Temporal Trends and Sex Differences in the Incidence of Esophageal Squamous Cell Carcinoma and Adenocarcinoma from CI5 VIII-XII Data - Global, 1993-2017.

WHAT IS ALREADY KNOWN ABOUT THIS TOPIC?: Esophageal cancer (EC) consists of two main histological subtypes: esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC), each with distinct epidemiological patterns. Historically, ESCC has been the dominant subtype worldwide, especially in Asian countries. However, in recent decades, the incidence of EAC has been rising rapidly, particularly in European and American countries, reflecting significant shifts in global EC epidemiology.

WHAT IS ADDED BY THIS REPORT?: This study presents a comprehensive analysis of 25 years of high-quality continuous data on ESCC and EAC incidence trends across 25 countries. It highlights declining ESCC rates in most regions, rising EAC rates in Western nations, pronounced sex differences, and narrowing ESCC-to-EAC ratios. These diverse trends reveal the need to investigate region-specific risk factors and their contributions to the shifting burden of EC globally.

WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: The distinct trends of ESCC and EAC call for tailored public health strategies based on regional and histological patterns. Countries experiencing a rising burden of EAC or ESCC can implement targeted risk factor prevention and control measures to address the increasing trends. In clinical practice, a stronger focus on EAC in high-income countries and ESCC in regions, where it remains dominant, can improve early detection and treatment outcomes. Understanding these evolving patterns will aid in designing evidence-based interventions and optimizing resource allocation to reduce the global esophageal cancer burden effectively.