Gastric Cancer: an Evolving Disease.

Area of Science:

• Epidemiology
• Oncology
• Public Health

Background:

• Global prevalence of Helicobacter pylori (H. pylori), a primary cause of gastric cancer, is declining.
• Gastric cancer incidence historically affected males, Asians, and lower socioeconomic groups.
• Recent literature provides an update on evolving gastric cancer epidemiology.

Purpose of the Study:

• To review recent literature on changes in gastric cancer epidemiology.
• To analyze shifts in incidence trends across demographics and tumor locations.
• To explore potential explanations for the evolving gastric cancer landscape.

Main Methods:

• Literature review of recently published studies.
• Analysis of gastric cancer incidence trends by age, sex, race/ethnicity, and tumor location.
• Examination of hypotheses explaining observed epidemiological shifts.

Main Results:

• Gastric cancer incidence trends differ by age, sex, race/ethnicity, and tumor location.
• Incidence is stabilizing in younger Western cohorts with declining H. pylori.
• Changes are more pronounced in females and for tumors outside the esophageal-gastric junction.
• The role of H. pylori as the sole etiological driver is diminishing.
• Classical incidence patterns are evolving, potentially altering historical male predilection and increasing overall rates.

Conclusions:

• Gastric cancer epidemiology is undergoing significant evolution.
• Shifting risk factor profiles, beyond H. pylori, require further investigation.
• Understanding these changes is crucial for addressing the potential re-emergence of gastric cancer as a public health issue.