EvidenceHR-positive / HER2-negative breast cancer

NCCN is the source of the category grades on the triple-negative breast cancer page and the first major guideline to place an antibody-drug conjugate first line for the disease.

Answers the two questions that hung over adjuvant olaparib, durability and late leukaemia, in its favour; the remaining question is whether carriers who also received pembrolizumab or capecitabine, whom the trial did not study, get the same benefit.

Chinese patients in the trial saw the same pattern as the global population: a clear progression-free survival gain, no proven survival gain, and a different rather than heavier side-effect burden, with mouth and eye toxicity in nearly half. It supports use of datopotamab deruxtecan in this setting in China but does not resolve the global trial's missing survival benefit.

Platinum and immunotherapy are now consensus for early triple-negative disease; the open votes have moved to who can safely receive less.

This is the number behind almost every statement about how much cancer there is. It shows the burden shifting towards low- and middle-income countries and towards older populations, which is why prevention, screening and affordable treatment in those settings decide the global trend. OnCo's country and prevalence pages draw on the same GLOBOCAN release.

Patients with hormone-receptor-positive metastatic breast cancer that has stopped responding to endocrine therapy can be offered trastuzumab deruxtecan as their first chemotherapy-type treatment if the tumour shows any HER2 staining, rather than waiting until after conventional chemotherapy. Whether to use it before or after chemotherapy is now a choice, since overall survival was not shown to differ and the drug carries a risk of lung inflammation.

This is the European standard the UK page for triple-negative breast cancer is compared against; NICE guidance covers the same ground with a narrower set of funded drugs.

Ribociclib is a second adjuvant CDK4/6 option, and the only one with data in node-negative stage II disease. Roughly 3 in 100 patients avoid a relapse or death at three years, so the decision depends heavily on individual risk, tolerance of a three-year oral drug, and cost. Whether the benefit persists after treatment ends, as it did with abemaciclib, needs longer follow-up.

This series is the standard reference for US cancer numbers and the source of most headlines about cancer in younger adults. The gap between falling mortality and rising incidence is the argument for both continued treatment advances and stronger prevention and screening.

For hormone-receptor-positive metastatic breast cancer that has already had chemotherapy, Dato-DXd controls the disease for longer with fewer severe side effects than chemotherapy, but does not help patients live longer, so it is not a standard option here. The result is a reminder that progression-free survival is a surrogate; regulators and clinicians should wait for survival data before adopting an ADC in a setting where later therapies are effective.

Screening programmes short of radiologists can read this as prospective evidence that a well-validated AI reader can take the second reader's seat without lowering cancer detection. It is a paired-reader study in one hospital, not a randomised trial, so MASAI and real-world follow-up carry the argument further.

AI can take over one reader's work in double-reading screening programmes while finding more cancers. Whether the extra cancers found are ones that would have harmed women, and whether interval cancers fall, is the question the trial's primary endpoint will answer.

St Gallen is where de-escalation questions in triple-negative disease (who needs the full KEYNOTE-522 regimen, who can skip adjuvant pembrolizumab) are first put to a vote; the 2023 panel framed intensity and duration as the central problem.

Confirms that the TROP2 antibody-drug conjugates are given without a TROP2 test and that PD-L1 remains the one selection assay in metastatic triple-negative disease, which is why assay harmonisation matters.

Patients whose breast cancer was previously called HER2-negative may now be eligible for an effective HER2-directed drug if their tumour has even low-level HER2 staining, so pathology reports must now distinguish HER2-low (1+ or 2+/ISH-negative) from HER2-zero. This applies to metastatic disease after at least one line of chemotherapy; it does not mean these patients benefit from trastuzumab or other older HER2 drugs.

The survival result that moved adjuvant olaparib from a disease-free survival approval to an undisputed standard, and the reason germline testing at diagnosis of triple-negative breast cancer is now a treatment decision rather than a family history exercise.

The external validation the 2017 paper asked for; it is why residual cancer burden is reported in UK and European pathology and used as a trial entry criterion rather than an MD Anderson curiosity.

There is no safe level of alcohol for cancer risk, and the risk is highest for cancers of the mouth, throat, oesophagus, liver, bowel and breast. Public awareness is low; most people do not know alcohol causes breast cancer. Warning labels and minimum pricing are the policy levers being debated.

HER2-low is a drug eligibility label, not a biological subtype, in triple-negative disease; because a third of patients qualify for trastuzumab deruxtecan on a score pathologists disagree about, re-scoring and digital assistance for HER2 0 versus 1+ is a practical gap.

The document that made immunotherapy, PARP inhibition and the first antibody-drug conjugate the European standard for metastatic triple-negative disease; every later first-line change is an amendment to it.

Everyone with HER2-negative early breast cancer that meets high-risk criteria should be offered germline BRCA testing, because a positive result now changes treatment: a year of olaparib after chemotherapy reduces relapse and death. It does not apply to low-risk tumours, HER2-positive disease, or somatic-only BRCA mutations.

This report marked the shift of the global cancer burden towards breast cancer and towards lower-income countries, and it is the baseline most 2020s policy documents cite. The GLOBOCAN 2022 release has since updated the totals.

India's cancer problem is a late-diagnosis problem as much as a treatment problem: the same cancers that dominate (oral, cervical, breast) are the ones screening and vaccination can prevent or catch early. The numbers set the priorities of the National Cancer Grid, PM-JAY oncology packages and the national screening programme.

Sets the surgical and systemic rules for the one in nine to one in six triple-negative patients who carry a germline BRCA variant (11 to 17 percent by cohort); the adjuvant gap it named was filled by OlympiA the following year.

Women with hormone-receptor-positive, HER2-negative breast cancer that has spread to lymph nodes and has other high-risk features can now be offered two years of abemaciclib alongside their hormone therapy, with a durable reduction in relapse. It does not apply to node-negative or low-risk disease, and the diarrhoea and cost are real trade-offs to discuss.

Re-biopsy and re-sequencing at relapse can find repair defects and a higher mutation burden that the primary did not show, which matters for PARP inhibitor and immunotherapy eligibility in metastatic TNBC.

CONCORD is the evidence base for national cancer plans and for the statement that where you live changes your chance of surviving cancer. Its country tables are the benchmark health systems use to judge early diagnosis and treatment access.

This was the most cited description of the global cancer burden until the 2020 release and is the reference behind many national cancer plans of the late 2010s. Its country-level comparisons showed where prevention, such as HPV and hepatitis B vaccination and tobacco control, would have the largest effect.

Complementary approaches used alongside treatment are one thing; substituting an alternative therapy for surgery, chemotherapy, radiotherapy or hormone therapy in a curable cancer is associated with a large increase in the risk of dying. The finding is the evidence base for offering complementary therapies inside cancer centres and for asking every patient, without judgement, what else they are using.

Established that residual disease after neoadjuvant chemotherapy is a treatable state, the principle behind OlympiA and the post-neoadjuvant antibody-drug conjugate trials; capecitabine remains the option for residual triple-negative disease without a BRCA variant in ESMO, NCCN and UK practice.

Turned residual disease from yes or no into a graded score; RCB II and III are now the entry criteria for post-neoadjuvant trials (ASCENT-05, TROPION-Breast03) and the population the ctDNA-guided idea targets.

Scalp cooling works, especially for taxane-based regimens, and is safe. The question moved from whether to how to make it available: device time in the chemotherapy chair, staff training, and who pays.

Maintaining a healthy weight is now established cancer prevention for over a dozen cancer types. For clinicians and policymakers, obesity belongs alongside tobacco and alcohol in prevention strategy. Whether intentional weight loss in adulthood reverses risk is still being studied, including in trials of GLP-1 drugs.

For women at raised risk, a 5-year course of tamoxifen offers long-lasting protection against the commonest kind of breast cancer. Uptake is low because of side effects and fear of rare serious harms; low-dose tamoxifen (TAM-01) is now being tested to improve the balance. It has not been shown to save lives.

A Mediterranean dietary pattern rich in olive oil may lower breast cancer risk, and it is safe and good for the heart anyway. The evidence is suggestive, not definitive, because of the small number of cancers; it should not be presented as proven cancer prevention.

One of the most cited descriptions of the global cancer burden of the 2010s, it framed the shift of cancer towards lower-income countries that later GLOBOCAN releases have confirmed.

The UK's own evidence that the disparity is not only American and not only about access: within the NHS, with equal chemotherapy use, young Black women had more triple-negative disease and worse survival. It anchors the disparities idea on the triple-negative page and the UK and NHS page.

The denominator for US triple-negative disparity statistics and the origin of the 10 to 15 percent figure quoted for the subtype's share of breast cancer.

Chemotherapy works in receptor-negative disease at least as well as in receptor-positive disease in proportional terms, and because triple-negative absolute risk is high the absolute gain is large; this is why anthracycline and taxane backbone survived into KEYNOTE-522 and why SCARLET now asks whether the anthracycline can go.

For years the most cited paper in oncology, it fixed the picture of cancer as a growing problem of developing countries and is the baseline against which the 2012, 2018, 2020 and 2022 GLOBOCAN releases show the burden rising.

The trial did not change practice, but it established the idea that the days around surgery are a window in which cheap interventions might reduce metastasis, a line the same group pursued to a positive result with peritumoral lidocaine in 2023. It is a reminder that subgroup findings need confirmation, which is still awaited.

Triple-negative is a laboratory definition; this guideline wrote the oestrogen and progesterone half of it, and the 1 to 10 percent low-positive band it created is still argued over.

For women who carry a BRCA mutation, preventive removal of the ovaries and tubes saves lives, and preventive mastectomy almost eliminates breast cancer. These are the strongest prevention effects in oncology, which is why finding carriers before they develop cancer matters so much.

This paper is why metastasis, stemness and therapy resistance are now studied as one problem. It suggests that the cells most able to spread are also the ones most able to regrow, and it motivates therapies that target the mesenchymal or stem-like state.

The first of the modern GLOBOCAN summaries in CA, it set the template that Jemal, Torre, Bray and Sung later followed and provides the 2002 baseline for tracking how the global burden has grown and shifted.

This paper extended the cancer stem cell concept from leukaemia to a common solid tumour and started the search for tumour-initiating cells across cancers. It underpins research on why cancers relapse after treatments that shrink them and on therapies aimed at the cells that regrow disease.

The first evidence that the basal-like group is not just biologically distinct but clinically dangerous, the observation that triple-negative outcome studies of 2007 confirmed in the clinic.

The origin of the intrinsic subtypes and of the word basal-like; triple-negative breast cancer is the clinical shadow of this molecular group, though the two overlap imperfectly.