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    Mass Spectrometry but not Fluorimetry Distinguishes Affected and Pseudodeficienies in Newborn Screening for Pompe Disease
    2
    1. ClingenBaseline 23 Oct 2026

      CaseIP2-9: Male, Taiwan, Birth diagnosis

      HPOsFreeText: GAA (MS/MS) enzyme activity at 0.09 umol/hr/L, Serum CK at 483 U/L

      GenotypingMethod: GAA Gene Sequencing and PCR Amplification

      Variant1: NM_000152.4:c.1935C>A (p.Asp645Glu)

      ClinVar: 4029 https://www.ncbi.nlm.nih.gov/clinvar/variation/4029/

      gnomAD: East Asian 1.729e-3, Overall 1.240e-4 http://gnomad.broadinstitute.org/variant/17-78086721-C-A

      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

      Variant3: NM_000152.4:c.2274dup (p.Gly759Argfs*?)

      CAID: CA658795280 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvs=NM_000152.4%3Ac.2273_2274insC

      gnomAD: Not in gnomAD

      CaseAddInfo: Infantile Onset Pompe Disease, Nomenclature indicates that Variant 1 and 2 are in cis

      Individual CaseInfo Variant GenotypingMethod ClinVarID:4029 ClinVarID:92467 CA658795280 inferred_gene_hgnc:4065 inferred_gene_source:CAID GAA variant
    2. ClingenBaseline 23 Oct 2026

      CaseIP-4: Male, Taiwan, Birth diagnosis

      HPOsFreeText: 4MU enzyme activity at 0.45, MS/MS ennzyme activity at 0.09

      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.1935C>A (p.Asp645Glu)

      ClinVar: 4029 https://www.ncbi.nlm.nih.gov/clinvar/variation/4029/

      gnomAD: East Asian 1.729e-3, Overall 1.240e-4 http://gnomad.broadinstitute.org/variant/17-78086721-C-A

      Variant in literature as c.2274insC, however investigation revealed it was primarily a duplication.

      Variant3: NM_000152.4:c.2274dup (p.Gly759Argfs*?)

      CAID: CA658795280 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvs=NM_000152.4%3Ac.2273dupC

      gnomAD: Not in gnomAD

      CaseAddInfo: Infantile Onset Pompe Disease, Nomenclature indicates Variant 1 and 2 are in cis

      Individual CaseInfo GenotypingMethod Variant ClinVarID:92467 ClinVarID:4029 CA658795280 inferred_gene_hgnc:4065 inferred_gene_source:CAID GAA variant
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    ncbi.nlm.nih.gov/pmc/articles/PMC5524447/