HRAS mutations are also detected in mucoepidermoid carcinomas, adenoid cystic carcinomas, acinic cell carcinomas, salivary duct carcinomas, and the incidence of HRAS mutations is reported to be 11.1–21%, which is relatively high compared to HNSCCs [24,25,26,27]. Here, HRAS is linked to salivary duct carcinoma.