Carcinogenesis · Pathology

Which of the following is a classic example of 'Tumor Progression'?

  1. The initial mutation in a single cell
  2. The acquisition of additional mutations leading to increased heterogeneity and aggressiveness
  3. The surgical removal of a benign tumor
  4. The repair of DNA by nucleotide excision repair mechanisms
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Correct answer: The acquisition of additional mutations leading to increased heterogeneity and aggressiveness

Tumor progression describes the phenotypic changes over time as a tumor becomes more aggressive. This occurs through the selection of sub-clones that acquire new mutations, allowing for invasion, metastasis, and resistance to therapy.

Difficulty: Medium Question 10 of 20

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