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  • Review Article
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Global burden and epidemiology of Barrett oesophagus and oesophageal cancer

Abstract

Oesophageal cancer is a global health problem; in 2018 there were more than 572,000 people newly diagnosed with oesophageal cancer worldwide. There are two main histological subtypes of oesophageal cancer, oesophageal adenocarcinoma (EAC) and oesophageal squamous cell carcinoma (ESCC), and there has been a dramatic shift in its epidemiology. While the incidence of EAC and its precursor lesion, Barrett oesophagus, has increased in Western populations over the past four decades, the incidence of ESCC has declined in most parts of the world over the same period. ESCC still accounts for the vast majority of all oesophageal cancer cases diagnosed worldwide each year. Prognosis for patients with oesophageal cancer is strongly related to stage at diagnosis. As most patients are diagnosed with late-stage disease, overall 5-year survival for oesophageal cancer remains <20%. Knowledge of epidemiology and risk factors for oesophageal cancer is essential for public health and clinical decisions about risk stratification, screening and prevention. The goal of this Review is to establish the current epidemiology of oesophageal cancer, with a particular focus on the Western world and the increasing incidence of EAC and Barrett oesophagus.

Key points

  • Oesophageal squamous cell carcinoma (ESCC) remains the most common subtype of oesophageal cancer worldwide; however, in Western populations, the incidence of oesophageal adenocarcinoma (EAC) has increased markedly.

  • The causes of the striking male predominance and racial difference in the incidence of EAC, and its precursor, Barrett oesophagus, remain unknown.

  • The main risk factors for EAC and Barrett oesophagus are gastroesophageal reflux disease, abdominal obesity and cigarette smoking, whereas alcohol consumption and cigarette smoking cause most ESCC cases globally.

  • Patients with EAC who have a prior diagnosis of Barrett oesophagus have better outcomes than patients without a prior diagnosis of Barrett oesophagus; however, this situation represents <10% of patients with EAC.

  • Screening for EAC and Barrett oesophagus needs to go beyond patients with frequent gastroesophageal reflux disease symptoms to include other established risk factors, including obesity and smoking.

  • To date, no screening or surveillance algorithm has sufficient discriminatory accuracy or external validation to support clinical use.

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Fig. 1: Oesophageal cancer incidence.
Fig. 2: Oesophageal cancer incidence trends.
Fig. 3: Oesophageal cancer survival.

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Thrift, A.P. Global burden and epidemiology of Barrett oesophagus and oesophageal cancer. Nat Rev Gastroenterol Hepatol 18, 432–443 (2021). https://doi.org/10.1038/s41575-021-00419-3

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