The association of variant in the 3′UTR of KRAS gene occupying the complementary site let-7 miRNA (KRAS-LCS6) was checked with HNSCC (head and neck squamous cell carcinoma); though the overall risk of HNSCC was not associated with LCS6, it was observed that KRAS-LCS6 carriers had a reduced survival rate compared to others [19]. The gene discussed is KRAS; the disease is head and neck squamous cell carcinoma.