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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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Item Value
ClinicalQuestion Does my patient have von Willebrand disease? If so, which type?
TestEntryNumber 174
TestCode CBC
TestName Factor 8 Activity
Synonyms F8; FVIII; FVIII:C; Factor VIII
IsThisScreeningTest It depends
PubMedID PMID:18315614,11686101
NLMID:101518625,101539022
Comment - thrombocytopenia is neither sensitive nor specific for vWD, although thrombocytopenia may be a feature of vWD (in particular, type 2B and platelet-type)
- consider other diagnoses in addition to vWD if thrombocytopenic
Sensitivity Unknown
Specificity Unknown
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