Oncology
Session # P048, Group 1
Fanconi anemia subtype S (FA-S) is an extremely rare, autosomal recessive disorder caused by biallelic pathogenic mutations in BRCA1 and is characterized by physical abnormalities, developmental delay, and increased chromosomal breakage. The rarity of FA-S is likely due to embryonic lethality and cases resulting in live birth may be the result of some level of retained functional BRCA1 protein.