ESR2 and tumor of salivary gland: Nevertheless, although ER‐β expression in salivary gland tumors was only reported in a limited number of series, ER‐β was overexpressed in 27 of 38 (71%) patients in a series of adenoid cystic carcinomas and in 57 of 80 (73%) in a series of salivary duct carcinomas.16, 52