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Genetic alterations during colorectal-tumor development

One-paragraph summary

Vogelstein and colleagues compared genetic alterations across normal mucosa, adenomas and carcinomas and proposed that colorectal progression reflects accumulation of alterations affecting oncogenes and tumor-suppressor loci. The paper's durable claim was not a rigid universal order: the accumulation/combination of changes mattered more than chronology (PMID 2841597).

Key findings

  • Early and late lesions differed in prevalence of specific alterations.
  • The framework linked visible precursor progression to clonal genetic evolution.
  • It made APC/WNT initiation, RAS-associated growth and later suppressor loss experimentally tractable hypotheses.

Limitations

  • Small, technology-limited 1980s specimen series.
  • Copy-number and locus assays preceded sequencing and single-cell analysis.
  • Modern data show branching, parallel and serrated routes.
  • Cross-sectional lesions do not directly observe longitudinal progression.

Why it matters

It transformed the adenoma–carcinoma sequence from morphology alone into an evolutionary genetic model and remains the conceptual baseline against which TCGA, serrated and single-cell revisions are understood.

Cited by wiki pages

  • Overview
  • Adenoma–carcinoma and serrated pathways