Introduction: Breast cancer is the most diagnosed neoplasm worldwide and one of the main causes of female morbidity and mortality. Quadrantectomy, indicated in early stages, is a conservative surgery that removes the tumor and the affected breast quadrant, and can be performed in a standard way—with resection of breast tissue, skin, and subcutaneous tissue—or subcutaneously, preserving these structures with a discreet periareolar incision. This approach maintains oncologic radicality while offering better aesthetic outcomes and reduced need for oncoplastic interventions. Objectives: To analyze the performance of quadrantectomies for the treatment of breast neoplasms in Brazil between 2014 and 2024. Methods: This is an epidemiological, descriptive, and quantitative study using data from the SUS Hospital Information System (SIH-SUS), available on DATASUS. Oncologic quadrantectomy procedures performed in Brazil between 2014 and 2024 were analyzed, considering variables such as year of hospitalization, regions, care regimen, deaths, average hospitalization cost, and average length of stay. Results: A total of 77,359 oncologic quadrantectomies were recorded in the period, with a significant drop in 2020 (5,595 cases, -24.4% compared to 2019). The North Region accounted for 4.3% of procedures (3,364 cases), while the Southeast accounted for 51.7% (40,019 cases), with the North showing the highest proportional growth of 380% (from 124 to 596 cases). Regarding the care regimen, 81.7% of records (63,541) were classified as “ignored,” and among the identified, 13.3% were in the private sector (10,350) and 5.0% in the public (3,880). The mortality rate was 0.08% (61 deaths), with no records in the North and 45.9% in the Southeast (28 deaths ). The national average cost per hospitalization was R$ 2,372.03, ranging from R$ 2,401.00 in the North to R$ 2,329.92 in the Midwest, with the South showing the fourth highest cost (R$ 2,365.33). The average length of stay was 1,4 days, ranging from 2,8 days in the North to 1 day in the South. Conclusion: The drop in 2020 suggests the impact of the COVID-19 pandemic on cancer care, possibly due to the suspension of elective surgeries and resource reallocation. Although the North showed expressive proportional growth, its absolute numbers remain low, while the Southeast concentrated over half of the procedures, reflecting historical inequalities in access to primary care, early diagnosis, and technology. The high proportion of “ignored” records hinders the analysis between SUS and private sector, evidences reporting failures, and complicates evidence-based policies. The low mortality rate suggests procedural safety, but the concentration of deaths in the Southeast may reflect underreporting or higher population density. The stability in costs and average stay, with slight disparity in the North, suggests the consolidation of quadrantectomy as a standardized SUS practice, despite regional limitations. It is concluded that the performance of quadrantectomies in Brazil reflects regional disparities in access to breast cancer treatment, highlighting the need for further studies to explore these gaps and guide more effective public policies.
It is with great enthusiasm that we present the Annals of the Oncology International Symposium 2025, an event that continues to solidify its significance in the oncology landscape of northern Brazil. Held in Belém, Pará, Oncology 2025 centered around the theme "The cancer control challenge: better knowing it to best facing it," dedicating itself to exploring the latest frontiers in cancer treatment and prevention.
This year, the symposium provided a deep dive into the essential role of knowledge in the fight against cancer, presenting new perspectives and scientific advancements across various areas of oncology. Renowned global experts gathered to share their most recent research and innovative approaches, offering participants a comprehensive view of the challenges faced by healthcare professionals and patients worldwide.
Presentations and discussions during the event focused on critical topics such as the use of new technologies, advancements in personalized therapies, and more effective prevention strategies. Additionally, particular attention was given to the unique challenges faced by the Amazon region, with efforts aimed at developing region-specific solutions to meet local needs.
Beyond being a high-caliber academic event, Oncology 2025 stood out as a moment for integration and professional networking, with the warm hospitality of the city of Belém offering participants a unique experience. This event became a platform for exchanging ideas, where science, culture, and humanity came together in pursuit of a common goal: to improve cancer control both in Brazil and globally.
This collection of abstracts and articles presented during the event reflects the ongoing dedication to research and the development of innovative solutions, highlighting the importance of collaboration and shared knowledge in the fight against cancer.
General Submission Guidelines:
The presenting author, who does not have to be the first author, must be registered for Oncology 2025.
Each abstract may have up to 10 authors, including the main author and co-authors.
Only original, unpublished work will be accepted.
Submissions must be related to oncology. However, project descriptions, work proposals, experience reports, and literature reviews will not be considered.
Clinical case reports are allowed, provided the abstract addresses scientific questions, details clinical observations, and includes primary scientific data.
The abstract must be written in English, but presentations may be given in Portuguese.
Abstracts must be between 300 and 500 words.
Comissão Organizadora
Comissão Científica
See Annals of Oncology 2023 at:
https://www.even3.com.br/anais/oncology-2023-international-symposium/
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