MMP9 and non-small cell lung carcinoma: BCYRN1 (brain cytoplasmic RNA 1, also known as BC200), a 200‐nucleotide LncRNA, was found highly expressed in some carcinomas of the breast, cervix, oesophagus, lung, ovary, etc, but normally not detectable in the corresponding normal tissues.48 Hu et al found BCYRN1 was the target gene of c‐MYC and could mediate cell migration and invasion in NSCLC via influencing the expressions of MMP9 and MMP13.49 In conclusion, BCYRN1 is an oncogene, and the metastasis of NSCLC was increased by c‐MYC–activated BCYRN1 promoting the expressions of MMP9 and MMP13.