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    Mass Spectrometry but not Fluorimetry Distinguishes Affected and Pseudodeficienies in Newborn Screening for Pompe Disease
    2
    1. ClingenBaseline 07 Nov 2026

      CaseOPTPD-5: Female, Taiwan, Birth diagnosis

      HPOsFreeText: GAA (MS/MS) enzyme activity at 1.27 umol/hr/L

      GenotypingMethod: GAA Gene Sequencing and PCR Amplification

      Variant1: NM_000152.4:c.1726G>A (p.Gly576Ser)

      ClinVar: 92467 https://www.ncbi.nlm.nih.gov/clinvar/variation/92467/

      gnomAD: East Asian 0.1427, Overall 0.01700 http://gnomad.broadinstitute.org/variant/17-78085871-G-A

      Variant2: NM_000152.4:c.1222A>G (p.Met408Val)

      ClinVar: 371235 https://www.ncbi.nlm.nih.gov/clinvar/variation/371235/

      gnomAD: European (Non-Finnish) 1.790e-5, Overall 8.058e-6 http://gnomad.broadinstitute.org/variant/17-78082523-A-G

      CaseAddInfo: One Pompe Mutation allele and Two Pseudodeficency Mutation alleles, Nomenclature indicates patient is homozygous for Variant 1 and Variant 2 is in cis with one copy

      Individual CaseInfo Variant GenotypingMethod ClinVarID:371235 ClinVarID:92467 inferred_gene_hgnc:4065 inferred_gene_source:ClinVar GAA variant
    2. ClingenBaseline 06 Nov 2026

      CaseOPOPD-44: Female, Taiwan, Birth diagnosis

      HPOsFreeText: GAA (MS/MS) enzyme activity at 1.51 umol/hr/L

      GenotypingMethod: GAA Gene Sequencing and PCR Amplification

      Variant1: NM_000152.4:c.1222A>G (p.Met408Val)

      ClinVar: 371235 https://www.ncbi.nlm.nih.gov/clinvar/variation/371235/

      gnomAD: European (Non-Finnish) 1.790e-5, Overall 8.058e-6 http://gnomad.broadinstitute.org/variant/17-78082523-A-G

      Variant2: NM_000152.4:c.1726G>A (p.Gly576Ser)

      ClinVar: 92467 https://www.ncbi.nlm.nih.gov/clinvar/variation/92467/

      gnomAD: East Asian 0.1427, Overall 0.01700 http://gnomad.broadinstitute.org/variant/17-78085871-G-A

      CaseAddInfo: One Pompe Mutation allele and One Pseudodeficency Mutation allele

      Individual CaseInfo Variant GenotypingMethod ClinVarID:371235 ClinVarID:92467 inferred_gene_hgnc:4065 inferred_gene_source:ClinVar GAA variant
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    ncbi.nlm.nih.gov/pmc/articles/PMC5524447/