A 2017 study of over 200,000 people used tonsillectomy history as one of 23 infection-related traits studied together, finding genes in immunity and embryonic development linked to susceptibility.
The tonsils are lymphoid tissue at the back of the throat, part of the immune system's first line of defense against inhaled and swallowed pathogens. Tonsillectomy — surgical removal of the tonsils — is most often performed for recurrent or severe throat infections, or for airway obstruction. In the genetic study behind this page, a self-reported history of tonsillectomy was used as a proxy for a history of throat infections severe or frequent enough to warrant surgery — a window into genetic susceptibility to infection, not into the genetics of the surgery itself.
Tian et al. 2017, a 23andMe study of over 200,000 people of European ancestry, asked about self-reported history across 23 different infections and infection-related procedures at once — including chickenpox, mononucleosis, strep throat, urinary tract infections, and tonsillectomy. Across all 23 traits combined, the study found 59 genome-wide-significant associations for 17 of them, concentrated in genes with roles in immunity and in embryonic development, plus a detailed fine-mapping of the HLA region (the immune system's own genetic identification system) that pointed to specific amino acid positions in the antigen-binding groove — the part of an immune receptor that actually grips a piece of a pathogen.
This page's variants include several that fit those themes directly: NFKB1, a master transcription factor that switches on much of the body's inflammatory and immune response; FOXN1, essential for the thymus — the organ where T cells mature and learn to recognize threats — to develop properly; CXCL13, a signaling molecule that organizes B cells within lymphoid tissue like the tonsils themselves; and TBX1, an embryonic-development gene, matching the paper's own stated theme of development-related loci alongside purely immune ones.
This page describes genetic associations with a self-reported history of throat infections, not a recommendation about tonsillectomy. None of these variants are used by any guideline to decide who needs the procedure, and having or not having them says nothing about an individual's need for surgery.
The decision to remove tonsils is made clinically, based on the frequency and severity of documented infections or on airway obstruction — not on genotype. Nothing on this page changes that evaluation.
What a 23andMe/AncestryDNA export or raw VCF can and can't tell you about Tonsillectomy (Throat Infection Susceptibility) comes down to these specific, well-studied positions — not a diagnosis. 35 positions are linked to this page; the ones this page's own text discusses are shown first.
The studies behind these variants recruited participants from different ancestries — a result found in one population doesn't always transfer to another. Based on 35 of 35 linked studies with a resolved discovery ancestry.
Databases, guidelines and references
A self-reported history of tonsillectomy was used as a proxy for a history of throat infections severe or frequent enough to require surgery — a window into genetic susceptibility to infection, not the genetics of the surgery itself.
Studying self-reported history across 23 infections and related procedures in over 200,000 people, it found 59 genome-wide-significant associations across 17 of the traits, concentrated in genes involved in immunity and embryonic development.
No. The decision to perform a tonsillectomy is made clinically, based on the frequency and severity of documented infections or airway obstruction — not on genotype, and none of these variants predicts an individual's need for surgery.
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