Introduction: Stomach cancer is a major cause of cancer mortality worldwide, ranking fifth in incidence and mortality among all types of cancer. Overall stomach cancer rates have been decreasing in recent years; however, new studies show an increasing trend in this type of cancer among the younger population. In Brazil, gastric cancer is one of the leading causes of death from malignant neoplasms, and is more prevalent in the North and Northeast regions. The North of Brazil has shown an increasing rate of death from gastric cancer when compared to other regions of the country, with environmental factors such as alcohol and tobacco consumption, and dietary factors, due to the high consumption of salty foods, such as dried meat and salted fish, contributing to this increase. Objectives: To estimate the effects of age, period and birth cohort on the trend of gastric cancer mortality in the State of Pará, Brazil, from 1984 to 2023. Methods: An ecological study of deaths from stomach cancer was carried out in the state of Pará, from 1984 to 2023. Data were extracted from the Mortality Information System, and were searched using the International Classification of Diseases, 10th revision (ICD-10) under code C16. The study population consisted of both sexes, aged ? 30 years. Crude and age-standardized mortality rates were calculated for each period and cohort. Separate analyses were conducted for each sex. The ages and years of deaths were grouped into five-year intervals, with the last being ? 70 years, totaling ten age groups and eight periods. Seventeen birth cohorts were analyzed, the first being from 1909 and the last from 1989. The risk of death from stomach cancer in a given birth cohort or in a given period was estimated using relative risks (RR). The effect of age, period and birth cohort was calculated using the Poisson regression model, using estimable functions: deviations, curvatures and drift, using the Epi library of the statistical program R version 4.5.0. Results: Between 1984 and 2023, 14,161 deaths from stomach cancer were recorded in Pará. Mortality rates per 100,000 inhabitants (MRCAG) increased throughout the historical series, with progressive growth with age. Male and female MRCAG showed a significant increase, being in men from 45 years of age and in women from 55 years of age. In both men and women, a higher relative risk (RR) was observed in the older birth cohorts, with a significant reduction (RR < 1) for men from the 1984 period onwards. The RR for the reference period also showed a significant reduction from the 1984 decade onwards (RR < 1), remaining relatively constant over time for men and women. Conclusion: Based on the analysis of the age-period-cohort effect, gastric cancer was shown to be a disease that predominantly affects people in older age groups, and a reduction in mortality was also observed from 1984 onwards in all age groups.
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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