Is ENI necessary for postoperative treatment of clinically N0 adenoid cystic carcinoma of the head and neck?

Adenoid cystic carcinoma (ACC) is an uncommon malignancy of the head and neck characterized by an intermediate growth rate and a propensity for local recurrence, perineural tumor spread, and distant metastasis. Historically thought to be radioresistant, patients were treated with surgery alone until...