The Decline of Salivary Adenocarcinoma Not Otherwise Specified as a Tumor Entity

The classification of salivary gland carcinomas has become increasingly specific over the last decade with the definition of new tumor types, documentation of novel molecular and immunohistochemical findings, and development of more refined diagnostic criteria. In this setting, it is unclear how many salivary tumors still cannot be easily categorized—and whether such tumors represent undifferentiated malignancies or include additional definable...