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Generalized resistance to thyroid hormone

THRB · rs121918700

Stands on its own. Nothing else here links to this position yet — but the page above is the point: what the research found, what each genotype means, and where it came from, in language you can read. Links to conditions, drugs and the senses appear automatically if we write them.

Strength of the evidence

1 / 4

ClinVar classifies it as disease-causing (or likely), reviewed at 0 of 4 stars.

How this is scored

4: ClinVar disease-causing, reviewed by an expert panel or a guideline (3–4 stars). 3: ClinVar, several labs agreeing (2 stars), or a genetic study at p ≤ 10−50. 2: ClinVar from one lab (1 star), or p ≤ 10−20. 1: ClinVar submitted without criteria (0 stars), or genome-wide significance (p ≤ 5×10−8). The higher of the two counts. It says how solid the evidence is, not whether it matters for a particular person.

What ClinVar records

Classification Pathogenic for Generalized resistance to thyroid hormone; no assertion criteria provided (0 of 4 stars, 1 submitter), last evaluated 1994-05-01. ClinVar record 12541 NM_001354712.2(THRB):c.964G>C (p.Asp322His)

Change history MyGeneLog™ keeps a copy of every weekly release from 2026-10-19 and compares them. This position's classification has not changed since.

What this is ClinVar's aggregate record for this position (as of its 2026-10-19 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

What each result means

C/C No copy of the version ClinVar lists as disease-causing for Generalized resistance to thyroid hormone. This is the usual result. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000012541, no assertion criteria provided)
C/G One copy of the version ClinVar lists as disease-causing for Generalized resistance to thyroid hormone. Some conditions need only one copy; for others, one copy makes a person a carrier who is usually healthy but can pass it on. A genetic counsellor can say which applies. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000012541, no assertion criteria provided)
G/G Two copies of the version ClinVar lists as disease-causing for Generalized resistance to thyroid hormone. A result like this should be confirmed by a medical genetic test and talked through with a doctor; consumer DNA files can misread rare variants. This call was sent to ClinVar without the lab's criteria, the least certain kind of record, so it may change. (ClinVar VCV000012541, no assertion criteria provided)

Source: ClinVar VCV000012541, no assertion criteria provided

Questions about rs121918700

What is rs121918700?

rs121918700 is a single position in the genome, in or near the THRB gene. Published research associates it with generalized resistance to thyroid hormone. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.

Does having rs121918700 mean I will get this?

No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.

Where does the information about rs121918700 come from?

ClinVar VCV000012541, no assertion criteria provided. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.

Quoting this page

Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.

Generalized resistance to thyroid hormone (rs121918700). MyGeneLog™. https://www.mygenelog.com/variants/rs121918700

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