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Background <p>The incidence of early-onset colorectal cancer (EOCRC) is rapidly increasing. There may be differences in pathological characteristics and epidemiological trends between different subgroups of EOCRC, which warrants further investigation.</p> Materials <p>We utilized the Surveillance, Epidemiology, and End Results (SEER) 17 database and the Global Burden of Disease (GBD) 2021 data to analyze clinical, prognostic, and epidemiological differences by dividing EOCRC into Very Early Onset Colorectal Cancer (VEOCRC, ages 15–29) and Mid-Aged Early Onset Colorectal Cancer (MAEOCRC, ages 30–49) over the past 15 years. Statistical analyses included Kaplan-Meier survival analysis, joinpoint regression, average annual percentage change (AAPC) analysis, decomposition analysis.</p> Results <p>The VEOCRC group had a significantly higher proportion of mucinous adenocarcinoma/signet ring cell carcinoma (MA/SRCC) (18.1% vs. 8.7%) and more advanced histologic grades III and IV (32.2% vs. 18.9%) compared to MAEOCRC. There were no significant pathological differences between MAEOCRC and Late-onset CRC (LOCRC). VEOCRC had a worse prognosis than MAEOCRC, especially at stage III. From 2006 to 2021, the age-standardized incidence rate (ASIR) for VEOCRC grew faster than for MAEOCRC globally (AAPC: 0.78 vs. 0.63), notably in high-middle Socio-demographic Index (SDI) countries (AAPC: 2.01 vs. 1.44). Excluding carcinoid tumors, the incidence of VEOCRC in high SDI countries has remained stable over the past 15 years, whereas in high-middle SDI countries, it surpassed high SDI countries as early as 2013, reaching the highest globally. Decomposition analysis revealed that in high-middle SDI countries, epidemiological changes contributed more to the increase in VEOCRC compared to MAEOCRC.</p> Conclusions <p>VEOCRC and MAEOCRC differ significantly in clinical characteristics, prognosis, and epidemiology, with VEOCRC showing worse pathology and prognosis. In the past 15 years, the global incidence of VEOCRC has risen faster than MAEOCRC, warranting particular attention from policymakers, especially in high-middle SDI countries.</p>

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Distinct clinical features and epidemiological trends of very early and middle-aged early onset colorectal cancer based on SEER 17 and GBD 2021 data over the past 15 years

  • 期刊论文

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  • 发表日期：

    2025年11月22日

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  • Xuanhong Jin,
  • Bingjun Bai,
  • Yang Pan,
  • Shangzhi Xie,
  • Yao Chen,
  • Kaibo Ding,
  • Fei Wu,
  • Xing Gao,
  • Liangkun You,
  • Hongming Pan,
  • Binbin Xie

摘要

Background

The incidence of early-onset colorectal cancer (EOCRC) is rapidly increasing. There may be differences in pathological characteristics and epidemiological trends between different subgroups of EOCRC, which warrants further investigation.

Materials

We utilized the Surveillance, Epidemiology, and End Results (SEER) 17 database and the Global Burden of Disease (GBD) 2021 data to analyze clinical, prognostic, and epidemiological differences by dividing EOCRC into Very Early Onset Colorectal Cancer (VEOCRC, ages 15–29) and Mid-Aged Early Onset Colorectal Cancer (MAEOCRC, ages 30–49) over the past 15 years. Statistical analyses included Kaplan-Meier survival analysis, joinpoint regression, average annual percentage change (AAPC) analysis, decomposition analysis.

Results

The VEOCRC group had a significantly higher proportion of mucinous adenocarcinoma/signet ring cell carcinoma (MA/SRCC) (18.1% vs. 8.7%) and more advanced histologic grades III and IV (32.2% vs. 18.9%) compared to MAEOCRC. There were no significant pathological differences between MAEOCRC and Late-onset CRC (LOCRC). VEOCRC had a worse prognosis than MAEOCRC, especially at stage III. From 2006 to 2021, the age-standardized incidence rate (ASIR) for VEOCRC grew faster than for MAEOCRC globally (AAPC: 0.78 vs. 0.63), notably in high-middle Socio-demographic Index (SDI) countries (AAPC: 2.01 vs. 1.44). Excluding carcinoid tumors, the incidence of VEOCRC in high SDI countries has remained stable over the past 15 years, whereas in high-middle SDI countries, it surpassed high SDI countries as early as 2013, reaching the highest globally. Decomposition analysis revealed that in high-middle SDI countries, epidemiological changes contributed more to the increase in VEOCRC compared to MAEOCRC.

Conclusions

VEOCRC and MAEOCRC differ significantly in clinical characteristics, prognosis, and epidemiology, with VEOCRC showing worse pathology and prognosis. In the past 15 years, the global incidence of VEOCRC has risen faster than MAEOCRC, warranting particular attention from policymakers, especially in high-middle SDI countries.