EGFR L858R Negative

**Semantic type:** Laboratory or Test Result

**Definition:** An indication that expression of the activating EGFR protein variant L858R has not been detected in a sample.

**Synonyms:** - EGFR L858R Mutation Negative - EGFR NP_005219.2:p.L858R Negative - EGFR NP_005219.2:p.Leu858Arg Negative - EGFR p.L858R Negative - EGFR p.Leu858Arg Negative - Epidermal Growth Factor Receptor L858R Negative - NP_005219.2:p.L858R Negative - NP_005219.2:p.Leu858Arg Negative