Abstract:22q11.2 deletion syndrome (22q11DS) has an incidence of 1 in 4,000. Most cases occur de novo, but about 10-15% of cases are inherited. Features include congenital heart disease, cleft palate, developmental delay, and other characteristics that can vary even among family members. The presence of nuclear mitochondrial genes in the deleted region, and the requirement of mitochondrial function for proper embryonic development, suggests that intrafamilial variability in maternally transmitted 22q11DS could be expla… Show more
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