MAPK1 and head and neck squamous cell carcinoma: A recent study showed that multiple MAPK pathway mutations found in HNSCC patient tumors, including BRAF p.V600E, HRAS p.G12V, MEK1 p.K57N, MEK2 p.F57L, MAPK1 p.E322K, MAPK1 p.D321N, ARAF p.S214F, ARAF p.P508L, as well as wildtype A/BRAF genes could significantly suppress p-ErbB3 levels in HNSCC cells7.