Case#: Patient 4, Female, 10 days old at diagnosis, African American

DiseaseAssertion: Pompe disease

FamilyInfo:N/A

CasePresentingHPOs: HP:0009062, HP:0001638

(Infantile axial hypotonia, Cardiomyopathy)

CaseHPOFreeText: Before ERT patient withdraws extremities to stimulation, contractures of large joint of upper and lower extremities, weak grasp. Also patient was invasively ventilated. Baseline – G-tube feeds and continues

Currently patient is off ventilator 10-12 hours a day. Sits with support; and has minimal capacity for weight bearing on lower extremities. G tube feed.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: No GAA measurement

Variant 1: M_000152.5(GAA):c.525del (p.Glu176fs)

ClinVar: 4033

CAID: CA220406

gnomAD: N/A

Variant 2: NM_000152.5(GAA):c.2560C>T (p.Arg854Ter)

ClinVar: 4034

CAID: CA340130

gnomAD: Highest population MAF= 0.001891 (African)

ParentalGenotype:N/A

PreviouslyPublished:N/A

Case#: P 10, Male, 7.0 months old when started ERT (Died at 21.1 months old)

DiseaseAssertion: Pompe disease

FamilyInfo: N/A

CasePresentingHPOs: HP:0001639 , HP:0001252 , HP:0003701, HP:0006532

(Hypertrophic cardiomyopathy, Muscular hypotonia, Proximal muscle weakness, Recurrent pneumonia )

CaseHPOFreeText: Patient required tube feeding

Recurrent pneumonia was a complication during ERT

Patient did not achieved motor function

CaseNotHPOs: N/A

CaseNotHPOFreeText: Patient was not ventilated

CasePreviousTesting: CRIM status was unknown

Antibody titer was not available

Variant: NM_000152.5(GAA):c.2560C>T (p.Arg854Ter)

ClinVar: 4034

CAID: CA340130

gnomAD: Highest population MAF = 0.001891 (African)

ParentalGenotype: Both the paternal and maternal allele carried the c.2560C>T (p.Arg854Ter) Variant

PreviouslyPublished: N/A

Case#: Patient 4, Gender unknown, age unknown, ethnicity unknown

DiseaseAssertion: Pompe disease

FamilyInfo: N/A

CasePresentingHPOs: HP:0001638, HP:0003756

(Cardiomyopathy, Skeletal myopathy)

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: Sequence analysis of the GAA gene was performed in a CLIA and CAP certified laboratory. Cross Reactive Immune reaction was indeterminate in peripheral blood mononuclear cells (PBMCs)

Cross Reactive Immune reaction was not available in Dried blood spots.

Variant: NM_000152.5(GAA):c.2560C>T (p.Arg854Ter)

ClinVar: 4034

CAID:CA340130

gnomAD: Highest population MAF= 0.001891 (African)

ParentalGenotype: N/A