splicing_variant exon_loss_variant Jannovar:exon_loss_variant kareneilbeck 2010-03-22T02:31:09Z exon loss sequence snpEff:EXON_DELETED skipped exon SO:0001572 http://snpeff.sourceforge.net/SnpEff_manual.html Added "skipped exon" as a synonym of exon_loss_variant at the request of Melissa Landrum of the NCBI on 31 July 2025 (see GitHub issue #657). A sequence variant whereby an exon is lost from the transcript.