{{Rsnum
|rsid=193922878
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
|Chromosome=19
|Orientation=plus
|Gene=RYR1
|position=38580370
|Gene_s=RYR1
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}[[rs193922878]], aka p.Leu4838Val or p.L4838V, is a SNP in the [[RYR1]] gene considered causative for [[malignant hyperthermia]].