EGFR Exon 20 Deletion Mutation

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A molecular genetic abnormality indicating the presence of an in-frame deletion mutation occurring within exon 20 of the EGFR gene.

**Synonyms:** - EGFR Exon 20 Gene Deletion Mutation - ERBB Exon 20 Deletion Mutation - ERBB1 Exon 20 Deletion Mutation - Epidermal Growth Factor Receptor Gene Exon 20 Deletion Mutation - HER1 Exon 20 Deletion Mutation