We report on a male newborn with multiple congenital abnormalities consistent 
with the diagnosis of VACTERL association (vertebral, anal, cardiac, 
tracheo-esophageal fistula, renal, and limb anomalies), who had Fanconi anemia 
(complementation group B) recognized by the detection of a deletion in 
chromosome Xp22.2 using an oligonucleotide array. The diagnosis of Fanconi 
anemia was confirmed by increased chromosomal breakage abnormalities observed in 
cultured cells that were treated with cross-linking agents. This is the first 
report in the literature of Fanconi anemia complementation group B detected by 
oligonucleotide array testing postnatally.