In particular, an investigation analyzing the association between lung cancer somatic mutations and occupational exposure in never-smokers shows that patients exposed to PAHs were mostly diagnosed with gene v-raf murine sarcoma viral oncogene homolog B1 (BRAF) mutation and gene kirsten rat sarcoma viral oncogene homolog (KRAS) mutation (15). The gene discussed is BRAF; the disease is lung carcinoma.