Evaluation and Management of Adolescent Females with Heavy Menstrual Bleeding

Diagnostic Considerations

• The American Society of Hematology recommends that adolescent females with heavy menstrual bleeding undergo immediate specialized testing for von Willebrand disease (VWD) and platelet function disorders, as standard coagulation tests (PT/aPTT) do not detect these conditions 1, 2, 3
• Standard PT and aPTT testing does not detect VWD, Factor XIII deficiency, or platelet function disorders, which are the most likely diagnoses in this clinical scenario 1, 2
• Up to 20% of adolescents with heavy menstrual bleeding have an underlying bleeding disorder, with VWD being the most common inherited bleeding disorder (prevalence approximately 1 in 1000) 3
• Normal platelet count does not rule out qualitative platelet defects that can cause significant bleeding manifestations 2

Specialized Testing

• VWD-specific testing must include VWF antigen (VWF:Ag), VWF ristocetin cofactor activity (VWF:RCo), and Factor VIII coagulant activity (FVIII:C) 1, 2, 4
• Additional required tests include complete blood count with peripheral blood smear review, fibrinogen level, and platelet function studies if VWD testing is normal but clinical suspicion remains high 2, 3, 4

Clinical Assessment and Management

• The American Academy of Pediatrics recommends quantifying menstrual blood loss using the Pictorial Bleeding Assessment Chart (PBAC) score, with a score >100 increasing diagnostic sensitivity to 95% 3
• First-line medical management for acute bleeding control includes tranexamic acid, which reduces menstrual blood loss by up to 50% 3
• Hormonal options for maintenance therapy include combined oral contraceptive pills and the 52-mg levonorgestrel intrauterine device, which has superior efficacy for heavy menstrual bleeding and is safe in adolescents with bleeding disorders 3

Critical Pitfalls to Avoid

• Do not assume normal PT/aPTT rules out bleeding disorders, as this is the most common diagnostic error in this population 1, 2
• Do not delay hematology referral while waiting for specialized test results if bleeding is severe 3, 4

Mandatory Hematology Referral Indications

• Immediate consultation is required for interpretation of specialized VWD testing, platelet function studies, and coordination of desmopressin (DDAVP) trial or factor replacement therapy if VWD confirmed 2, 3, 4