A recent evidence has reported the presence of different mutations in PIK3CA, CASP8, NOTCH1 or TP53 genes in oral tumors with better treatment response and mutations in NSD1, WNT and NFE2L2 genes in LC [18].Molecular profiling of genes that influence HNSCC and LC proteins is very important, as it represents a valid tool for testing selected biomarkers. The gene discussed is NSD1; the disease is laryngotracheoesophageal cleft.