{{Rsnum
|rsid=4675374
|Gene=ICOS
|Chromosome=2
|position=203937855
|Orientation=plus
|GMAF=0.3962
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=ICOS,LOC101927840
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 68.1 | 26.5 | 5.3
| HCB | 27.7 | 57.7 | 14.6
| JPT | 28.3 | 53.1 | 18.6
| YRI | 4.1 | 38.8 | 57.1
| ASW | 15.8 | 43.9 | 40.4
| CHB | 27.7 | 57.7 | 14.6
| CHD | 39.4 | 48.6 | 11.9
| GIH | 65.3 | 32.7 | 2.0
| LWK | 2.7 | 36.4 | 60.9
| MEX | 56.9 | 34.5 | 8.6
| MKK | 6.5 | 38.7 | 54.8
| TSI | 58.8 | 34.3 | 6.9
| HapMapRevision=28
}}{{PMID Auto GWAS
|PMID=20190752
|Trait=Celiac disease
|Title=Multiple common variants for celiac disease influencing immune gene expression
|RiskAllele=A
|Pval=6E-9
|OR=1.14
|ORtxt=[1.09-1.19]
|OA=1
}}

{{PMID Auto
|PMID=21917182
|Title=ICOS gene polymorphisms are associated with sporadic breast cancer: a case-control study
|OA=1
}}

{{PMID|17558408|OA=1
}} A genome-wide association study for celiac disease identifies risk variants in the region harboring IL2 and IL21.

{{PMID|19672595|OA=1
}} Polymorphisms in the CD28/CTLA4/ICOS genes: role in malignant melanoma susceptibility and prognosis?

{{PMID|21383967|OA=1
}} Meta-analysis of genome-wide association studies in celiac disease and rheumatoid arthritis identifies fourteen non-HLA shared loci.

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | Illumina Human 1M}}