Mutational Signatures May Define Oral Cancers - Takeaways - DentalSpire

Mutational Signatures May Define Oral Cancers

Researchers identified endogenous mutational and immune-response patterns in oral cancers arising without exposure to tobacco, alcohol, or human papillomavirus infections.

  • By

  • Andrea Surnit

  • May 26, 2026

  • 3 min

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  • 1

    Oral cavity squamous cell carcinomas without known risk factors exhibit distinct mutational and molecular profiles compared to tobacco-associated cancers.

  • 2

    Researchers identified two main subtypes among tumors with no identified risk factors, predominantly represented by SBS1 and SBS1/APOBEC mutational clusters.

  • 3

    The SBS1 cluster accounted for 60% of tumors with no identified risk factors, while the SBS1/APOBEC cluster represented 34% of these tumors.

  • 4

    Younger patients were more frequently found in the SBS1 cluster, whereas older patients were distributed between the SBS1 and SBS1/APOBEC groups.

  • 5

    The study highlights distinct genomic characteristics of no-identified-risk-factor oral cancers, revealing unique biological pathways and immune response mutations.

Original Source(s)

Mutational Signatures May Define Oral Cancers

  • by Andrea Surnit

  • May 26, 2026

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