How should I evaluate and manage a 44-year-old woman presenting with frequent bruising?

Evaluation and Management of Frequent Bruising in a 44-Year-Old Woman

Begin with a structured bleeding assessment using a validated tool, obtain a complete blood count with peripheral smear, PT/INR, aPTT, and fibrinogen levels as your initial laboratory workup 1, 2.

Initial Clinical Assessment

Key History Elements to Obtain

• Bleeding severity quantification: Use the International Society on Thrombosis and Haemostasis bleeding assessment tool to systematically document bleeding symptoms and distinguish pathologic from physiologic bruising 2, 3
• Pattern of bruising: Location (mucocutaneous vs deep tissue), size, frequency, and relationship to trauma
• Associated bleeding symptoms: Epistaxis, gingival bleeding, menorrhagia, prolonged bleeding after dental procedures or surgery, gastrointestinal bleeding
• Family history: Critical for identifying hereditary disorders like von Willebrand disease (the most common inherited bleeding disorder) 2, 4
• Medication review: Anticoagulants, antiplatelet agents (aspirin, NSAIDs), SSRIs, herbal supplements
• Systemic symptoms: Fever, weight loss, night sweats suggesting hematologic malignancy

Physical Examination Findings

• Mucocutaneous bleeding (petechiae, purpura, oral bleeding) suggests platelet dysfunction or thrombocytopenia
• Hemarthroses or deep hematomas indicate coagulopathy (factor deficiencies)
• Pattern and location of bruising: Consider nonaccidental trauma in vulnerable populations 1

Laboratory Evaluation Algorithm

First-Line Testing 1, 2

1. Complete blood count with platelet count
2. Peripheral blood smear
3. Prothrombin time (PT) and INR
4. Activated partial thromboplastin time (aPTT)
5. Fibrinogen level

Interpretation of Initial Results

Normal PT and aPTT: Suspect platelet disorder, most commonly von Willebrand disease. Proceed to von Willebrand factor testing (antigen, activity, factor VIII levels) 2, 4

Normal PT with prolonged aPTT: Indicates intrinsic pathway defect (factors VIII, IX, XI, XII). Perform mixing study to distinguish factor deficiency from inhibitor 2

Prolonged PT with normal aPTT: Suggests extrinsic pathway disorder (factor VII deficiency) or early vitamin K deficiency. Consider vitamin K challenge 2

Both PT and aPTT prolonged: Evaluate for liver disease, vitamin K deficiency, disseminated intravascular coagulation, or common pathway defects 2

Second-Line Testing (If First-Line Normal but High Clinical Suspicion)

Based on the 2024 ISTH guidance, second-line testing should include 5:

• Platelet function testing (60% of centers use this as second-line)
• Specific coagulation factor assays (factors II, V, VII, X, XIII)
• von Willebrand factor comprehensive panel if not already done
• Consider platelet flow cytometry or genetic testing in select cases

When to Refer to Hematology

Refer immediately if 1, 2:

• Initial laboratory testing reveals abnormalities
• High clinical suspicion persists despite normal initial workup
• Bleeding assessment tool suggests significant pathology
• Patient requires surgical intervention and bleeding risk is uncertain

Special Considerations

Bleeding Disorder of Unknown Cause (BDUC)

Approximately 75% of hematologists formally register patients with convincing bleeding history despite normal laboratory results 5. If your patient has significant bleeding symptoms but normal hemostasis testing, document as "bleeding disorder of unknown cause" and provide hemostatic support for procedures (tranexamic acid is first-line for both minor and major surgery) 5.

Common Pitfalls to Avoid

• Don't rely solely on platelet count: Normal platelet count doesn't exclude platelet function disorders
• Don't dismiss normal screening tests: Von Willebrand disease and mild factor deficiencies can have normal PT/aPTT
• Don't overlook acquired disorders: In middle-aged adults, consider acquired hemophilia A (autoantibodies against factor VIII), though rare 6
• Timing matters: Some tests (like von Willebrand factor) can be affected by stress, inflammation, or hormonal status

Age-Specific Context

At 44 years old, this patient is past typical presentation age for congenital disorders (unless previously undiagnosed mild disease). Consider:

• Acquired bleeding disorders
• Medication effects
• Underlying systemic disease (liver disease, renal failure)
• Hormonal influences if perimenopausal

If all initial testing is normal but bleeding symptoms are convincing, refer to hematology for specialized testing including platelet function analyzer studies and comprehensive factor assays 1, 4.