Abstract
40 Background: Gastroesophageal junction (GEJ) cancer can be endoscopically resected and/or ablated in its early tumor stage. Despite significant effort to address the epidemiology and populations at risk for distal esoaphgeal cancer, very limited effort has been undertaken to assess such in GEJ cancer. Methods: A SEER database analysis was performed for the study period 1973 – 2013. Inclusion criteria were GEJ cancer (microscopically confirmed primary site of malignancy with ICD-O-3 histology of adenocarcinoma). Data was stratified by years 1973-82, 1983-92, 1993-2002 and 2003-2012, patient age, gender, and race. A Kaplan-Meier curve for the 5-year survival analysis of GEJ cancer was calculation. Further, GEJ cancer data was compared with the epidemiology of distal esophageal cancer (ICD-10). Results: 32,073 patients with GEJ cancer were included in the SEER database between 1973 and 2015 (female 19%, Caucasian race 88.7%). The incidence of GEJ cancer increased significantly over the four decades between 1973 and 2013, 15.7%, 25.3%, 26.9% and 32% (p = 0.001). The rising prevalence was particularly accounted in the patient age cohorts 65-74 years and 75+ years and in white male patients followed by black male patients. The 5-year survival analysis showed a median survival during the four analyzed decades of 8, 10, 11, and 14 months, respectively (Log rank test p < 0.001). During the last decades (1993-2002 and 2003-2012) GEJ cancer and distal esophageal cancer had comparable incidences. Conclusions: GEJ cancer incidence is rising over the last four decades and is in fact comparable with the incidence of distal esophageal cancer. This is particularly true for white male patients and patients older than 65 years. Given that early GEJ cancer is endoscopically treatable, more effort is warranted to address its risk factors and to identify populations at risk who could benefit from early cancer detection programs.
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