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Types of von Willebrand disease
| Type | % vWD | Defect in vWF | Factor VIIIc |
|---|---|---|---|
| 1 | 80 | Partial quantitative decrease of vWF | May be normal |
| 2A | 15 | Predominantly qualitative defect of vWF | Reduced |
| 2B | Rare | Predominantly qualitative defect of vWF | Reduced |
| 2C | Rare | Predominantly qualitative defect of vWF | Reduced |
| 2M | Rare | Predominantly qualitative defect of vWF | Reduced |
| 2N | Rare | Predominantly qualitative defect of vWF | Reduced |
| 3 | 5 | Complete lack of vWF | Reduced |
