Case22: Patient AP, gender and age are not specified

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: HP:0000421, HP:0000225, HP:0006298

(Epistaxis, gingival bleeding, prolonged bleeding after tooth extraction)

CaseHPOFreeText: Hematoma

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: 12-20% GPIIIa and GPIIb surface expression

PlateletAggregation: N/A

CasePreviousTesting: N/A

Gene: ITGA2B

Variant: NM_000419.3:c.3077G>A (p.Arg1026Gln) other mutation was not found

LegacyVariant: N/A

ClinVar: 50232

CAiD: CA10575572

gnomAD: MAF in the European (non-Finnish) population is 0.000008801 https://gnomad.broadinstitute.org/variant/17-42449775-C-T

PreviouslyPublished: References 37 and 38

Supplementary Table S1:

Case9: French/Italian, gender and age not specified

DiseaseAssertion: Glanzmann thrombasthenia type I

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: All patients had a life-long history of mucocutaneous bleeding

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: All patients in this study met the clinical and platelet function requirements for GT-- this includes an absent or strongly reduced expression of alphaIIbBeta3 in platelets

PlateletAggregation: All patients in this study met the clinical and platelet function requirements for GT-- this includes absent or severely reduced platelet aggregation with at least three physiological agonists

CasePreviousTesting: Sanger sequencing was performed. Sanger sequencing ensured coverage of all exons and splice sties of the ITGA2B and ITGB3 genes and extended 300-500 bp into the introns as well as including the UTR. They sequenced 416 bp upstream of the ITGA2B promoter and 463 bp upstream of the ITGB3 promoter. In total they sequenced 51.2% of the ITGA2B gene and 19.4% of the larger ITGB3 gene

Gene: ITGA2B

Variant: NM_000419.3:c.1440-13_1440-1del (p.Arg480Serfs*106) and NM_000419.3:c.3077G>A (p.Arg1026Gln)

LegacyVariant: N/A

ClinVar: 50232

CAiD: CA913184940 and CA10575572

gnomAD: MAF in the European (non-Finnish) population is 0.000008801 https://gnomad.broadinstitute.org/variant/17-42449775-C-T for (p.Arg1026Gln)

Case#: Male, 48

Disease: Glazmann's Thrombasthenia Like Syndrome

CasePresentingHPOs: HP:0001873, HP:0000421, HP:0031364, HP:0000225

Thrombocytopenia, Epistaxis, Ecchymosis, Gingival bleeding

CaseNotHPOs: NA

FamilyInfo: Pedigree figure 1. Family history of thrombocytopenia.

PlateletAgreggation: Decreased PLT aggregation and diminished ATP release with the agonists ADP, collagen, and AA, with normal ristocetin agglutination

GenotypingMethod: Genetic analysis of ITGA2B and ITGB3 genes was performed by next-generation sequencing (NGS). Sanger sequencing used to confirm variants.

ClinVar: 50232

CAID: CA10575572

Variant: NM_000419.5:c.3077G>A

GnomAD: European non-Finnish 0.000008801 (1/113618)

ExpressionEvidence: Level of expression on PLT surface determined by FCM: CD41a (GPIIb/IIIa) 49%, CD61 (GPIIIa) 44%, and CD42b (GPIb) 105%. Healthy control value range: CD41a (GPIIb/IIIa) (85-115%); CD61 (GPIIIa) (80-120%); CD42b (GPIb) (70-130%).