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Bernard-Soulier syndrome: a case report
B J Pansatiankul1, N Opartkiattikul, W Sangtawesin
1Children's Hospital, Bangkok, Thailand.
Summary
Bernard-Soulier syndrome, a rare bleeding disorder, was diagnosed in an 8-month-old Thai girl due to easy bruising and petechiae. Lab tests revealed giant platelets and a lack of glycoprotein Ib, confirming the diagnosis.
Area of Science:
- Hematology
- Genetics
- Pediatric Medicine
Background:
- Bernard-Soulier syndrome is a rare autosomal recessive disorder characterized by prolonged bleeding time.
- It is caused by defects in platelet glycoproteins Ib-IX-V complex, crucial for platelet adhesion.
- Diagnosis relies on clinical presentation and specific laboratory findings.
Observation:
- A case study of an adopted Thai girl followed since 8 months of age at Children's Hospital, Bangkok.
- Clinical features included easy bruising, purpura, petechial hemorrhages, and recurrent epistaxis.
- Abnormal laboratory tests showed giant platelets with dark granules, thrombocytopenia, and prolonged bleeding time.
Findings:
- Specific laboratory findings included absence of ristocetin-induced platelet agglutination.
- Ristocetin cofactor activity, factor VIII coagulant activity, and von Willebrand factor antigen levels were normal.
- These results strongly suggested the absence of glycoprotein Ib (GPIb) on the patient's platelet membrane.
Implications:
- This case highlights the diagnostic criteria for Bernard-Soulier syndrome in a pediatric patient.
- The findings underscore the importance of platelet function tests in diagnosing inherited bleeding disorders.
- Further genetic studies would be needed to evaluate transmission patterns in similar cases.