Survival outcomes in early-onset oesophageal adenocarcinoma patients: A systematic review and meta-analyses.

Background: The incidence of oesophageal adenocarcinoma (OAC) has been reported to be increasing in many countries. Alongside this trend, an increase in incidence of early-onset OAC, defined as OAC in adults aged under 50 years, has been observed. It is unclear whether survival outcomes for early-onset OAC patients differ from older age groups.

Aim: To investigate survival outcomes in early-onset OAC patients.

Methods: Ovid Medline and Embase were searched from inception to January 2022 for relevant studies relating to early-onset OAC and survival outcomes. Results regarding the overall five-year survival and risk of death of younger and older patients with OAC were extracted and pooled using meta-analyses to produce pooled estimates and 95%CIs where possible.

Results: Eleven studies which compared survival of early-onset OAC, defined as age at diagnosis of < 50 years, with older patients were included. A narrative review of median and mean survival demonstrated conflicting results, with studies showing early-onset OAC patients having both better and worse outcomes compared to older age groups. A meta-analysis of five-year survival demonstrated similar outcomes across age groups, with 22%-25% of patients in the young, middle and older age groups alive after five years. A meta-analysis of four studies demonstrated that early-onset OAC patients did not have a significantly increased risk of death compared to middle-aged patients (hazard ratio 1.12, 95%CI: 0.85-1.47).

Conclusion: Results suggest that early-onset OAC patients do not have a significantly different survival compared to older patients, but further population-based research, taking into account stage and treatment, is required.