“…12,13 Since SGCs represent a dynamic diagnostic-therapeutic scenario in continuous evolution, we carried out a literature search between January 2009 and January 2019, in order to try to include data as homogeneous as possible by overcoming potential biases in diagnosis, staging and treatment indications that might have arisen from a wider temporal span. 14 This search was then set to automatically update until the December 31, 2020. MESH and free-text terms such as "salvage surgery," "salivary gland tumors," "salivary gland carcinomas," "salivary gland malignancies," "surgical treatment of salivary gland carcinoma recurrence," "salivary gland carcinoma recurrence," "recurrent salivary cancer," "recurrent salivary tumors," and "recurrent salivary malignancy," were interrogated in the PubMed, Embase, and LILACS databases.…”