Rha MS, et al. - Via conducting a retrospective review of data from seven patients with sinonasal pleomorphic adenoma who were treated by the authors at a tertiary medical center between January 2005 and May 2017, diagnosis, management, and treatment outcome characteristics of sinonasal pleomorphic adenoma were determined and predictors for disease recurrence were identified. Findings suggest a rare occurrence of pleomorphic adenoma (a benign tumor of the sinonasal tract). Surgery achieving clear margins is the treatment of choice. An endoscopic endonasal approach allows accessing the tumor in most cases, although incomplete resection of the tumor stem may allow for tumor recurrence. In addition, a high prevalence of recurrence was evident in significant association with a tumor originating from the paranasal sinus.