Overview
Glanzmann's thrombasthenia (GT) is a rare inherited bleeding disorder characterized by impaired platelet aggregation due to defects in the GPIIb/IIIa integrin complex, leading to severe bleeding tendencies 12.Diagnosis
Deficiency or dysfunction of GPIIb/IIIa (αIIbβ3) integrin confirmed by flow cytometry or platelet aggregation studies 12.
Bleeding time significantly prolonged 1.
Platelet aggregation typically absent or markedly reduced with standard agonists like ADP, collagen, and thrombin 12.Management
First-line treatment: Platelet transfusions to manage acute bleeding episodes 1.
Adjunctive treatments:
- Recombinant activated factor VII (rFVIIa) at 90 μg/kg per infusion for managing bleeding episodes, especially in refractory cases or those with anti-GPIIb/IIIa antibodies 1.
- Antifibrinolytic agents (e.g., tranexamic acid) may be used in conjunction with rFVIIa 1.Special Populations
Pediatrics: Dental extractions can often be performed successfully without supplemental therapy in children, though close monitoring is essential 3.
Pregnancy: Specific management strategies not detailed in provided abstracts; individualized care with close surveillance recommended 1.Key Recommendations
Use recombinant activated factor VII (rFVIIa) at 90 μg/kg per infusion for managing bleeding episodes in Glanzmann's thrombasthenia, particularly in cases with anti-GPIIb/IIIa antibodies or transfusion refractoriness (Evidence: Moderate) 1.
Platelet transfusions remain the standard for acute bleeding control, though monitor for development of alloantibodies (Evidence: Expert opinion) 1.
Consider antifibrinolytic agents as adjunctive therapy during surgical interventions to reduce bleeding risk (Evidence: Weak) 1.References
1 Saultier P, Grino M, Falaise C, Voisin S, Lavenu-Bombled C, Ibrahim-Kosta M et al.. Efficacy and safety of recombinant activated factor VII in Glanzmann thrombasthenia: A systematic literature review. Haemophilia : the official journal of the World Federation of Hemophilia 2025. link
2 Coller BS, Shattil SJ. The GPIIb/IIIa (integrin alphaIIbbeta3) odyssey: a technology-driven saga of a receptor with twists, turns, and even a bend. Blood 2008. link
3 Jasmin JR, Dupont D, Velin P. Multiple dental extractions in a child with Glanzmann's thrombasthenia: report of case. ASDC journal of dentistry for children 1987. link