In fecal samples from patients newly diagnosed with metastatic NSCLC and lacking driver gene mutations (e.g., epidermal growth factor receptor, anaplastic lymphoma kinase, receptor tyrosine kinase), the top 10 most abundant genera were Blautia spp., Streptococcus spp., Faecalibacterium spp., Collinsella spp., Bacteroides spp., Dorea spp., Eubacterium hallii spp., Romboutsia spp., Lactobacillus spp. Here, EGFR is linked to non-small cell lung carcinoma.