About FGFR4
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. This variant is benign. Select a step to read what it means.
Benign.A benign classification under the recorded framework.
Gene-level background from the recorded interpretation.
Words with a dotted underline have a short definition. Hover or tap them.No gene-level summary was recorded for this case.
The recorded framework is Not recorded. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.
The applied criteria and their strengths are shown as assessed under the stated framework.
No pathogenic criterion marked as applied in the recorded assessment.
Extremely high population frequency: gnomAD v2.1 AF=32.1% (89,487/278,670 alleles, 15,309 homozygotes) and gnomAD v4.1 AF=30.3% (487,943/1,612,462 alleles, 76,363 homozygotes). Far exceeds the BA1 threshold of >1%.
Variant frequency (gnomAD AF=32.1%) far exceeds the threshold for any rare monogenic disorder (BS1 threshold >0.3%), and is inconsistent with a highly penetrant pathogenic role.
Observed in homozygous state in 15,309 individuals in gnomAD v2.1 (76,363 in v4.1), demonstrating the variant is compatible with normal development and inconsistent with a fully penetrant pathogenic variant causing a severe monogenic disorder.
Missense variant in FGFR4, a gene for which loss-of-function is the documented disease mechanism in germline FGFR4-related disorders (familial pituitary adenomas). Truncating variants, not missense changes, are the primarily established pathogenic variant type.
Multiple in silico predictors suggest no deleterious impact: BayesDel score=0.0305 (benign), REVEL=0.519 (borderline/neutral), SpliceAI max delta=0.02 (no splicing impact).
ClinVar classifies this variant as Benign based on submissions from 3 clinical laboratories (ClinVar VariationID 16326).
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: BA1 stand-alone benign, BS1 strong benign, BS2 strong benign, BP1 supporting benign, BP4 supporting benign, BP6 supporting benign; combination = 1 stand-alone benign + 2 strong benign + 3 supporting benign, which maps to Benign.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 487,943 / 1,612,462 alleles. Recorded AF 0.302607. Recorded homozygote count 76363.
This variant is present in gnomAD v2.1 (AF= 0.321122; MAF= 32.11218%, 89487/278670 alleles, homozygotes = 15309) and has highest observed frequency in the East Asian population (AF= 0.450672; MAF= 45.06722%, 8917/19786 alleles, homozygotes = 2008); grpmax FAF= 0.441438.
This variant is present in gnomAD-Canada v1.0 (AF= 0.3066724625081504, 5644/18404 alleles, homozygotes = 883).
Recorded SpliceAI maximum delta score: 0.020. Refer to the recorded PP3/BP4 rationale for interpretation.
3 Benign. ClinVar API review status: criteria provided, multiple submitters, no conflicts.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. FGFR4, a receptor tyrosine kinase, is altered by mutation, chromosomal rearrangement or amplification at low frequencies in various cancer types.
This variant has previously been reported in somatic cancers (COSMIC; COSV52800825, n = 88 times).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under Not recorded, with the data and sources behind each one.
27 criteria with recorded statuses: 6 met · 9 not met · 0 not assessed · 12 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
FGFR4 c.1162G>A (p.Gly388Arg) is an extremely common polymorphism with a global allele frequency of 32.1% in gnomAD v2.1 (89,487/278,670 alleles, 15,309 homozygotes) and 30.3% in gnomAD v4.1 (487,943/1,612,462 alleles, 76,363 homozygotes), meeting BA1 (stand-alone benign).
The variant frequency far exceeds the threshold for any rare monogenic disorder (BS1 threshold >0.3%), with the highest subpopulation frequency of 45.1% in East Asians.
The variant has been observed in the homozygous state in 15,309 individuals in gnomAD v2.1, consistent with Hardy-Weinberg equilibrium for a common benign polymorphism and incompatible with a fully penetrant pathogenic variant (BS2).
FGFR4 germline disease is associated with loss-of-function; this is a missense variant not expected to recapitulate the LoF disease mechanism (BP1).
Multiple in silico predictors are consistent with a benign interpretation: BayesDel score 0.0305 (benign), REVEL 0.519 (neutral), and SpliceAI max delta 0.02 (no splicing impact) (BP4).
ClinVar classifies this variant as Benign based on submissions from 3 clinical laboratories (ClinVar VariationID 16326) (BP6).
Functional studies demonstrate FGFR4 G388R has gain-of-function effects (STAT3 binding, increased cancer cell motility) in cancer models, but these do not establish pathogenicity for a monogenic germline disorder and are superseded by the overwhelming population frequency evidence.
No criteria match.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
Every interpreted variant in FGFR4, mapped onto the exon structure of NM_213647.2. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| East Asian19626 / 44,778 | 0.444303 hom |
| Admixed American23199 / 59,888 | 0.394684 hom |
| South Asian31927 / 91,004 | 0.355806 hom |
| European (Finnish)20954 / 63,772 | 0.333513 hom |
| Ashkenazi Jewish9351 / 29,532 | 0.321477 hom |
| Remaining individuals19204 / 62,440 | 0.313037 hom |
| European (non-Finnish)351873 / 1,179,108 | 0.352564 hom |
| Middle Eastern1740 / 6,050 | 0.29267 hom |
| Amish248 / 912 | 0.2732 hom |
| African/African American9821 / 74,978 | 0.13680 hom |
| East Asian8917 / 19,786 | 0.452008 hom |
| Admixed American14782 / 35,216 | 0.423124 hom |
| South Asian10745 / 30,522 | 0.351929 hom |
| European (Finnish)8097 / 24,858 | 0.331399 hom |
| Ashkenazi Jewish3254 / 10,218 | 0.32512 hom |
| Remaining individuals2261 / 7,124 | 0.32349 hom |
| European (non-Finnish)38234 / 126,270 | 0.35780 hom |
| African/African American3197 / 24,676 | 0.13208 hom |
This variant is present in gnomAD v4.1 (AF= 0.302607; MAF= 30.26074%, 487943/1612462 alleles, homozygotes = 76363) and has highest observed frequency in the East Asian population (AF= 0.438296; MAF= 43.82956%, 19626/44778 alleles, homozygotes = 4303); grpmax FAF= 0.433162.
This variant is present in gnomAD v2.1 (AF= 0.321122; MAF= 32.11218%, 89487/278670 alleles, homozygotes = 15309) and has highest observed frequency in the East Asian population (AF= 0.450672; MAF= 45.06722%, 8917/19786 alleles, homozygotes = 2008); grpmax FAF= 0.441438.
This variant is present in gnomAD-Canada v1.0 (AF= 0.3066724625081504, 5644/18404 alleles, homozygotes = 883).
No further detail was recorded.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02). REVEL score = 0.519. BayesDel score = 0.0304758.
4 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
In the FGFR4 gene transcript from MDA-MB-453 mammary carcinoma cells, a G to A conversion was discovered that results in the substitution of glycine by arginine at position 388 in the transmembrane domain of the receptor.
Abstract; full text not available for review.
Variant rs351855-G/A is a commonly occurring single-nucleotide polymorphism of coding regions in exon 9 of the fibroblast growth factor receptor FGFR4 (CD334) gene (c.1162G>A). It results in an amino-acid change at codon 388 from glycine to arginine (p.Gly388Arg) in the transmembrane domain of the receptor.
Abstract; full text not available for review.
Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.
The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.
This variant is present in gnomAD v4.1 (AF= 0.302607; MAF= 30.26074%, 487943/1612462 alleles, homozygotes = 76363) and has highest observed frequency in the East Asian population (AF= 0.438296; MAF= 43.82956%, 19626/44778 alleles, homozygotes = 4303); grpmax FAF= 0.433162.
This variant is present in gnomAD v2.1 (AF= 0.321122; MAF= 32.11218%, 89487/278670 alleles, homozygotes = 15309) and has highest observed frequency in the East Asian population (AF= 0.450672; MAF= 45.06722%, 8917/19786 alleles, homozygotes = 2008); grpmax FAF= 0.441438.
This variant is present in gnomAD-Canada v1.0 (AF= 0.3066724625081504, 5644/18404 alleles, homozygotes = 883).
This variant has been reported in ClinVar as Benign (3 clinical laboratories). (ClinVarID = 16326)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02). REVEL score = 0.519. BayesDel score = 0.0304758.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. FGFR4, a receptor tyrosine kinase, is altered by mutation, chromosomal rearrangement or amplification at low frequencies in various cancer types.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV52800825, n = 88 times).
This variant does not lie in a statistically significant hotspot.