Case#: Female, 75 (age when studied in 1975)

Disease: Glazmann's Thrombasthenia Like Syndrome

CasePresentingHPOs: HP:0001873, HP:0006298

Thrombocytopenia, Prolonged bleeding after dental extraction

CaseNotHPOs: NA

FamilyInfo: Pedigree figure 1. Several affected family members.

PlateletAgreggation:Daughter studied: 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.

From Daughter

ClinVar: Not Found

CAID: CA400034393

Variant: NM_000212.3:c.2278C>T (ITGB3)

GnomAD: Not Found

ExpressionEvidence: Level of expression on PLT surface determined by FCM: CD41a (GPIIb/IIIa) 52%, CD61 (GPIIIa) 77%, and CD42b (GPIb) 129%. Healthy control value range: CD41a (GPIIb/IIIa) (85-115%); CD61 (GPIIIa) (80-120%); CD42b (GPIb) (70-130%).

Case#: Female, 37 (age when studied)

Disease: Glazmann's Thrombasthenia Like Syndrome

CasePresentingHPOs: HP:0001873, HP:0000978, HP:0000225

Thrombocytopenia, bruising susceptibility, gingival bleeding

CaseNotHPOs: NA

FamilyInfo: Pedigree figure 1. Several affected family members, history of thrombocytopenia.

PlateletAgreggation:Sister studied: 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: Not Found

CAID: CA400034393

Variant: NM_000212.3:c.2278C>T (ITGB3)

GnomAD: Not Found

ExpressionEvidence: Level of expression on PLT surface determined by FCM: CD41a (GPIIb/IIIa) 73%, CD61 (GPIIIa) 74%, and CD42b (GPIb) 111%. Healthy control value range: CD41a (GPIIb/IIIa) (85-115%); CD61 (GPIIIa) (80-120%); CD42b (GPIb) (70-130%).