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A retrospective review was performed on 123 patients with parotid tumor who underwent surgery at our hospital between 2010 and 2014. The age range of the subjects (75 men and 48 women) was 18‒82 years (average : 54.3). Of the 123 cases, 105 were benign and 18 were malignant. The results of preoperative computed tomography (CT), magnetic resonance imaging (MRI), fine-needle aspiration cytology (FNA), and intraoperative frozen-section (FS) were compared with the final histopathologic diagnosis. The sensitivity and specificity for detecting malignant tumors were 53.8% (10/17) and 92.4% (61/66) on CT, 58.8% (10/17) and 94.9% (94/99) on MRI, 30.8% (4/13) and 100% (81/81) on FNA, and 75.0% (12/16) and 96.9% (95/98) on FS, respectively. Our analysis showed a superiority of FS over other examinations ; however, there were 4 false negative and 3 false positive cases. In those cases, we needed to determine the extent of surgery after considering preoperative surveys and intraoperative findings of the tumor.

A clinical analysis of preoperative and intraoperative surveys with parotid tumors