particularly in later chemotherapy (ChT) treatment. However, the health-related quality of life (HRQoL) and efficacy of first or second-line therapy in eribulin-treated patients remain unknown. Using eribulin in the first- or second-line may demonstrate the non-inferiority of HRQoL compared to S-1, an oral 5-fluorouracil derivative, while maintaining OS.
UNASSIGNED: This randomised, controlled, open-label, phase III trial was conducted at 50 hospitals in Japan. Patients were enrolled from June 2016 and October 2019. Patients with HER2-negative MBC once under or no previous ChT were randomly assigned (1:1) to receive eribulin or S-1. HRQoL was assessed using the European Organization for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire-Core 30 (QLQ-C30) every six weeks until week 24 and every nine weeks until week 42. The primary endpoint was the deterioration defined as more than 10 points worsening of the general health score of QLQ-C30 or death within one year after randomisation. The secondary endpoints included OS. (Trial ID: UMIN000021398).
UNASSIGNED: Three hundred and two patients were enrolled, with 152 and 148 assigned to the eribulin and S-1 groups, respectively. The questionnaire compliance rate was 85.6%. Risk difference of global health status deterioration through one year was -0.66% (95% CI: -12.47-11.16; non-inferiority P = 0.077) for eribulin compared to S-1 groups. Median time to first deterioration for global health status score was 5.64 (95% CI: 3.51-8.00) and 5.28 months (95% CI: 3.28-7.80) in the eribulin and S-1 groups, respectively. The median OS was 34.7 and 27.8 months, (HR: 0.72, 95% CI: 0.54-0.96; P = 0.026); the median progression-free survival was 7.57 and 6.75 months in the eribulin and S-1 groups, (HR: 0.88, 95% CI: 0.67-1.16; P = 0.35), respectively. No new adverse events occurred.
UNASSIGNED: The time of the first clinical deterioration was similar between the two groups and OS significantly increased in eribulin-treated patients.
UNASSIGNED: This study was funded by CSPOR-BC and Eisai CO., Ltd.

BACKGROUND: Timely incorporation of palliative care (PC) during treatment of patients with metastatic cancers can improve symptom management and quality of life. Older age has been associated with lower PC use in patients with cancer. The frequency by which older patients with metastatic breast cancer (MBC) receive PC is unknown. The goal of this study was to use the National Cancer Database (NCDB) to describe national patterns in PC use in older adults over 75 years of age with MBC.
METHODS: Females with a diagnosis of MBC at age ≥ 75 years from 2010 to 2019 were identified from the NCDB. The NCDB defined PC as any surgery, radiation, systemic therapy, and/or pain management that was administered with noncurative intent. Multivariable logistic regression models were performed to assess associations between PC receipt and study covariates.
RESULTS: Of 17,325 eligible participants included in the final analysis, 39.4% were 75-79, 30.1% 80-84, and 30.4% ≥ 85 years of age. Overall, 22.1% (N = 3824) of patients utilized PC, of whom 14.3% received pain management, while the remainder received palliative intent surgery, radiation, and/or systemic therapy. Patients who were Hispanic were less likely to receive zzPC (AOR: 0.62, 95% CI: 0.48-0.79), p < 0.001). In the overall population, the use of PC increased from 19.2% in 2010 to 25.3% in 2019, though this was primarily driven by the statistically significant increase in the 75-79 age group (19.9% to 28.1%, p = 0.001).
CONCLUSIONS: In this patient population from the NCDB, we observed an increase in PC utilization over the last decade in older adults with MBC, though the increase was lowest in patients who were 85 years and older. Barriers to PC in older adults with cancer need to be further explored.

Surgery for the management metastatic breast cancer has traditionally been considered a palliative procedure. However, some retrospective publications indicated that there may be a survival benefit to surgery in the presence of metastatic disease. Recent randomized trials will be reviewed for both management of the intact primary tumor in de novo breast cancer and systemic secondary metastases.

Background: Metastatic breast cancer is associated with a poor prognosis and therefore, innovative therapies are urgently needed. Here, we report on the results of a Phase I-II study using DeltaRex-G for chemotherapy resistant metastatic carcinoma of breast. Patients and Methods: Endpoints: Dose limiting toxicity; Antitumor activity. Eligibility: ≥18 years of age, pathologic diagnosis of breast carcinoma, adequate hematologic and organ function. Treatment: Dose escalation of DeltaRex-G 1-4 x 1011cfu intravenously thrice weekly x 4 weeks with 2-week rest period. Treatment cycles repeated if there is ≤ Grade 1 toxicity until disease progression or unacceptable toxicity. Safety: NCI CTCAE v3 for adverse events reporting, vector related testing. Efficacy: RECIST v1.0, International PET criteria and Choi criteria for response, progression free and overall survival. Results: Twenty patients received escalating doses of DeltaRex-G from 1 × 1011 cfu to 4 × 1011 cfu thrice weekly for 4 weeks with a 2-week rest period. Safety: ≥ Grade 3 treatment-related adverse event: pruritic rash (n = 1), no dose limiting toxicity, no replication-competent retrovirus, nor vector-neutralizing antibodies detected. No vector DNA integration was observed in peripheral blood lymphocytes evaluated. Efficacy: by RECIST v1.0: 13 stable disease, 4 progressive disease; tumor control rate 76%; by PET and Choi Criteria: 3 partial responses, 11 stable disease, 3 progressive disease; tumor control rate 82%. Combined median progression free survival by RECIST v1.0, 3.0 months; combined median overall survival, 20 months; 1-year overall survival rate 83% for Dose Level IV. Biopsy of residual tumor in a participant showed abundant CD8+ killer T-cells and CD45+ macrophages suggesting an innate immune response. Two patients with pure bone metastases had >12-month progression free survival and overall survival and are alive 12 years from the start of DeltaRex-G therapy. These patients further received DeltaRex-G + DeltaVax for 6 months. Conclusion: Taken together, these data indicate that 1) DeltaRex-G has a distinctively high level of safety and exhibits anti-cancer activity, 2) PET/Choi provide a higher level of sensitivity in detecting early signs of tumor response to DeltaRex-G, 3) DeltaRex-G induced 12- year survival in 2 patients with pure bone metastases who subsequently received DeltaVax immunotherapy, and 4) DeltaRex-G may prove to be a biochemical and/or immune modulator when combined with other cancer therapy/immunotherapy.

Women that present to the clinic with established breast cancer metastases have limited treatment options. Yet, the majority of preclinical studies are actually not directed at developing treatment regimens for established metastatic disease. In this review we will discuss the current state of preclinical macro-metastatic breast cancer models, including, but not limited to syngeneic GEMM, PDX and xenografts. Challenges within these models which are often overlooked include fluorophore-immunogenic neoantigens, differences in experimental vs spontaneous metastasis and tumor heterogeneity. Furthermore, due to cell plasticity in the tumor immune microenvironment (TIME) of the metastatic landscape, the treatment efficacy of newly approved immune checkpoint blockade (ICB) may differ in metastatic sites as compared to primary localized tumors.

UNASSIGNED: Cancer-related fatigue (CRF) occurs in nearly all patients with metastatic breast cancer (MBC).
UNASSIGNED: This real-world analysis aimed to describe the prevalence and importance of fatigue in patients with MBC within 3 months of treatment with single-agent taxane-based chemotherapy during the timeframe of 2020-2022 in the United States and Europe. It was also conducted to assess whether there was a difference in relapsed patients compared to patients diagnosed de novo.
UNASSIGNED: Electronic health records were analyzed from approximately 150 million patients to identify patients with MBC who underwent taxane treatment.
UNASSIGNED: In 2021, 50,490 patients had MBC, of whom 16,170 were diagnosed de novo and 34,330 experienced relapse. The proportion of patients undergoing taxane-based chemotherapy was 7.5% (n = 1220) and 13.4% (n = 4590), respectively, and the prevalence of any fatigue and CRF was similar between the groups (24.6% versus 25.7% and 6.6% versus 5.4%, respectively).
UNASSIGNED: At least one in four patients with MBC undergoing taxane-based treatment will experience fatigue. This highlights the importance of validating screening tools to identify CRF, which is necessary to advance clinical trials aimed at investigating treatment strategies to improve patient-centered outcomes for fatigue.

BACKGROUND: Metastatic breast cancer originating in the gastrointestinal tract is a rare occurrence. The limited number of cases has resulted in incomplete understanding of the disease, making it challenging to differentiate from primary breast cancer. While clinical history and immunohistochemical studies can aid in distinguishing between the two, the management principles and pathogenesis of gastrointestinal metastatic breast cancer remain controversial. The scarcity of data has hampered comprehensive knowledge. Our objective is to shed light on this rare disease through our case study.
METHODS: Here, we report a case of breast metastasis from gastric cancer in a 43-year-old woman. This patient was admitted to our hospital with complaints of discomfort in the upper and middle abdomen persisting for two months, as well as black stools for over ten days. She underwent radical distal gastrectomy for gastric cancer, followed by postoperative chemotherapy. Three years later, the patient developed bilateral breast nodules. Imaging studies indicated a high probability of malignancy. She subsequently underwent a right modified radical mastectomy and excision of a left breast mass. Postoperative pathology revealed the right breast tumor was consistent with primary gastric cancer.
CONCLUSIONS: We present a case of breast metastasis from gastric cancer to contribute to the limited foundation of research into this rare disease.

We investigated the usefulness of a metastatic (secondary) breast cancer Infographics designed to enhance knowledge about symptoms of metastatic breast cancer in women diagnosed with breast cancer. Women with a primary or metastatic diagnosis of breast cancer who had not been in receipt of the Infographics previously, were sent the Infographics and asked to complete a questionnaire measuring their views of the usefulness of the Infographics in a number of domains. They were also asked to complete questionnaires on, anxiety and depression, coping, emotion regulation strategies and perceived cognitive functioning. Results showed that women advocated the use of the Infographics in medical and health care settings, as well as its ability in equipping themwith the relevant knowledge on signs of recurrence, its benefits in empowering control and reducing fears and uncertainties regarding metastatic breast cancer. Exploratory analysis showed that individual differences in trait vulnerability to anxiety and in emotion regulation strategies modulated women\'s responses suggesting the use of tailored approaches in the communication of the Infographics with patients. Our results point to the overall benefits of the Infographics in a number of domains. Implications for applications in healthcare settings are discussed.