FAT1 and head and neck squamous cell carcinoma: This analysis also revealed that FAT1 mutation was a promising predictor of poor outcome in HPV‐ HNSCC patients, as FAT1 mutation was statistically significant in predicting 3‐year OS (P = 0.00149) and 5‐year OS (P = 0.000115) for this patient population (Figure 1C).