ArticleTherapeutic advances in medical oncology2026
Clinical characteristics and outcomes in patients with early-onset locally advanced rectal cancer.
Article in Therapeutic advances in medical oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: The incidence of early-onset colorectal cancer (EO-CRC), defined as a diagnosis before 50 years of age, is increasing worldwide. However, its clinical characteristics and outcomes compared to average-onset colorectal cancer (AO-CRC) remain under debate, especially in the setting of locally advanced rectal cancer (LARC). Objectives: This study aimed to compare clinical characteristics, treatment responses, and survival outcomes between patients with early-onset and average-onset locally advanced rectal cancer. Design: A multicenter retrospective cohort study. Methods: We retrospectively analysed 305 patients with stage II-III rectal cancer treated between 2012 and 2022 across three Italian oncology centrers. Patients were categorised as EO-RC (⩽50 years) or AO-RC (>50 years). All patients underwent neoadjuvant chemoradiotherapy followed by total mesorectal excision. Pathological and radiological responses were evaluated, and survival outcomes were assessed through Kaplan-Meier methods. Results: Early-onset patients accounted for 10.5% of the cohort. Clinical and pathological characteristics were broadly similar between groups, although EO-RC patients had a higher prevalence of proficient mismatch repair status. Radiological and pathological response rates were comparable. After a median follow-up of 120 months, the 10-year overall survival (OS) was 73.3% in EO-RC and 91.9% in AO-RC (HR 7.60, 95% CI 2.22-26.06; Conclusion: Early-onset rectal cancer patients exhibit similar response rates and DFS compared to older patients, but appear to have worse OS. Further studies are needed to explore biological factors and post-recurrence treatment strategies that may influence these outcomes.
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