Neonatal Glanzmann's Thrombasthenia Presenting as Refractory Post-circumcision Hemorrhage in a Region of High Consanguinity: A Case Report.

Glanzmann's thrombasthenia (GT) is a rare autosomal recessive disorder characterized by deficient or dysfunctional platelet glycoprotein IIb/IIIa (αIIbβ3 integrin), the principal fibrinogen receptor. In neonates, GT is often clinically silent until unmasked by a hemostatic challenge such as surgery or trauma. Standard coagulation screens are normal, making timely diagnosis difficult and potentially leading to life-threatening complications. We report the case of a seven-day-old Saudi boy from Najran who developed severe, refractory hemorrhage following circumcision. Initial surgical hemostasis failed despite normal platelet count and coagulation studies. Flow cytometry revealed a diagnostic immunophenotype for GT with discordant glycoprotein expression: CD41 (GPIIb) at 29% and CD61 (GPIIIa) at 7%. A retrospective review identified significant risk factors: first-degree parental consanguinity and a family history of a bleeding disorder, which had not been assessed pre-procedure. The infant was stabilized with packed red blood cells, fresh frozen plasma, and recombinant activated factor VIIa (rFVIIa). At a two-month follow-up, he remained well with only minor, self-limiting mucocutaneous bleeding. In conclusion, this case demonstrates that refractory post-procedural bleeding in neonates, despite normal routine labs, necessitates prompt investigation for a qualitative platelet disorder such as GT or other inherited thrombocytopathies. In regions with high consanguinity, where local registries report a markedly elevated prevalence, systematic preoperative screening for family bleeding history is a critical preventive measure. Flow cytometry provides a rapid preliminary diagnosis to guide acute management, though definitive GT subtyping requires platelet function studies and genetic confirmation.