This variant, c.1156C>T (p.Gln386Ter), is a nonsense variant that is predicted to result in nonsense mediated decay and lack of gene product, meeting PVS1. This variant is absent in gnomAD v2.1.1, meeting PM3. A Korean patient with infantile onset Pompe disease, meeting the specifications for PP4, has been reported. This patient is compound heterozygous for the variant and c.1857C>G (p.Ser619Arg). This in trans data has been used in the assessment of p.Ser619Arg and was not be included here to avoid circular logic. There is a ClinVar entry for this variant (Variation ID: 188858; 1 star review status) with one submitter classifying the variant as likely pathogenic. In summary, this variant meets criteria to be classified as pathogenic for Pompe disease. ACMG/AMP criteria met, as specified by the ClinGen LSD VCEP: PVS1, PM2, PP4.