“…After institutional research ethics board approval, a retrospective review was conducted of all newly diagnosed salivary duct carcinomas of major salivary glands treated with curative intent in our institution between January 1, 1999 and August 1, 2010 inclusive. Clinical information, including patient, disease, treatment characteristics, and outcome, was collected prospectively via an institutional Head and Neck Cancer Anthology of Outcomes System, and supplemented by data from the provincial population‐based Ontario Cancer Registry to enhance data quality. All patients were staged by the TNM Staging System (2010, 7th edition) of the International Union Against Cancer and American Joint Committee on Cancer .…”