Case: Case 3, female

DiseaseAssertion: Platelet-type VWD (PT-VWD)

FamilyInfo: NA

ParentalGenotype(s): NA

CasePresentingHPOs: HP:0000978, HP:0000421, HP:0000132, HP:0004846, HP:0001873, HP:0030129, HP:0030132

(easy bruising, epistaxis, Menorrhagia, Prolonged bleeding after surgery, thrombocytopenia, Impaired ristocetin cofactor assay activity, Absence of large von Willebrand factor multimers)

CaseHPOFreeText: pregnancy complicated by progressive thrombocytopenia; Platelet (×109/L) = 135, Factor VIII (IU/mL) = 0.78, VWF:Ag (IU/mL) = 0.69, VWF:RCo (IU/mL) = 0.22, VWF:CB (IU/mL) = ND, RCo/Ag ratio = 0.32, CB/Ag ratio = ND, VWF: HMW Multimers = absent

CaseNOTHPOs: NA

CaseNOTHPOFreeText: NA

CasePreviousTesting: NA

GenotypingMethod: NA

PreviouslyPublished: NA

Gene: GP1BA

Variant: c.746G>T (p.Gly249Val)

HGVS: NM_000173.7(GP1BA):c.746G>T (p.Gly249Val)

ClinVarID: 4153; https://www.ncbi.nlm.nih.gov/clinvar/variation/4153/

CAID:

gnomAD: absent

Case: Case 4, female, 5yo at onset, 20yo at report

DiseaseAssertion: Platelet-type VWD (PT-VWD)

FamilyInfo: Fhx of VWD; father diagnosed with type 2B VWD

ParentalGenotype(s): NA

CasePresentingHPOs: HP:0000978, HP:0000421, HP:0000132, HP:0001873, HP:0004846

(easy bruising, epistaxis, menorrhagia, thrombocytopenia, Prolonged bleeding after surgery)

CaseHPOFreeText: pregnancy complicated by thrombocytopenia, Platelet aggregation studies were normal to ADP, epinephrine, collagen, and arachidonic; Platelet (×109/L) = 156, Factor VIII (IU/mL) = ND, VWF:Ag (IU/mL) = 0.57, VWF:RCo (IU/mL) = 0.86, VWF:CB (IU/mL) = ND, RCo/Ag ratio = 1.15, CB/Ag ratio = ND, VWF: HMW Multimers = normal

CaseNOTHPOs: NA

CaseNOTHPOFreeText: NA

CasePreviousTesting: no mutations in exon 28 of the VWF gene

GenotypingMethod: NA

PreviouslyPublished: NA

Gene: GP1BA

Variant: c.746G>T (p.Gly249Val)

HGVS: NM_000173.7(GP1BA):c.746G>T (p.Gly249Val)

ClinVarID: 4153; https://www.ncbi.nlm.nih.gov/clinvar/variation/4153/

CAID:

gnomAD: absent