IKBKG and incontinentia pigmenti: In a previous large‐scale study of IP, 65% of the cases had the common exon 4‐10 deletion in the IKBKG gene (Fusco et al., 2008), 8.6% harbored SNVs (Fusco et al., 2007), and 4% had a larger deletion at the IKBKG locus (Conte et al., 2014).