{{Rsnum
|rsid=3738414
|Gene=VTCN1
|Chromosome=1
|position=117210906
|Orientation=plus
|GMAF=0.0854
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=VTCN1
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 0.0 | 1.8 | 98.2
| HCB | 7.3 | 36.5 | 56.2
| JPT | 12.4 | 35.4 | 52.2
| YRI | 0.0 | 0.0 | 100.0
| ASW | 0.0 | 0.0 | 0.0
| CHB | 7.3 | 36.5 | 56.2
| CHD | 9.2 | 40.4 | 50.5
| GIH | 0.0 | 0.0 | 0.0
| LWK | 0.0 | 0.0 | 0.0
| MEX | 0.0 | 7.0 | 93.0
| MKK | 0.0 | 0.0 | 0.0
| TSI | 0.0 | 2.0 | 98.0
| HapMapRevision=28
}}
[[rs3738414]] is a SNP in the V-set domain containing T cell activation inhibitor 1 [[VTCN1]] gene, which is also known as B7-H4. 

A study of 500 Chinese Han women with breast cancer (and an equal number of matched controls) concluded that the [[rs3738414]](A;A) genotype showed a significantly decreased risk of [[breast cancer]] (odds ratio 0.412, CI: 0.203-0.835).{{PMID|19903360|OA=1
}}

{{PMID Auto
|PMID=24125968
|Title=An investigation of the effects of FGFR2 and B7-H4 polymorphisms in breast cancer
}}

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}