A fixed and painless lump is the primary symptom in 90 percent of self-detected breast cancer cases in Brazil, health experts warned during Pink October.
The annual Pink October campaign focuses on raising public awareness, encouraging early diagnosis, and expanding treatment access across the country. Breast cancer remains the most common form of cancer among women, driven by a combination of hormonal, genetic, environmental, and lifestyle factors.
Brazil's National Cancer Institute estimates that the country will register 78,610 new breast cancer cases annually between 2026 and 2028. Excluding non-melanoma skin cancers, the disease accounts for 30 percent of all new cancer diagnoses in women nationwide.
Risk factors and lifestyle choices
Viviane Esteves, a mastologist at the Fernandes Figueira National Institute of Women, Children and Adolescent Health, part of the Oswaldo Cruz Foundation in Rio de Janeiro, outlined key factors that increase disease risk. Ageing, a sedentary lifestyle, excess body weight after menopause, and alcohol consumption all contribute to a higher statistical likelihood of developing the condition.
Esteves said that non-modifiable risks include genetic predisposition, family history, high breast density, previous chest radiation, specific high-risk breast lesions, and certain hormonal treatments. Reproductive history also influences individual vulnerability.
Although genetic traits cannot be altered, healthy daily routines significantly lower risk. Esteves noted that regular physical activity, weight management, balanced nutrition, and avoiding alcohol can reduce breast cancer risk by up to 30 percent. She added that breastfeeding also offers a protective effect, though healthy habits do not eliminate risk entirely.
Warning signs and early screening
The most common indicator of breast cancer is a fixed, painless nodule, which accounts for roughly 90 percent of cases discovered through self-examination. Other physical changes also warrant immediate medical evaluation.
Esteves listed additional warning signs, including skin redness, skin retraction, an orange-peel texture on the breast, nipple inversion, small lumps in the armpits or neck, and spontaneous abnormal nipple discharge. However, tumors can develop without producing any physical symptoms at all.
Screening mammograms are designed to identify breast cancer before symptoms become noticeable. Esteves emphasized that detecting tumors at their earliest stage provides patients with the highest probability of a complete cure.
Genetic factors and younger patients
Although breast cancer incidence rises with age, younger women remain vulnerable. In Brazil, approximately one third of women diagnosed with breast cancer are under 50 years old, while between 5 percent and 17 percent of cases occur in women under 40.
Denser breast tissue in younger women can make mammogram interpretation more difficult, requiring prompt investigation of any suspicious changes regardless of patient age. Esteves noted that treating young patients requires careful consideration of hereditary factors and fertility preservation.
Family history requires careful medical assessment but does not automatically indicate a high hereditary risk. Esteves explained that the degree of kinship, the number of affected relatives, their age at diagnosis, and the types of cancer involved dictate risk levels. A mother or sister with breast cancer increases risk, but multiple cases across maternal or paternal lines, particularly at young ages, demand specialized genetic evaluation.
Genetic testing is recommended for patients diagnosed before age 40, families with multiple cases of breast or ovarian cancer, instances of male breast cancer, bilateral breast tumors, or individuals experiencing both breast and ovarian cancer. Complementary diagnostic tools such as ultrasound may be used alongside mammography.
Hormonal contraceptives and health myths
Public awareness initiatives during Pink October also aim to dismantle persistent medical myths surrounding breast cancer prevention and risk. Medical studies indicate only a minor increase in risk associated with current or recent use of hormonal contraceptives.
Esteves calculated that oral contraceptive use accounts for approximately one additional breast cancer case per 7,600 to 8,000 users over years of clinical follow-up. She advised against widespread discontinuation of birth control based solely on this low statistical risk.
Contraceptive choices should be tailored to each woman after evaluating her age, personal medical history, baseline risk factors, and the overall health benefits of contraception.
Diagnosis and public healthcare access
Following a confirmed diagnosis, patients require structured care from a multidisciplinary medical team. Physicians analyze biopsy results to determine tumor characteristics, including hormone receptor and HER2 protein status, while ordering imaging tests to assess disease staging.
Treatment plans are tailored based on diagnostic findings and may combine surgery, radiotherapy, chemotherapy, or specialized targeted medications. Patients relying on Brazil's public health system, the Unified Health System, begin their care journey at a local Basic Health Unit.
Once a basic health unit physician confirms a diagnosis, they submit a request for specialized oncology or mastology care. The national health regulation system then directs the patient to an accredited public specialist hospital.
Patient advocacy and personal recovery
The critical role of early detection is illustrated by the experience of Renata Fernandes, a health law attorney who was diagnosed with early-stage breast cancer at age 29. During a routine examination 15 years ago, an ultrasound detected a nodule initially dismissed as a benign fat deposit.
Despite assurances that her young age and lack of risk factors made cancer unlikely, Fernandes requested further medical tests. Subsequent biopsies revealed an early-stage infiltrating carcinoma.
During treatment, Fernandes worried that aggressive therapies would cause permanent infertility and end her hopes of motherhood. After completing therapy, her medical team cleared her to conceive, and she subsequently gave birth to two children, becoming pregnant on the first attempt in both instances.
Fernandes now shares her story to encourage young women to monitor their bodies and pursue thorough medical evaluations for any unusual symptoms. She stressed that a cancer diagnosis does not signify the end of personal dreams or career ambitions.
Her health battle transformed her professional focus. Today, Fernandes works exclusively in health law, representing patients who must legally enforce access to medical treatments, surgeries, and prescription drugs. During her own recovery, she had to take legal action against her private health insurer to secure required coverage.
Workplace rights and tax exemptions
Women facing breast cancer treatments in Brazil are entitled to specific legal, labor, and social security protections, according to labor attorney Rogeana França. If a diagnosis results in total and permanent work incapacity without potential for professional rehabilitation, the worker may qualify for permanent disability retirement.
Under Brazilian Law 8,213/91, employees facing medical leaves exceeding 15 days for surgeries or oncological therapy can access temporary incapacity benefits. Furthermore, Law 9,029/95 protects female workers from discriminatory dismissal following a cancer diagnosis.
Under Law 8,036/90, workers diagnosed with cancer have the legal right to withdraw the full balance from their Length-of-Service Guarantee Fund accounts. While a cancer diagnosis does not provide a blanket tax exemption, Article 6 of Law 7,713/88 grants federal Income Tax exemptions on retirement earnings and pensions for individuals diagnosed with malignant neoplasms.
Federal regulations mandate that public healthcare facilities prioritize cancer treatment, requiring first therapy procedures to begin within 60 days of a confirmed pathological report, or sooner if clinically necessary. Patients undergoing mastectomies in the public system also possess a statutory right to reconstructive breast surgery, preferably performed during the primary operation.
