EGFR and non-small cell squamous lung carcinoma: For example, although necitumumab's indication refers to “epidermal growth factor receptor (EGFR) expressing squamous non-small cell lung cancer”, it does not specifically require testing for “epidermal growth factor receptor (EGFR)-activating mutations” as required for both dacomitinib and osimertinib; the latter two requiring the use of a CDx.