Young onset colorectal cancer: How does it differ from its older counterpart?

Area of Science:

• Oncology
• Gastroenterology
• Clinical Research

Background:

• Colorectal cancer (CRC) incidence in younger populations is a subject of ongoing debate.
• Conflicting reports exist regarding the distinct patterns of CRC occurrence and survival in young versus older individuals.

Purpose of the Study:

• To analyze clinicopathological characteristics, treatment, and survival of sporadic young-onset colorectal cancer (YOCR) patients (<40 years).
• To compare YOCR patients with an older cohort (>40 years) to identify differences in disease presentation and outcomes.

Main Methods:

• Retrospective analysis of 172 patients diagnosed with colorectal cancer.
• Comparison of clinicopathological features, treatment modalities, and survival between YOCR (<40 years) and older (>40 years) patient groups.
• Exclusion of patients with hereditary syndromes to focus on sporadic cases.

Main Results:

• YOCR patients (42%) presented more frequently with incontinence (P=0.02) and obstruction (P=0.03).
• A higher proportion of rectal cancers (P=0.01) and left-sided disease was observed in the YOCR group, with significantly lower resectability rates for both left-sided (P=0.04) and rectal cancers (P=0.02).
• Despite differences in presentation and resectability, overall survival rates were similar between the YOCR and older groups.

Conclusions:

• Sporadic colorectal cancers in younger individuals tend to be diagnosed at more advanced stages and are less amenable to surgical resection compared to older patients.
• Further genetic research is warranted to understand the observed left-sided predominance and aggressive nature of sporadic CRC in younger subgroups.