EGFR Exon 20 Mutation

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A molecular genetic abnormality indicating the presence of a mutation in exon 20 of the EGFR gene.

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