Introduction: Gastric cancer ranks among the leading malignant neoplasms in Brazil, with particular prominence in the Northern Region, where it represents a significant cause of morbidity and mortality. In the state of Pará, this scenario is exacerbated by socioeconomic disparities, barriers to accessing healthcare services, and high exposure to environmental and dietary risk factors. According to the Brazilian National Cancer Institute (INCA), factors such as excessive salt intake, obesity, Helicobacter pylori infection, and specific occupational conditions significantly increase the likelihood of disease development. Objectives: To analyze the incidence and temporal distribution of gastric cancer cases (ICD-10 C16) in the state of Pará between 2020 and 2025 using data from the Cancer Information System (SISCAN), and to identify the main dietary and occupational risk factors associated with increased risk, based on INCA evidence. Methods: This is a descriptive epidemiological study using secondary data obtained from the DATASUS and Tabnet platforms. All records of new gastric cancer cases among residents of Pará from January 2020 to May 2025 were included. The analysis considered annual incidence and regional distribution, with emphasis on the Northern Region of the state. Results: From January 2020 to May 2025, a total of 1,687 cases of gastric cancer were reported in the state of Pará. A higher concentration of cases was observed in the Northern Region, accounting for over 96% of annual records across all analyzed years. In 2020, 292 cases were recorded, with 282 (96.6%) in the Northern Region. In 2021, there was a substantial 49% increase, totaling 435 cases, 424 (97.4%) of which occurred in the same region. In 2022, the number dropped to 339 cases (330 in the Northern Region), followed by further reductions in 2023 and 2024, with 307 and 301 cases, respectively. As of May 2025, 13 new cases had been reported, suggesting potential underreporting or delays in data consolidation for the current year. Temporal analysis reveals a fluctuation in incidence over the study period, with a peak in 2021 possibly related to the resumption of elective care services following restrictions imposed by the COVID-19 pandemic, which may have resulted in the diagnosis of previously undetected cases. Geographically, the persistent concentration of cases in the Northern Region of Pará may be linked to high social vulnerability, inadequate basic sanitation, greater consumption of traditionally salt- preserved foods, and a high prevalence of H. pylori infection—a well-established etiological factor. Conclusion: Gastric cancer in the state of Pará constitutes a serious public health issue, multifactorial in nature, with high prevalence and uneven regional distribution. The findings underscore the need for comprehensive prevention and surveillance strategies, including the promotion of healthy eating habits, control of infectious and environmental factors, anti-smoking and alcohol abuse policies, as well as occupational safety measures aimed at reducing exposure to carcinogenic agents.
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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