CEACAM6 and Patent ductus arteriosus: The classical PDA subtype has been shown to be dependent on mutant KRAS. A study reported earlier18 with multiple cancer cell lines for gene signatures in KRAS dependent cells showed CEACAM6 as one of the genes associated or dependent on KRAS. We also found a significant association with a p-value 0.002 between continuous high CEACAM6 expression and mutant KRAS PDA samples using logistic regression.