Case: 30, F, 32, Indian

DiseaseAssertion: VWD type 3

FamilyInfo: Consanguinity: No

ParentalGenotype: n/a

CasePresentingHPOs: n/a

CaseHPOFreeText: VWF:Ag (U/dl): 1, Bleeding symptoms: Mild

CaseNotHPOs: n/a

CaseNotHPOFreeText: Anti-VWF alloantibodies: no

CasePreviousTesting: n/a

Gene: VWF

Variant:

6977-1G→C (intronic), Exon 41, Homozygous

Note: The article assumes 6977-1G→C would be a frameshift mutation. It is possible that the homozygous zygosity was detected from a PCR artifact (e.g. presence of a large gene deletion or point mutation that prevents amplification); different sets of primers were used, providing conformation and excluding the possibility for a PCR artifact due to point mutation. No potential splice site mutation was confirmed at the mRNA level; “Splice Site Prediction program” found all mutations likely to disrupt normal splicing. No possible splice site mutation could be identified on 100 chromosomes from a group of 50 normal subjects with same genetic background as patients, excluding the possibility that these mutations represent common polymorphisms