Pseudohemophilia of Erik von Willebrand caused by homozygous one nucleotide deletion in exon 18 of the VW-factor gene

Table 5 Von Willebrand factor antigen (VWF: Ag) levels in heterozygous carriers for a null allele related to pseudohemophilia A-von Willebrand disease type 3 and for the mutation C2364F related to severe recessive type 1 von Willebrand disease

Carriers	Number ofpatients	VWF: Ag mean ± SD(IU/dL)	VWF: Ag range(IU/dL)
Null allele:
Blood group O	15	43.2 ± 10.8	30-66
Blood group non-O	15	61.3 ± 23.6	25-98
C2364F:
Blood group O	8	35.2 ± 16.2	25-55
Blood group non-O	15	61.5 ± 26.6	30-140

VWF: von Willebrand factor; VWD: von Willebrand disease.