PLA2G7 and familial isolated congenital asplenia: In the third and fourth quartiles of Lp-PLA2 levels, stenosis had occurred more frequently in the ICAS group than in the other three groups (third Q: 50.0% vs. 3.1% vs. 28.1% vs. 18.8%, p = 0.002; fourth Q: 48.4% vs. 16.1% vs. 25.8% vs. 9.7%, p = 0.014).