Surgeons should note that early onset colorectal cancer (diagnosed before age 50) is distinct from late-onset cases, significantly impacting risk assessment and treatment.

• Analyzed data from nearly 20,000 patients showed a higher prevalence in distal and rectal sites, particularly among Hispanic and Asian populations.
• Early onset cases exhibit diverse genomic alterations, including higher rates of TP53 mutations and different signaling pathway vulnerabilities compared to late-onset cases.

Recognizing these differences can enhance age-specific screening and precision therapies for younger patients.

• Notable comutation patterns and unique immediate-early gene expression further differentiate this cancer type.